Expansion Joint Curbs and Control Joint Curbs
Roof expansion joints are gaps that are designed into a commercial roof to allow for thermal expansion and contraction of a roof system (or roof and terminating wall). Pate Expansion Joint Curbs (EJ) are designed to prevent leaks across the expansion joint opening.
The primary purpose of a roof control joint is to separate roof areas, or divide areas into smaller sections to facilitate maintenance, or future roof replacement. Unlike an expansion joint, it is not intended to accommodate structural movement. Pate Control Joint Curbs (CJ) are designed to prevent leakage across the roof control joint.
Pate Expansion Joint Curbs (EJ) and Control Joint Curbs (CJ) construction:
- Heavy-gauge galvanized steel construction
- Internally reinforced
- Pressure-treated wood nailer
| Product Group | Description |
|---|---|
| EJ-2 (Submittal PDF) | Straight-sided curbs – most common – lightweight fill or tapered insulation |
| EJ-1 (Submittal PDF) | Canted design – 45-degree bend at base – single ply or rubber/PVC roof |
| EJ-5 (Submittal PDF) | Raised-cant design – 45-degree bend and elevated base – insulated roof deck |
| CJ-2 (Submittal PDF) | Straight-sided curbs – most common – lightweight fill or tapered insulation |
| CJ-1 (Submittal PDF) | Canted design – 45-degree bend at base – single ply or rubber/PVC roof |
| CJ-5 (Submittal PDF) | Raised-cant design – 45-degree bend and elevated base – insulated roof deck |
Options
- Fiberglass insulation
- Custom materials available: aluminum and stainless steel
- Special heights and pitches
- Fully mitered and welded corner sections
- Tees or cross sections
- Sloping end sections for termination points
