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SynC · Editorial revision

Wood Doors

Revision4
EditedOct 12, 2026
StatusCurrent
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Current revision. This is editorial revision 4, the current text of this standard. Read it on the standard's page.

SynC Standards Team — Specifier (Platform Standards) ✓ OfficialDiscloses employment SynC (SynC Platform Team)
Datasheet constraints: every range, checkbox and listbox field now states its direction

1 Scope

NOTE This standard governs the furnishing and installation of factory-built architectural wood door leaves specified as their own package. It covers flush doors built to ANSI/WDMA I.S.1A and stile-and-rail doors built to ANSI/WDMA I.S.6A, at interior and exterior openings, in both non-rated and listed fire-rated construction. (1.1)
1.2 The furnished work shall comprise the door leaves, their factory machining for hardware, factory finishing where selected, factory-installed raceway for electrified hardware where scheduled, astragals and meeting-edge seals furnished with the leaves, and the lite and louver cutouts in the leaves.
NOTE The frame each leaf hangs in is a separate subject. Hollow metal frames are governed by Exterior Doors And FramesHollow Metal Doors and FramesResolves to the current adopted revision.sync/exterior-doors-and-frames; wood frames and jambs are furnished by the millwork trade that supplies them and are not covered here; casing and trim at the opening are governed by Finish CarpentryFinish CarpentryResolves to the current adopted revision.sync/finish-carpentry. Where the door, the frame, and the hardware are bought together as one coordinated supply, Doors Frames And HardwareDoors, Frames, and HardwareResolves to the current adopted revision.sync/doors-frames-and-hardware applies instead of this standard. (1.3)
NOTE Finish hardware, including the hinges, locksets, exit devices, closers, gasketing, automatic door bottoms, and thresholds that operate and seal the door, is governed by Door HardwareDoor HardwareResolves to the current adopted revision.sync/door-hardware. This standard governs the leaf's machining, reinforcement, blocking, and raceway for that hardware. (1.4)
NOTE Fire-rated vision glass and the listed lite kits that carry it are governed by Fire Rated GlazingFire-Rated Glazing and FramingResolves to the current adopted revision.sync/fire-rated-glazing, and non-rated vision glass by GlazingGlass and GlazingResolves to the current adopted revision.sync/glazing. This standard sizes and locates the cutout in the leaf, limits it to what the leaf's listing permits, and furnishes the wood or metal beads where the leaf manufacturer supplies them. (1.5)
1.6 The Contractor shall reconcile the door schedule, the hardware schedule, and the frame submittal against the wood door shop drawings before any leaf is released for fabrication.
NOTE A wood door is one component of an assembly that is dimensioned and, at a rated opening, tested and labeled as a set. The leaf cannot deliver its fire-protection rating, its sound rating, or its hardware function unless the frame it hangs in and the hardware fastened to it were prepared for that leaf. The reconciliation clause above is where separate packages are brought back together. (1.7)

2 Referenced Standards

2.1 Products, fabrication, and installation shall comply with the latest adopted edition of each of the following unless a specific edition is cited.
2.2 Where referenced standards conflict, the more stringent requirement shall govern unless the Architect directs otherwise in writing.
2.3 Fire-rated leaves shall comply with the edition of the fire test standard under which the leaf is listed, and the adopted building code governs which rating each opening must carry.
Standard Title
ANSI/WDMA I.S.1A Industry Standard for Interior Architectural Wood Flush Doors
ANSI/WDMA I.S.6A Industry Standard for Architectural Stile and Rail Doors
WDMA I.S.4 Industry Standard for Water-Repellent Preservative Non-Pressure Treatment for Millwork
WDMA T.M. 6 Test Method for Cycle-Slam
WDMA T.M. 7 Test Method for Hinge Loading Resistance
WDMA T.M. 10 Test Method for Screw-Holding
AWI/AWMAC/WI AWS Architectural Woodwork Standards, Section 9, Doors
ANSI A208.1 Particleboard
ANSI A208.2 Medium Density Fiberboard (MDF) for Interior Applications
ANSI/HPVA HP-1 American National Standard for Hardwood and Decorative Plywood
NEMA LD 3 High-Pressure Decorative Laminates
ANSI/BHMA A156.115-W Hardware Preparation in Wood Doors with Wood or Steel Frames
DHI WDHS.3 Recommended Locations for Architectural Hardware for Flush Wood Doors
NFPA 80 Standard for Fire Doors and Other Opening Protectives
NFPA 105 Standard for Smoke Door Assemblies and Other Opening Protectives
NFPA 252 Standard Methods of Fire Tests of Door Assemblies
UL 10B Fire Tests of Door Assemblies
UL 10C Positive Pressure Fire Tests of Door Assemblies
UL 1784 Air Leakage Tests of Door Assemblies and Other Opening Protectives
ASTM E90 Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
ASTM E413 Classification for Rating Sound Insulation
ASTM E2074 Fire Tests of Door Assemblies, Including Positive Pressure Testing
IBC International Building Code, Chapters 7 and 10
ICC A117.1 Accessible and Usable Buildings and Facilities
40 CFR Part 770 Formaldehyde Standards for Composite Wood Products (TSCA Title VI)

3 Submittals

3.1 Action Submittals

3.1.1 The submittals listed below shall be reviewed and returned before any leaf is released for fabrication.
  • Product data for each door construction furnished, showing duty level, appearance grade, core, face material, edge construction, adhesive type, and the listing under which rated leaves are labeled
  • Wood door shop drawings listing every opening by mark with leaf size, thickness, construction, core, face, edge, finish, fire-protection rating, smoke-control listing, sound rating, lite and louver cutouts, undercut, and hardware preparations keyed to the hardware set
  • Lite and louver elevations for each leaf that receives a cutout, showing cutout size, location, and the listed kit where the leaf is rated
  • Veneer samples of the specified species, cut, and grade, in the size and quantity needed to judge color, figure, and matching
  • Finish samples on the specified veneer showing the stain, the finish system, and the sheen, where the leaves are factory finished
  • High-pressure decorative laminate and opaque face samples for each color and pattern scheduled
  • Flitch samples where continuous or blueprint matching is selected
Action Submittals Requiredcheckbox
☑ Product data by door construction
☑ Wood door shop drawings by opening mark
☐ Lite and louver elevations
☑ Veneer samples
☑ Factory finish samples
☐ Laminate and opaque face samples
☐ Flitch samples
3.1.2 The wood door shop drawings shall be reviewed together with the frame submittal and the hardware schedule, and the Contractor shall record on the shop drawings the hardware set assigned to each opening.

