Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Asphalt Shingle Roofing
…50 unchanged lines
| ASTM D4869 | Asphalt-Saturated Organic Felt Shingle Underlayment Used in Roofing |
| UL 790 / NFPA 256 | Standard Test Methods for Fire Tests of Roof Coverings |
−| IRC 2024, Section R905.2 | International Residential Code -- Asphalt Shingles |
−| IBC 2024, Section 1507.2 | International Building Code -- Asphalt Shingles |
+| IRC 2024, Section R905.2 | International Residential Code — Asphalt Shingles |
+| IBC 2024, Section 1507.2 | International Building Code — Asphalt Shingles |
| ARMA Steep-Slope Roofing Underlayments | Asphalt Roofing Manufacturers Association Technical Bulletin |
−| NRCA Steep-slope Roofing Manual | National Roofing Contractors Association -- current edition |
+| NRCA Steep-slope Roofing Manual | National Roofing Contractors Association — current edition |
# Submittals {toc}
…93 unchanged lines
type: radio
options:
− - Standard slope (≥ 4:12) -- single layer
− - Low slope (2:12 to < 4:12) -- doubled felt or full self-adhering
−default: Standard slope (≥ 4:12) -- single layer
+ - Standard slope (≥ 4:12) — single layer
+ - Low slope (2:12 to < 4:12) — doubled felt or full self-adhering
+default: Standard slope (≥ 4:12) — single layer
```
## Fire Resistance {toc}
−### The roof assembly -- deck, underlayment, and shingle together -- shall carry the specified fire classification tested to UL 790 / NFPA 256; the shingle product rating alone does not establish the assembly rating. {note}
+### The roof assembly — deck, underlayment, and shingle together — shall carry the specified fire classification tested to UL 790 / NFPA 256; the shingle product rating alone does not establish the assembly rating. {note}
### Class A is the most fire-resistant classification and is required for most occupancies under IBC Section 1505 and within wildland-urban interface zones; it is the default for commercial and institutional work.
…78 unchanged lines
### Where a cool-roof prescriptive path under an energy code is selected, solar-reflective shingles shall meet the listed initial and aged solar-reflectance index thresholds for steep-slope roofing.
−### Solar-reflective granule blends are an aesthetic and product-availability constraint; confirm the desired color exists in a compliant reflective blend before committing the selection. {note}
−
```datasheet
label: Cool-roof (solar-reflective) granules
…5 unchanged lines
```
+### Solar-reflective granule blends are an aesthetic and product-availability constraint; confirm the desired color exists in a compliant reflective blend before committing the selection. {note}
+
# Shingle Products {toc}
…4 unchanged lines
### Architectural (laminated) shingles shall be the minimum profile for commercial and institutional projects and for any project requiring a 30-year or greater service life.
−### All shingles shall comply with ASTM D3462, which prescribes minimum mass, tear resistance, nail pull-through, and pliability for glass-mat shingles.
−
−### Premium and designer profiles are typically special-order with a four to six week lead time; confirm availability and lead time before specifying them on a schedule-critical project. {note}
−
```datasheet
label: Shingle profile
…6 unchanged lines
```
+### All shingles shall comply with ASTM D3462, which prescribes minimum mass, tear resistance, nail pull-through, and pliability for glass-mat shingles.
+
```datasheet
label: Shingle weight
…6 unchanged lines
```
+### Premium and designer profiles are typically special-order with a four to six week lead time; confirm availability and lead time before specifying them on a schedule-critical project. {note}
+
+### The exposed color and granule blend of the shingle shall be specified, with lead time confirmed before a premium or designer profile is selected on a schedule-critical project.
+
```datasheet
label: Exposed color and granule blend
…22 unchanged lines
## Warranty Tier {toc}
−### Shingle warranties range from a fixed term (30, 40, or 50 year limited) to a limited-lifetime tier; the tier selected shall match the project's required service life and the Owner's expectations. {note}
+### Shingle warranties range from a fixed term (30, 40, or 50 year limited) to a limited-lifetime tier; the tier selected shall match the project's required service life and the Owner's expectations.
### A manufacturer system warranty (covering the full installed assembly) requires that every component and the installation method conform to the manufacturer's listed system; a shingle-only warranty does not.
…25 unchanged lines
### Underlayment options are No. 15 felt (ASTM D226 Type I), No. 30 felt (ASTM D226 Type II), synthetic (ASTM D4869 Class II through IV), or fully self-adhering (ASTM D1970); synthetic Class III or IV is the modern default, largely displacing felt. {note}
−### Underlayment shall be a product listed by, or compatible with, the shingle manufacturer's warranted system; mixing an incompatible underlayment can void a system warranty. {note}
+### Underlayment shall be a product listed by, or compatible with, the shingle manufacturer's warranted system; mixing an incompatible underlayment can void a system warranty.
### Synthetic underlayment shall provide a slip-resistant walking surface meeting the manufacturer's published slip rating for the roof slope.
…43 unchanged lines
## Valley Method {toc}
−### The valley treatment -- open (exposed metal), closed-cut, or woven -- shall be specified, because each detail has different water-handling capacity and appearance; the sheet-metal valley flashing itself is specified under [[sync/sheet-metal-flashing-and-trim]]. {note}
+### The valley treatment — open (exposed metal), closed-cut, or woven — shall be specified, because each detail has different water-handling capacity and appearance; the sheet-metal valley flashing itself is specified under [[sync/sheet-metal-flashing-and-trim]].
### A self-adhering ice-and-water membrane shall underlie the valley regardless of the valley method selected.
…95 unchanged lines
## Exposure {toc}
−### Shingle exposure shall not exceed the manufacturer's published maximum -- typically 5-5/8 in. to 6 in. for architectural shingles and 5 in. for three-tab -- because excess exposure voids the wind warranty and reduces headlap. {note}
+### Shingle exposure shall not exceed the manufacturer's published maximum — typically 5-5/8 in. to 6 in. for architectural shingles and 5 in. for three-tab — because excess exposure voids the wind warranty and reduces headlap.
```datasheet
…9 unchanged lines
# Deck Preparation {toc}
−## The roof deck shall be inspected before underlayment is installed; the structural design and thickness of the deck are specified under [[sync/wood-sheathing]] and are not modified by this standard. {note}
+## The roof deck shall be inspected before underlayment is installed; the structural design and thickness of the deck are specified under [[sync/wood-sheathing]] and are not modified by this standard.
## The deck shall be a minimum 3/8 in. plywood (for staple-grade work) or 7/16 in. OSB for nail attachment, clean, dry, and free of protruding fasteners and surface deterioration.
…50 unchanged lines
## Self-adhering membranes shall be stored on end in a dry location and protected from freezing where the manufacturer so requires.
−## Material shall be stored so that bundles can be staged in installation sequence without double-handling that scuffs the granule surface. {note}
+## Material shall be stored so that bundles can be staged in installation sequence without double-handling that scuffs the granule surface.
# Warranty {toc}
…34 unchanged lines
## Spare material shall be from the same production run as the installed roof where practical, and shall be labeled with the product name, color, and date of installation. {note}