Firestall® Roof Deck
Firestall® Roof Decking is a nailable Class "A" fire rated structural roof decking, made of multiple plies of Homasote structural board and a face ply of UL-listed N.C.F.R.® Homasote.®
It is designed for use as a structural, load-bearing decking in residential and commercial buildings that require a Class A (25 flame spread) rated decking.
Downloads
- Multi-Function Roofing Systems Brochure
- UL P-535 Architectural Drawings
- 3 Part Specifications
- Installation Instructions
- Roof Stripping Instructions
Advantages
- Can be applied over either steel or wood framing or structural steel deck
- Provides a nailbase surface to attach additional insulation, shingles and other finish roofing
Sizes & Weights (nominal), Thermal Resistance
| Thickness | Size | Weight | R Value |
|---|---|---|---|
| 1.0" | 2' x 8' | 2.62 lbs./sq.ft. | 2.05 |
| 1-3/8" | 2' x 8' | 3.48 lbs./sq.ft. | 2.5 |
| 1-7/8" | 2' x 8' | 4.63 lbs./sq.ft. | 3.1 |
NOTE: Finished T&G on long edges and square on ends.
Fire Resistance Ratings
| Method of Test | Class | Flame Spread | Smoke Developed |
|---|---|---|---|
| ASTM-E84 | A | 20 | 5 |
Load Table*
| Panel Thickness | Maximum Rafter Spacing for live loads of 50 PSF* |
|---|---|
| 1" | 24" |
| 1-3/8" | 32" |
| 1-7/8" | 48"-40" PSF |
* Calculations based on 2 or more continuous spans. 10 PSF dead load assumed.
Typical Physical Properties
| 440 Surface | NCFR Surface | |
|---|---|---|
| Density: | 26-28 lbs./ft. | 34-40 lbs./ft. |
| Tensile Strength: | 450-700 psi | 400-700 psi |
| Hardness, Janka Ball (min.): | 230 | 275 |
| Water Absorption by vol. (max.): 2 hrs. immersion |
7% |
7% |
| Expansion from 50%-90% Relative humidity (maximum) |
0.25% | 0.30% |
| Flame Spread (NCFR surface) | Class I (or A) | |
| Noise Reduction Coefficient | .20 |
Code Compliance
1992 BOCA National Building Code Section 2310.2, Fire retardant-Treated Wood.