3.2 Informational Submittals

3.2.1 The Contractor shall submit the following for record, without waiting for return, before the corresponding work begins.
  • Fire door listing documentation from the listing laboratory for every rated leaf construction, including the positive-pressure category and the permitted lite area
  • Laboratory sound test report to ASTM E90 and ASTM E413 for each sound-rated leaf construction, identifying the seals and threshold in the tested assembly
  • Manufacturer's qualification records and current listings for the ratings required
  • Manufacturer's published storage, handling, acclimation, and field-finishing instructions
  • Certification of composite-wood emissions compliance and, where selected, chain-of-custody certificates
  • Third-party quality certification program records where a program is selected in the datasheet
Informational Submittals Requiredcheckbox
☑ Fire door listing documentation
☐ Laboratory sound test reports
☑ Manufacturer qualification and listing records
☑ Storage, handling, and finishing instructions
☑ Emissions and chain-of-custody certificates
☐ Quality certification program records

3.3 Closeout Submittals

3.3.1 The Contractor shall submit the following before final acceptance.
  • Executed manufacturer's warranty for each door construction, in the Owner's name
  • As-installed door schedule reflecting field changes, with final ratings, cutouts, and hardware preparations by opening mark
  • Care, cleaning, and refinishing instructions for each finish furnished
  • Flitch identification for every veneer-matched set, so that a future leaf can be matched
Closeout Submittals Requiredcheckbox
☑ Executed manufacturer's warranty
☑ As-installed door schedule
☑ Care and refinishing instructions
☐ Flitch identification record

4 Quality Assurance

4.1 Manufacturer Qualification

4.1.1 Wood doors shall be produced by a manufacturer that produces doors conforming to ANSI/WDMA I.S.1A or ANSI/WDMA I.S.6A, as applicable, as a regular part of its business and that submits records of comparable completed production.
4.1.2 All wood doors on the project shall be produced by one manufacturer unless the Architect accepts a second manufacturer in writing for a stated group of openings.
NOTE A second manufacturer within a transparent-finish set is the usual source of color and figure mismatch between leaves, because flitch selection, veneer grading, and finish chemistry are set per plant. One manufacturer also leaves the Owner one party to hold to the warranty. (4.1.3)
4.1.4 For every fire-protection rating required on the project, the manufacturer shall hold a current listing from a nationally recognized testing laboratory covering the leaf constructions, sizes, and cutouts to be furnished.

4.2 Quality Certification Program

4.2.1 Participation in a third-party quality certification program shall be as indicated in the datasheet.
Quality Certification Programselect
No third-party program required
AWI Quality Certification Program
WI Certified Compliance Program
WDMA Hallmark Certification Program
4.2.2 Where a program is selected, the manufacturer shall be a current participant in that program at the time of bid, and the leaves shall carry the program's label or certificate at delivery.
NOTE A certification program adds an inspection the Owner does not pay the Architect for: the program's inspector checks the leaves against the grade the project selected. It also narrows the bidder pool to participants and carries a project fee, so it is weighed against the size of the transparent-finish scope and the Owner's appetite for a dispute over grade. The AWI and WI programs certify against the Architectural Woodwork Standards; the WDMA program certifies against the WDMA industry standards. (4.2.3)

4.3 Opening Mock-Up

4.3.1 Where the datasheet requires a mock-up, the Contractor shall install it at a location acceptable to the Architect and shall not release production leaves of the mocked-up construction until the mock-up is accepted in writing.
Door Mock-Upselect
No mock-up required
One finished leaf of each transparent-finish construction
One complete opening with frame and hardware
One opening of each door construction used in the work
4.3.2 The mock-up shall demonstrate veneer color and figure, matching, finish sheen and film, edge appearance, and, where a complete opening is required, hardware fit and clearances.
4.3.3 An accepted mock-up may remain as part of the completed work where the Architect designates it in writing.
NOTE A single finished leaf settles the color and finish argument before a set of matched doors is cut from one flitch, when a rejected leaf costs one door. A complete opening additionally proves the fit of frame, hardware, and leaf, which is what a project buying separate packages most often gets wrong. (4.3.4)

5 Environmental and Service Conditions

5.1 Wood doors shall not be delivered to the site until the building is enclosed, wet work is complete and dry, and the permanent conditioning system or an equivalent temporary system is operating.
5.2 Wood doors shall be stored, installed, and kept in service within the relative humidity range stated below, with the upper limit as indicated in the datasheet and the lower limit not less than 25 percent.
Relative Humidity for Wood Door Storage and Installationrange
Not more than
%
455055607080
NOTE A wood door is a laminated panel whose core, crossbands, faces, and edges change dimension with moisture content at different rates. Delivered into a building that is still drying out, the layers move against one another, and the result is the warp and telegraphed core lines that appear months after the door is hung. Sustained humidity below 25 percent shrinks the faces and opens veneer checks; sustained humidity above the manufacturer's upper limit swells them. (5.3)
5.4 Leaves at openings exposed to weather, to washdown, or to sustained high humidity shall be of the exterior-service construction required under the Exterior Service Construction section of this standard.
5.5 Leaves at openings exposed to cart, bed, or trolley contact shall be furnished at the duty level the manufacturer confirms in writing for that service, and shall be prepared for the protection plates assigned by the hardware schedule.

6 Door Construction

6.1 Flush and Stile-and-Rail Construction

6.1.1 The project standard door construction shall be as indicated in the datasheet, and the door schedule governs any opening it assigns a different construction.
Door Constructionradio
● Flush
○ Stile and rail
NOTE A flush door is a bonded sandwich of core, crossband, and face, and its appearance is the face veneer or laminate. A stile-and-rail door is a frame of vertical stiles and horizontal rails joined around panels, glass, or louvers, and its appearance is the profile of those members. Flush construction is built to ANSI/WDMA I.S.1A, stile-and-rail construction to ANSI/WDMA I.S.6A, and the two are graded and listed under different rules, which is why the construction is named before anything else about the leaf is selected. (6.1.2)
6.1.3 Leaf width, leaf height, hand, and swing shall be as indicated on the door schedule.
6.1.4 Leaf thickness shall be as indicated in the datasheet unless a listed fire door assembly or an oversized leaf requires a greater thickness.
Leaf Thicknessrange
in
1.3751.752.25
6.1.5 Leaves 1-3/8 in. thick shall not be used at a fire-rated opening, at an opening carrying an exit device, or at an opening carrying a mortise lockset, because those preparations do not fit the reduced stile depth.
6.1.6 For leaves wider than 4 ft or taller than 8 ft, and for pairs wider than 8 ft overall, the Contractor shall obtain the manufacturer's written confirmation that the selected construction, core, and thickness carry the leaf at the scheduled size and remain within the manufacturer's published warranty.

