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
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
24 hrs. immersion |
5%
15% |
5%
14% |
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.