Lumber OSB Sheathing
LP Building Solutions LP FlameBlock Fire-Rated OSB Sheathing
LP FlameBlock fire-rated OSB sheathing — structural OSB with factory-applied fire-retardant treatment meeting Type X gypsum wallboard equivalent fire resistance for one-hour wall and roof assemblies. Reduces or eliminates gypsum board in some code-compliant assemblies. ICC-ES listed. Available in 7/16 in and 15/32 in thicknesses.
Material
Fire-retardant-treated OSB
Panel Size
4 ft × 8 ft
Fire Rating
1-hour assembly rating; Type X equivalent (per ICC-ES report)
Standard
PS-2; ICC-ES listed; ASTM E84 Class A flame spread
Applications
Fire-rated wall and roof assemblies
Distribution
Home Depot, Lowe's, LBM dealers
Model Comparison
2 models
| Specification | 7/16 in | 15/32 in |
|---|---|---|
| Model | — | — |
Shared Specifications
All models| material | Fire-retardant-treated OSB |
| panel_size | 4 ft × 8 ft |
| fire_rating | 1-hour assembly rating; Type X equivalent (per ICC-ES report) |
| standard | PS-2; ICC-ES listed; ASTM E84 Class A flame spread |
| applications | Fire-rated wall and roof assemblies |
| distribution | Home Depot, Lowe's, LBM dealers |