6.2 Performance Duty Level

6.2.1 The performance duty level of wood doors shall be as indicated in the datasheet.
Performance Duty Levelselect
Standard Duty
Heavy Duty
Extra Heavy Duty
NOTE The WDMA industry standards grade performance by duty level, which sets the minimum results the construction must deliver under the WDMA test methods for cycle-slam, hinge loading, screw holding, and the related tests. Standard Duty serves openings cycled by a few people a day, Heavy Duty serves corridor, classroom, and office openings in continuous public use, and Extra Heavy Duty serves openings that are cycled continuously or struck by carts and equipment. The duty level is a performance decision and carries no appearance content, so the plainest face can be ordered at the highest duty level. (6.2.2)
6.2.3 The duty level selected shall apply to flush doors under ANSI/WDMA I.S.1A and to stile-and-rail doors under ANSI/WDMA I.S.6A.
6.2.4 Where an opening is scheduled for a higher duty level than the project standard, the door schedule governs that opening.

6.3 Appearance Grade

6.3.1 The appearance grade of wood doors shall be as indicated in the datasheet.
Appearance Gradeselect
Economy
Custom
Premium
6.3.2 The appearance grade governs the natural characteristics permitted in the face, the number and size of permitted repairs, the matching tolerances within and between leaves, and the finish quality, in accordance with Section 9 of the Architectural Woodwork Standards.
NOTE Economy grade admits the full natural character of the species and is bought where the doors are opaque-finished or the appearance is not a design element. Custom grade is the commercial baseline for transparent finishes. Premium grade tightens color and figure matching across the face and between leaves and is bought where a matched set of doors is part of the room's design, at a cost that rises with the species and the matching selected. (6.3.3)

6.4 Flush Door Core

6.4.1 The core of flush doors at openings that carry no fire-protection rating shall be as indicated in the datasheet.
Flush Door Core at Non-Rated Openingsselect
Particleboard, ANSI A208.1 LD-1
Particleboard, ANSI A208.1 LD-2
Structural composite lumber
Stave lumber
Agrifiber
Institutional hollow core
Lead sheet lining over a particleboard core
NOTE The core is the substrate every hardware screw lands in and the mass that sets the leaf's sound transmission class. Particleboard is the lowest-cost solid core and holds standard hardware through blocking or a screw-holding density; the LD-2 grade is denser and holds a screw better than LD-1. Structural composite lumber and stave lumber hold a screw anywhere on the leaf without blocking and resist the racking of a continuous hinge or an exit device chassis. Agrifiber is a particleboard analogue built from agricultural fiber and is selected for its material content. An institutional hollow core carries a continuous lattice rather than a solid slab and is bought where weight and cost govern and the hardware is light. A lead-lined core is a shielding product and is selected to the physicist's lead thickness. (6.4.2)
6.4.3 Flush doors at openings that carry a fire-protection rating shall be built on the core named in the manufacturer's listing for that rating period, and the datasheet selection above shall not override it.
6.4.4 Flush doors at openings that carry a sound rating shall be built on the core, edge construction, and face construction of the tested assembly that produced the scheduled rating.
6.4.5 Faces of flush doors shall be bonded to the core with a crossband between the face and the core, in not less than the ply construction required for the duty level by ANSI/WDMA I.S.1A.
6.4.6 Interior flush doors shall be bonded with a Type II adhesive, and flush doors furnished for exterior service shall be bonded with a Type I adhesive.

6.5 Stile-and-Rail Member Construction

6.5.1 The stile and rail construction of stile-and-rail doors shall be as indicated in the datasheet.
Stile and Rail Member Constructionselect
Solid lumber
Engineered, laminated core with a veneer face and edge
Finger-jointed lumber for an opaque finish
NOTE A solid lumber stile is one piece of the face species through its thickness, which lets the edge be worked and refinished without exposing another material, and which moves with humidity along its full width. An engineered stile is a laminated core faced and edged with the species, which holds flat in a wide or tall leaf and in a building whose humidity swings, and which cannot be planed past its veneer. A finger-jointed stile is built from short lengths and is bought for an opaque finish where the joints will be covered. (6.5.2)
6.5.3 The panel construction of stile-and-rail doors shall be as indicated in the datasheet.
Stile and Rail Panel Constructionselect
Solid lumber, glued up
Veneered engineered panel over a composite core
Medium density fiberboard for an opaque finish
NOTE A glued-up solid lumber panel shows one species through its profile and shrinks across its width, so it is set loose in the groove and is finished before assembly so that no unfinished line appears when it moves. A veneered engineered panel stays flat and holds its size, and its raised profile is a veneered edge rather than solid wood. A fiberboard panel is machined to profile from one piece and takes an opaque finish without telegraphing a joint. (6.5.4)
6.5.5 The panel style of stile-and-rail doors shall be as indicated in the datasheet.
Stile and Rail Panel Styleselect
Raised panel
Flat panel
Flat panel with applied bolection moulding
NOTE A raised panel is machined to a profile that stands out of the stile plane and is the traditional appearance. A flat panel sits in the groove with no profile and reads as a modern or a paint-grade door. A bolection moulding is applied over the joint between a flat panel and the stile and is bought where a heavier profile is wanted than the panel stock can be machined to. (6.5.6)
6.5.7 Panels shall be set in the stile and rail grooves free to move, and shall be finished on all faces and edges before assembly where the leaf is factory finished.
6.5.8 Stile and rail joints shall be of a type qualified by the manufacturer for the duty level selected, and the joint shall be glued and pinned, doweled, or mortised and tenoned in accordance with ANSI/WDMA I.S.6A.
6.5.9 The panel layout of each stile-and-rail leaf shall be as indicated on the door elevations.
6.5.10 Stile-and-rail doors at openings that carry a fire-protection rating shall be of a construction and panel make-up covered by the manufacturer's listing for the rating period.

