Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Concrete Construction Joints and Waterstops
…90 unchanged lines
```
−### Waterstop product data, material certifications, and the coordinated waterstop layout shop drawings are submitted under [[sync/concrete-accessories]] and shall be cross-referenced on the joint layout drawings rather than duplicated here. {note}
+### Waterstop product data, material certifications, and the coordinated waterstop layout shop drawings are submitted under [[sync/concrete-accessories]] and shall be cross-referenced on the joint layout drawings rather than duplicated here.
## Informational Submittals {toc}
…165 unchanged lines
### PVC is the standard waterstop material for clean-water service and is economical, weldable, and widely available. Rubber (neoprene or EPDM) is selected for aggressive chemical exposure and for water- and wastewater-treatment plants. A hydrophilic swelling strip is selected where welding is impractical - most often blind-side or post-pour joints with restricted access - because it requires no field splice. {note}
+### The waterstop material shall be specified for each joint based on the chemical exposure and field-splice accessibility of the joint.
+
```datasheet
label: Waterstop material
…19 unchanged lines
### Profile geometry follows the joint function. A centerbulb accommodates movement at expansion (and high-movement contraction) joints; a flat-web or ribbed profile, having no movement capacity, is correct at non-moving construction joints. A split-web or re-entrant profile is used where concrete is placed against existing concrete on one side only - blind-side or post-pour conditions. An external surface-mounted profile is a retrofit applied to a formed face where an internal waterstop was omitted or damaged. {note}
+### Specifying a centerbulb where no movement occurs wastes material, and specifying a flat-web where differential settlement or thermal expansion occurs creates a leak path; the profile shall match the joint's movement class in every case.
+
```datasheet
label: Waterstop profile geometry
…7 unchanged lines
```
−### Specifying a centerbulb where no movement occurs wastes material, and specifying a flat-web where differential settlement or thermal expansion occurs creates a leak path; the profile shall match the joint's movement class in every case. {note}
−
## Waterstop Width {toc}
…26 unchanged lines
### Specifying a non-buffered hydrophilic strip where the concrete will be permanently wet before the second pour causes premature swelling that fills the expansion capacity before the joint is sealed; the delayed-swell grade exists specifically to prevent this failure. {note}
+### Where a hydrophilic strip is specified, its cross-section dimensions shall be specified based on the design hydrostatic pressure at the joint.
+
```datasheet
label: Hydrophilic strip cross-section
…22 unchanged lines
### Preformed filler at expansion and isolation joints shall conform to ASTM D1751 or ASTM D1752 as appropriate to the application.
−### Where the joint receives a field-applied surface sealant, the filler shall be compressible and shall allow the joint to close through its full movement range.
−
−### Leaving a rigid filler in place at a sealed expansion joint prevents the joint from compressing, so the joint cannot accommodate movement and the waterstop buckles. Filler at sealed joints is specified as compressible and removable to the sealant depth for exactly this reason. {note}
−
```datasheet
label: Preformed filler material
…7 unchanged lines
```
+### Where the joint receives a field-applied surface sealant, the filler shall be compressible and shall allow the joint to close through its full movement range.
+
+### Leaving a rigid filler in place at a sealed expansion joint prevents the joint from compressing, so the joint cannot accommodate movement and the waterstop buckles. Filler at sealed joints is specified as compressible and removable to the sealant depth for exactly this reason. {note}
+
+### The preformed joint filler thickness shall be specified for each expansion or isolation joint based on the joint's required movement range.
+
```datasheet
label: Joint filler thickness
…121 unchanged lines
## The Contractor shall repair any joint leakage discovered within the warranty period at no cost to the Owner, including restoration of finishes disturbed by the repair.