6.6 Exterior Service Construction

6.6.1 Requirements in this article apply to leaves scheduled for exterior openings and to leaves at interior openings exposed to washdown or sustained high humidity.
6.6.2 Exterior-service leaves shall be of a construction the manufacturer identifies in writing for exterior service, bonded with a Type I adhesive, and faced with a veneer, laminate, or overlay the manufacturer identifies for exterior exposure.
6.6.3 Exterior-service stile-and-rail leaves and exterior-service flush leaves with a wood face shall receive a water-repellent preservative treatment in accordance with WDMA I.S.4 before finishing.
6.6.4 Exterior-service leaves shall be factory finished on all six surfaces, including the top and bottom edges and every cutout, or shall be sealed on all six surfaces before they leave the factory where the field applies the finish.
6.6.5 The Contractor shall confirm with the manufacturer in writing that the exposure at each exterior opening, including the overhang and the orientation, is within the conditions of the manufacturer's exterior warranty before the leaf is released for fabrication.
NOTE An interior door at an exterior opening delaminates and warps within a season, because an interior adhesive bond is water resistant and not waterproof, and because the face of a leaf in sun and the face in a conditioned room are at different moisture contents all year. Exterior wood door warranties are commonly conditioned on an overhang that keeps direct rain off the leaf, on a finish maintained on the manufacturer's schedule, and on a dark-color limit on faces in direct sun. (6.6.6)

7 Faces and Edges

7.1 Face Material

7.1.1 The face material of flush doors shall be as indicated in the datasheet.
Face Materialselect
Wood veneer
High-pressure decorative laminate
Medium density overlay for an opaque finish
Hardboard for an opaque finish
NOTE A wood veneer face is the only face that takes a transparent finish and is the face every appearance-grade and matching selection in this standard describes. A high-pressure decorative laminate face resists abrasion, impact, and cleaning chemicals better than a finished veneer, is bought where the door is washed or struck, and reads as a laminate rather than as wood. A medium density overlay is a resin-impregnated fiber face bonded to the crossband and is the opaque face that takes paint with the least grain telegraphing. A hardboard face is the lowest-cost opaque face and shows more texture through the paint. (7.1.2)
7.1.3 High-pressure decorative laminate faces shall conform to NEMA LD 3 in the general-purpose grade, in a thickness not less than 0.048 in.
7.1.4 Laminate and opaque face colors and patterns shall be as indicated on the finish schedule.

7.2 Veneer Species and Cut

7.2.1 The face veneer species shall be as indicated in the datasheet.
Face Veneer Speciesselect
Maple
Birch
Red oak
White oak
Cherry
Walnut
Mahogany
Ash
Beech
Sapele
Anigre
Bamboo
Reconstituted veneer
Paint-grade hardwood
Not applicable, non-veneer face
NOTE Species sets color, figure, hardness, and cost, and no species is the norm across projects. The close-grained species, maple, birch, cherry, and beech, take a stain evenly and show little pore; the open-grained species, the oaks, ash, walnut, mahogany, and sapele, show pore and figure and are filled where a flat film is wanted. Anigre and sapele are tropical species whose availability follows the flitch market, and reconstituted veneer is engineered from fast-growing species to a uniform color and figure that no natural flitch repeats. Paint-grade hardwood is a veneer face selected for an opaque finish where a veneered rather than an overlay face is wanted. (7.2.2)
7.2.3 The face veneer cut shall be as indicated in the datasheet.
Face Veneer Cutselect
Plain sliced
Quarter sliced
Rift cut
Rotary cut
Half-round sliced
NOTE The cut determines the figure. Plain slicing produces the cathedral figure most people picture when they think of a wood door and yields the widest leaves from a flitch. Quarter slicing produces a straight stripe and, in oak, shows the ray flake. Rift cutting suppresses that flake and is the cut selected for a straight-grained oak. Rotary cutting peels a continuous sheet with a wide, variegated figure that is difficult to match between leaves and is the lowest-cost cut. Half-round slicing lies between rotary and plain slicing in figure. (7.2.4)
7.2.5 The face veneer grade shall be the ANSI/HPVA HP-1 grade that the Architectural Woodwork Standards assign to the selected appearance grade, unless a higher grade is selected in the datasheet.
Face Veneer Gradeselect
Grade AA
Grade A
Grade B
Derived — the appearance grade, per Section 9 of the Architectural Woodwork Standards (by default)
7.2.6 Face veneer thickness shall be not less than the thickness required by ANSI/WDMA I.S.1A for the cut and the duty level, so that the face can be sanded for finishing without cutting through to the crossband.

7.3 Veneer Matching

7.3.1 Veneer matching between adjacent leaves of veneer within each face shall be as indicated in the datasheet.
Veneer Match Between Adjacent Leaves of Veneerselect
Book match
Slip match
Random match
Pleasing match
NOTE Book matching turns alternate leaves of veneer over, so adjacent sheets mirror one another and the tight and loose faces alternate. Where a stain is applied, the alternating faces take it differently and produce a light-and-dark barber-pole effect, which is why slip matching, which lays the leaves in sequence without turning them, is selected where an even stain response matters more than symmetry. Random matching assembles leaves from several flitches for a deliberately varied face, and pleasing matching selects for color and figure without a repeating pattern. (7.3.2)
7.3.3 The arrangement of veneer leaves across each face shall be as indicated in the datasheet.
Veneer Assembly Across the Faceselect
Running match
Balance match
Center balance match
NOTE A running match uses the veneer leaves as they come, so the leaves at the two edges of the face may differ in width and one flitch yields the most doors. A balance match cuts every leaf on a face to the same width, so the face reads symmetrical and the flitch yield drops. A center balance match additionally places a joint on the centerline of the face, so a pair of doors reads as one composition, at the lowest yield of the three. The Architectural Woodwork Standards set the minimum arrangement for each appearance grade, and a project selects a tighter arrangement where the doors are a design element. (7.3.4)
7.3.5 Veneer matching between the leaves of a pair, among the doors of a set, and between doors and adjacent woodwork shall be as indicated in the datasheet.
Veneer Matching Between Leaves and With Adjacent Woodworkselect
No matching between leaves
Pair match
Pair and set match
Continuous match across a set from a single flitch
Blueprint match with adjacent wood paneling
NOTE A pair match makes the two leaves of one opening read as one face. A set match makes the doors in one room or corridor read as one color and figure family. A continuous match sequences every leaf in the set from one flitch in the order installed, marks each leaf for its opening, and holds the set to the flitch's yield. A blueprint match extends the sequence across the doors and the wood paneling of a room, so the doors are cut with the paneling by the woodwork fabricator, which is a coordination the schedule has to allow for. Each step up the list raises the cost and the flitch commitment, and the doors below the first step are matched only to the species and the cut. (7.3.6)
7.3.7 Where continuous or blueprint matching is selected, each leaf shall be marked on its top edge with its opening mark and its sequence in the flitch, and the marks shall remain legible through installation.
7.3.8 Where a set is selected for matching, the manufacturer shall record the flitch identification, and the Contractor shall include it in the closeout submittals.

7.4 Edge Construction

7.4.1 The vertical edge band of flush doors shall be as indicated in the datasheet.
Vertical Edge Bandselect
Hardwood, species compatible with the face veneer
Hardwood, species matching the face veneer
Hardwood, paint grade
High-pressure decorative laminate matching the face
Impact-resistant polymer edge
NOTE A compatible-species hardwood edge is a close-grained hardwood finished to read with the face and is the lowest-cost transparent-finish edge; a matching-species edge is the face species itself and is selected where the edge is seen with the door open. A paint-grade edge serves an opaque door. A laminate edge matches a laminate face and resists the abrasion a hardwood edge takes at a cart opening, and a polymer edge resists impact where the leaf is struck, at the cost of a visible material change at the face. (7.4.2)
7.4.3 Vertical edges shall be banded not less than 1/8 in. thick after machining, bonded to the core, and applied before the face so that no glue line shows on the face.
7.4.4 Top and bottom rails of flush doors shall be of a composite or hardwood material not less than 1-1/8 in. deep, bonded to the core.
7.4.5 The edge on a leaf receiving a mortise lockset, a mortise exit device, a continuous hinge, or a concealed closer shall provide solid material through the full depth of the preparation.
7.4.6 At fire-rated doors, the edge material, its thickness, and its attachment shall be those stated in the manufacturer's listing.
7.4.7 Where the leaf manufacturer's listing requires an intumescent edge seal, the seal shall be furnished with the leaf as the listing shows, concealed in the edge or applied to it as the positive-pressure category selected under the Fire-Rated Leaves section requires.

8 Fire-Rated and Smoke-Control Leaves

8.1 The Listed Leaf in the Listed Assembly

NOTE A fire door assembly is a specific combination of leaf, frame, hinges, latching hardware, closing device, gasketing, glazing, and glazing bead that was tested together and carries a label as that combination. The wood leaf is listed for a rating period, a maximum size, a maximum lite area, a hardware preparation envelope, and an edge seal category, and it holds its rating only in an assembly whose other components are within their own listings. (8.1.1)
8.1.2 Every fire-rated leaf shall be listed by a nationally recognized testing laboratory in the construction, size, and cutout configuration to be furnished.
8.1.3 Every fire-rated leaf shall bear a permanent label applied at the factory by the listing laboratory or under its supervision, identifying the rating period and the test standard under which the leaf was listed.
8.1.4 Labels shall not be removed, painted over, covered, or defaced at any time during construction, and labels shall not be field applied or transferred between leaves.
8.1.5 Where a label is missing, illegible, or painted over at turnover, the Contractor shall obtain a field label from the listing laboratory or replace the leaf, at no cost to the Owner.
8.1.6 Fire door assemblies shall be installed and maintained in accordance with NFPA 80.
8.1.7 The Contractor shall not field modify a listed leaf, including cutting a lite or louver opening, adding a hinge, drilling a through-bolt, or applying a plate larger than the listing permits, without the written confirmation of the listing laboratory that the modification is within the listing.

8.2 Fire-Protection Rating

8.2.1 The fire-protection rating of the leaf at each opening shall be as indicated in the datasheet.
Fire-Protection Rating of the Leafrange
Not less than
min
20456090
Per drawings — the door schedule (deferred by default)
NOTE A rating of 0 minutes designates an opening that the building code does not require to be an opening protective. Wood doors are listed through 90 minutes; an opening that requires a 3-hour assembly is protected by a hollow metal leaf under Exterior Doors And FramesHollow Metal Doors and FramesResolves to the current adopted revision.sync/exterior-doors-and-frames. (8.2.2)
8.2.3 The Architect shall establish the required rating period for each opening from the fire-resistance-rated construction and the opening protective provisions of Adopted Building CodeAdopted Building CodeParameterEach project supplies its own value.adopted-building-code, and shall record it on the door schedule.
NOTE The code sets the rating an opening protective must carry from the rating of the assembly it penetrates, and the relationship is not one to one. A corridor opening in a 1-hour fire partition is protected by a 20-minute assembly, an opening in a 1-hour fire barrier by a 45-minute or 60-minute assembly depending on the barrier's use, and an opening in a 2-hour fire barrier by a 90-minute assembly, with the governing values in the opening protective tables of IBC Chapter 7. (8.2.4)
8.2.5 Leaves at the openings the door schedule identifies as requiring a transmitted temperature rise limit shall be listed to a maximum transmitted temperature rise of 450°F above ambient at 30 minutes of standard fire test exposure.

8.3 Positive-Pressure Edge Seal Category

8.3.1 Fire-rated leaves shall be listed on the basis of testing to UL 10C or NFPA 252 under the positive-pressure condition, and the leaf shall not be furnished on a listing to the neutral-pressure condition of UL 10B in place of a positive-pressure listing.
8.3.2 The positive-pressure edge seal category of fire-rated leaves shall be as indicated in the datasheet.
Positive-Pressure Edge Seal Categoryradio
○ Category A, intumescent seal concealed in the leaf edge
○ Category B, intumescent seal applied to the frame or the leaf edge
NOTE In a positive-pressure test the neutral plane is set low in the furnace, so hot gas pushes outward across most of the leaf's height for the whole test, and a wood leaf passes only with an intumescent material that expands to close the clearance. Category A conceals that material in the leaf edge, so the opening shows a clean edge and the seal is protected from paint and damage, at the leaf manufacturer's price. Category B applies it to the frame rabbet or the leaf edge as a surface-mounted strip, which lets the leaf be a standard listed construction and puts the seal where it is visible, can be painted over, and is furnished either with the leaf or under the gasketing in the hardware sets. The category is set once for the project so that the frame and hardware packages prepare for the same seal. (8.3.3)
8.3.4 Where Category B is selected, the Contractor shall record on the shop drawings whether the surface-applied seal is furnished with the leaf or under the hardware sets, so that each opening receives exactly one seal.
8.3.5 Intumescent seals shall be delivered and installed uncompressed, unpainted, and undamaged.

8.4 Smoke and Draft Control

8.4.1 Whether a smoke and draft control listing is required at each opening shall be as indicated in the datasheet.
Smoke and Draft Control Listingradio
○ Smoke and draft control listing required at this opening
○ Smoke and draft control listing not required at this opening
Per drawings — the door schedule (deferred by default)
8.4.2 Leaves at openings requiring smoke and draft control shall be part of an assembly complying with NFPA 105 and listed on the basis of air leakage testing to UL 1784, and shall bear the S label.
NOTE The smoke test is not a fire test. It measures air leakage through the assembly at ambient and elevated temperature, so a leaf can hold a 90-minute rating and still fail as a smoke barrier if the gasketing the listing names is absent. The gasketing itself is hardware under Door HardwareDoor HardwareResolves to the current adopted revision.sync/door-hardware; the leaf's obligation is to be a construction within an S-labeled listing. (8.4.3)

8.5 Lites and Louvers

8.5.1 Lite and louver cutout sizes and locations shall be as indicated on the door elevations.
8.5.2 Cutouts in fire-rated leaves shall be factory cut, shall not exceed the lite area and the louver size the leaf's listing permits for the rating period, and shall be located within the margins the listing requires from the leaf edges and the hardware preparations.
NOTE The building code's opening-protective table sets the ceiling on glazed area in a fire door: a 20-minute leaf with fire-protection-rated glazing may be glazed up to the full leaf, a 45-minute leaf up to 1,296 in², and a 60-minute or 90-minute leaf up to 100 in² unless the glazing is fire-resistance-rated. The leaf manufacturer's listing is commonly more restrictive than the table, particularly at 45 minutes and above, so a lite in a rated leaf is confirmed against the listing, not the table, before the opening is drawn. The glazing and the listed kit that holds it are governed by Fire Rated GlazingFire-Rated Glazing and FramingResolves to the current adopted revision.sync/fire-rated-glazing, and this standard furnishes the cutout to the kit's size. (8.5.3)
8.5.4 The lite bead or kit furnished with the leaf shall be as indicated in the datasheet.
Lite Bead or Kit Furnished With the Leafselect
Hardwood beads matching the face species
Hardwood beads, paint grade
Steel lite kit, factory primed
Metal lite kit, factory finished to a scheduled color
No bead furnished with the leaf, kit furnished with the glazing
NOTE A hardwood bead reads with the face and is the bead a non-rated transparent-finish door receives; at a rated opening it is limited to the leaves and lite areas the listing permits with a wood bead, which are commonly the 20-minute leaves and the smaller 45-minute lites. A steel or metal kit is the listed kit for the larger 45-minute lites, for 60-minute and 90-minute lites, and for any lite the listing requires it on, and it is furnished primed for field painting or factory finished to a color. Where the glazing package furnishes the listed kit, the leaf arrives with the cutout only, and the two packages have to agree on the cutout size. (8.5.5)
8.5.6 Lite beads and kits at rated leaves shall be the beads and kits named in the leaf's listing for the lite size furnished.
8.5.7 Louvers in non-rated leaves shall be wood louvers of the face species or of paint-grade hardwood, sightproof, and inserted in a factory cutout.

9 Sound-Rated Leaves

9.1 The sound transmission class required of the leaf at each opening shall be as indicated in the datasheet.
Sound Transmission Class of the Leaf Assemblyrange
Not less than
STC
253033353840455055
Per drawings — the door schedule (deferred by default)
9.2 Openings carrying no scheduled sound transmission class shall carry no acoustic requirement under this standard.
9.3 A sound-rated leaf shall be a construction that, with the perimeter seals, automatic door bottom, and threshold of its tested assembly, achieved the scheduled class in a test to ASTM E90 rated to ASTM E413.
NOTE The published rating of a leaf is the rating of a tested assembly, not of the slab. A standard solid-core leaf tests at roughly STC 30 with its seals and at far less without them, and the classes above about 40 are reached only with a purpose-built core and a seal set the manufacturer tested with that core. An opening is rated by its weakest path, so a leaf rated above the wall it sits in buys nothing. (9.4)
9.5 The acoustic seal set for sound-rated leaves shall be furnished as indicated in the datasheet.
Acoustic Seal Set for Sound-Rated Leavesradio
○ Furnished by the leaf manufacturer as the tested assembly
○ Furnished under the hardware sets to the tested assembly's description
NOTE A seal set furnished by the leaf manufacturer is the set that was in the test, and one party is answerable for the rating. A seal set furnished under the hardware sets lets the hardware consultant hold one gasketing line across the project and is workable where the test report describes the seals by product type well enough to match, which is the case through the middle classes and rarely above them. (9.6)
9.7 Where the seal set is furnished under the hardware sets, the Contractor shall submit the leaf manufacturer's written confirmation that the scheduled seals and threshold match the tested assembly before the hardware is procured.

10 Factory Finishing

10.1 Finish State at Delivery

10.1.1 The finish state of the leaves at delivery shall be as indicated in the datasheet.
Finish State at Deliveryselect
Unfinished, field finished under the painting work
Factory sealed, field topcoat under the painting work
Factory primed for a field-applied opaque finish
Factory-applied transparent finish
Factory-applied opaque finish
NOTE A factory finish is applied in a controlled booth and cured before the leaf reaches a jobsite, which produces a harder film and a more uniform sheen than a field finish, keeps finishing odor and dust out of the building, and takes the leaf off the painting critical path. It also fixes the color before the adjacent millwork is finished, so a factory-finished door and a field-finished frame or casing are reconciled by sample rather than in place, and it leaves field repair of a damaged face to a touch-up kit. A field finish is applied under Interior PaintingInterior PaintingResolves to the current adopted revision.sync/interior-painting or Exterior PaintingExterior Painting and CoatingsResolves to the current adopted revision.sync/exterior-painting, can be matched to the millwork in place, and costs the schedule the drying time. A factory seal with a field topcoat protects the leaf through delivery while leaving the color to the field. (10.1.2)
10.1.3 Leaves delivered unfinished or factory sealed shall be sealed on all six surfaces, including the top and bottom edges and every cutout, within the interval stated in the manufacturer's written instructions after the leaf is hung.
10.1.4 The top and bottom edges of every leaf shall be sealed before the leaf is installed, whether the leaf is factory finished or field finished.

10.2 Transparent Finish System

10.2.1 The factory-applied transparent finish system shall be as indicated in the datasheet.
Factory Transparent Finish Systemselect
Catalyzed lacquer
Conversion varnish
Catalyzed polyurethane
Water-based polyurethane or acrylic
Ultraviolet-cured polyurethane or acrylate
NOTE The Architectural Woodwork Standards describe the transparent systems by chemistry and rank them by film hardness, chemical resistance, and repairability. Catalyzed lacquer is the most repairable in place and the softest film. Conversion varnish and catalyzed polyurethane build a harder, more chemical-resistant film that is repaired by refinishing the face rather than by spot touch-up, and polyurethane is the system selected where cleaning agents are strong. Water-based systems carry the lowest solvent content and the least ambering over a light species. Ultraviolet-cured systems are cured on the line in seconds, build the hardest film, and are available only on faces the line can present to the lamp, which excludes most profiled stile-and-rail work. (10.2.2)
10.2.3 Stain color shall match the Architect's accepted finish sample on the specified species and cut.
10.2.4 The finish sheen shall be as indicated in the datasheet.
Finish Sheenselect
Flat
Satin
Semi-gloss
Gloss
NOTE Sheen is the measured specular gloss of the cured film. A flat sheen hides handling marks and finish repairs and shows the least figure; a gloss sheen shows every pore and every repair and is selected for a specific design effect. Satin and semi-gloss lie between, and a satin sheen on a door cleans without showing the cleaning. The Architectural Woodwork Standards state the gloss unit range each name denotes. (10.2.5)
10.2.6 Factory-applied opaque finishes shall be a catalyzed or ultraviolet-cured pigmented system in the color indicated on the finish schedule, with the sheen selected above.

10.3 Emissions and Sourcing

10.3.1 Particleboard, medium density fiberboard, and hardwood plywood in the leaves shall comply with the formaldehyde emission limits of 40 CFR Part 770, and the binder class shall be as indicated in the datasheet.
Composite Core and Crossband Binderselect
Standard binder, compliant with 40 CFR Part 770
No added urea formaldehyde
No added formaldehyde
NOTE Every composite wood product sold in the United States meets the federal emission limit, which is the standard binder. A no-added-urea-formaldehyde binder removes the resin that off-gasses most and is the class most green-building rating systems credit; it is a stock option at most plants. A no-added-formaldehyde binder removes phenolic resins as well, is selected where the Owner's indoor air program requires it, and narrows the core suppliers. (10.3.2)
10.3.3 Factory finishes shall comply with the volatile organic compound limit in force at the manufacturing location and with any project sustainability requirement stated in the Contract Documents.
10.3.4 Wood sourcing certification shall be as indicated in the datasheet.
Chain-of-Custody Certificationselect
Not required
Forest Stewardship Council certified
Sustainable Forestry Initiative or PEFC certified
NOTE A chain-of-custody certificate traces the wood in the leaf to a certified forest through every party that handled it, and it is the document a green-building rating system or an Owner's procurement policy asks for. The Forest Stewardship Council scheme is the one most rating systems credit and narrows the veneer sources for some species. The Sustainable Forestry Initiative and PEFC schemes are credited by some systems and are more widely available in North American hardwoods. Certification follows the species selected, so an uncommon species under a strict scheme is confirmed as available before it is scheduled. (10.3.5)
10.3.6 Where a certification is selected, the manufacturer shall hold a current chain-of-custody certificate under that scheme, and the certificate number shall appear on the invoice for the leaves.

11 Hardware Preparation and Blocking

11.1 Factory Machining

11.1.1 Hardware preparation of the leaves shall be as indicated in the datasheet.
Hardware Preparationradio
● Factory machined for all hardware
○ Factory machined for hinges and lock, field machined for surface hardware
○ Field machined from a blank leaf
NOTE Factory machining is cut to the hardware template on fixed tooling, so the preparation lands at the template dimension and the leaf arrives sealed at every cut. Field machining lets the hardware be settled after the leaves are ordered and is the only route for a leaf ordered before the hardware schedule exists, at the cost of jobsite accuracy and of unsealed cuts. Machining the hinge and lock at the factory and the surface hardware in the field is the compromise where the closers and plates are undecided at release. (11.1.2)
11.1.3 Fire-rated leaves shall be factory machined for all hardware within the preparation envelope of the leaf's listing, and field machining of a rated leaf shall be limited to the job-site preparations NFPA 80 permits.
11.1.4 Field machining shall be limited to non-rated leaves, and shall be performed to the hardware manufacturer's templates.
11.1.6 The Contractor shall furnish the manufacturer with the approved hardware templates before the leaves are released for machining, and the leaves shall be machined for the hardware set the hardware schedule assigns to each opening.

11.2 Blocking and Reinforcement

11.2.1 Leaves built on a particleboard, agrifiber, or hollow core shall be furnished with blocking at every hardware item fastened with screws into the core, in the sizes the manufacturer qualifies for the hardware.
11.2.2 Additional blocking shall be as indicated in the datasheet.
Additional Hardware Blockingcheckbox
☐ Lock blocks at both stiles
☐ Top rail blocking for a surface closer
☐ Bottom rail blocking for an automatic door bottom
☐ Mid-rail blocking for push and pull plates
☐ Blocking for future hardware at scheduled locations
NOTE Blocking is placed during lay-up and cannot be added once the faces are bonded. A structural composite lumber or stave lumber core holds a screw anywhere and needs none; a particleboard core holds standard hardware through the blocking the clause above requires, and the additional blocking is bought where the hardware schedule places a closer on the top rail, a door bottom on the bottom rail, or a plate mid-height, or where the Owner expects to add hardware later. (11.2.3)
11.2.4 Where blocking for future hardware is selected, its locations shall be as indicated on the door schedule.

11.3 Electrified Hardware Raceway

11.3.1 Leaves scheduled for electrified hardware shall be furnished with a factory-installed raceway and pull wire from the hinge preparation to each electrified device preparation, within the leaf's listing at rated openings.
11.3.2 Raceway for electrified hardware shall be located so that the conductors of the power transfer hinge or the electric power transfer reach the device without passing through a lite cutout, a louver, or a lock block.
NOTE The raceway is drilled through the core before the faces are bonded, which is why an electrified opening added after release means a surface-mounted conduit on the face or a new leaf. The power transfer, the electrified device, and its power supply are governed by Door HardwareDoor HardwareResolves to the current adopted revision.sync/door-hardware and Access Control SystemsAccess Control SystemsResolves to the current adopted revision.sync/access-control-systems; the leaf's obligation is the raceway. (11.3.3)

11.4 Astragals and Undercuts

11.4.1 Pairs of leaves shall be furnished with the astragal or meeting-edge profile the door schedule assigns, and at rated pairs the astragal shall be the profile, material, and attachment stated in the listing.
11.4.2 Undercut at the bottom of each leaf shall be as indicated on the door schedule, and at fire-rated leaves the clearance to the top of the floor covering shall not exceed 3/4 in. as NFPA 80 requires.

12 Testing

12.1 Flush doors shall be qualified at the selected duty level by the WDMA test methods ANSI/WDMA I.S.1A assigns to that level, including cycle-slam to WDMA T.M. 6, hinge loading to WDMA T.M. 7, and screw holding to WDMA T.M. 10.
12.2 Stile-and-rail doors shall be qualified at the selected duty level by the test methods ANSI/WDMA I.S.6A assigns to that level.
NOTE The duty level fixes the test values. Each duty level in the WDMA industry standards is defined by a minimum result under each test method, so the cycle count, the hinge load, and the screw-holding force follow from the level selected and are not separate selections. (12.3)
12.4 Fire-rated leaves shall be qualified by the listing laboratory's test to UL 10C, NFPA 252, or ASTM E2074 under the positive-pressure condition, and the listing shall cover the leaf as furnished.
12.5 Sound-rated leaves shall be qualified by the ASTM E90 laboratory test, rated to ASTM E413, of the assembly furnished.
12.6 Installed leaves shall be checked for warp, telegraphing, and squareness against the tolerances of ANSI/WDMA I.S.1A or ANSI/WDMA I.S.6A, and a leaf outside tolerance shall be replaced.
NOTE Warp is measured as the deviation of the face from a straightedge laid across the diagonals, telegraphing as the deviation of the face from a short straightedge laid across a core line, and squareness as the difference between the diagonals. The WDMA standards state the permitted values for each leaf size, and the values are the basis on which the manufacturer's flatness warranty is adjudicated. (12.7)
12.8 Fire-rated openings shall receive the acceptance test NFPA 80 requires after installation, and the Contractor shall correct any leaf that does not close and latch under its closer alone before the inspection is recorded.

13 Installation

13.1 Leaves shall not be installed until the frames are set plumb, square, and anchored, and the Contractor shall report to the Architect any frame that is not within the frame standard's tolerances before hanging a leaf in it.
13.2 Leaves shall be hung with the hinges, pivots, and closers the hardware schedule assigns, and shall swing freely and latch positively without binding at any point of travel.
13.3 Clearances between the leaf and the frame at the head and the jambs shall be 1/8 in., and clearance between the leaves of a pair shall be 1/8 in., each within a tolerance of 1/16 in., unless the leaf's listing or the hardware schedule requires otherwise.
13.4 Fire-rated leaves shall be installed to the clearances and with the components of their listing, in accordance with NFPA 80, and self-closing leaves shall close and latch under the action of the closer alone.
13.5 Field trimming shall be limited to the manufacturer's published allowance at each edge, and fire-rated leaves shall not be trimmed beyond the allowance stated in the listing.
NOTE The trim allowance protects the stile and rail depth that the hardware preparations and the edge seal rely on. A leaf that cannot be fitted within its allowance is the wrong size for the opening, and the remedy is a replacement leaf rather than a deeper cut. (13.6)
13.7 Edges exposed by field trimming or field machining shall be sealed before the leaf is hung, with the manufacturer's touch-up material at factory-finished leaves.
13.8 Leaves at accessible openings shall be hung so that the clear opening width and the maneuvering clearances required by ICC A117.1 are provided with the hardware in place.
13.9 Installed leaves shall be adjusted after the hardware is set, and a warped, delaminated, or face-damaged leaf shall be replaced rather than repaired in the field.
NOTE A planed-down, patched, or re-veneered leaf is outside the manufacturer's warranty and outside the appearance grade the project bought, and a face repair on a transparent finish is visible under every lighting condition the Owner will see it in. (13.10)

14 Delivery, Storage, and Handling

14.1 Leaves shall be delivered in the manufacturer's protective wrap, marked with the opening mark on the top edge, and shall not be delivered before the conditions stated under Environmental and Service Conditions are met.
14.2 Leaves shall be stored flat on a level surface, on not less than three full-width supports, in a dry conditioned space, with the top leaf covered by an opaque protective sheet, and shall not be stood on edge or leaned against a wall.
NOTE Storing a leaf on edge or on uneven supports induces a set that becomes permanent warp, and sunlight through a window on a stacked transparent-finish leaf changes its color against the leaf beneath it. (14.3)
14.4 Leaves shall be handled with clean gloves, shall not be dragged across one another, and shall be carried rather than slid into the opening.
14.5 The protective wrap shall remain on each leaf until the leaf is ready to be fitted, and factory-finished leaves shall be protected from other trades until final acceptance.

15 Warranty

15.1 The manufacturer shall warrant the leaves against defects in materials and workmanship, against delamination, and against warp exceeding the tolerance of ANSI/WDMA I.S.1A or ANSI/WDMA I.S.6A, for not less than the period indicated in the datasheet.
Manufacturer Warranty Periodrange
Not less than
yr
123510
15.2 Where the manufacturer publishes a longer warranty or a life-of-installation warranty for the construction furnished, that longer warranty shall apply in addition to the period indicated in the datasheet and shall not be waived by it.
NOTE The datasheet period is the enforceable floor for every construction on the project. Solid-core interior flush doors are commonly warranted for the life of the installation, hollow-core, stile-and-rail, and exterior-service leaves for shorter published terms, and the floor is set so that the shortest published term on the project is still a term the Owner accepted. (15.3)
15.4 The warranty shall cover the replacement of a defective leaf, including its finishing to match the adjacent leaves and its hanging with the hardware of the opening.
15.5 A warranted replacement shall carry a fresh warranty of the original period running from the date of the replacement, or the unexpired remainder of the original period, whichever ends later.
15.6 The warranty shall not extend to damage caused by moisture exposure outside the manufacturer's stated storage and installation conditions, by physical abuse, or by field modification outside the limits the manufacturer allows.
15.7 The Contractor shall bear the cost of removing and reinstalling adjacent work that must be disturbed to make a warranty replacement, and the cost of repairing collateral damage caused by the replacement.

16 Attic Stock and Maintenance Materials

16.1 The Contractor shall deliver to the Owner before final acceptance the number of spare finished leaves indicated in the datasheet, matched to the project's most numerous transparent-finish construction and machined for its hardware set.
Attic Stock, Spare Finished Leavesrange
leaves
020
NOTE A spare leaf cut from the project's flitch and finished with the project's doors lets the Owner replace a damaged leaf without re-matching, which a leaf ordered years later from another flitch will not do. The quantity follows the number of identical transparent-finish openings and the Owner's tolerance for a mismatched door in a matched set. (16.2)
16.3 The maintenance materials indicated in the datasheet shall be delivered with the attic stock, in labeled packaging identifying the construction and finish they serve.
Maintenance Materialscheckbox
☑ Touch-up finish kit for each factory finish
☐ Spare lite beads of each type furnished
☐ Spare louvers of each type furnished
16.4 The Contractor shall obtain a signed receipt from the Owner for the attic stock and maintenance materials delivered, and shall include the receipt in the closeout submittals.

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