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LP FlameBlock OSB Sheathing 4 ft. x 8 ft. Fire-Rated Panel
Regular price $133.34Orders start at $399 — combine any items to reach the minimum. Learn more
LP FlameBlock OSB Sheathing 4 ft. x 8 ft. Fire-Rated Panel
LP FlameBlock is a 4 ft. x 8 ft. OSB sheathing panel treated with a proprietary non-combustible, fiberglass-reinforced Pyrotite layer for flame-spread and burn-through resistance. Each sell unit is one panel. It is an ICC-approved component of 1- and 2-hour fire-rated wall assemblies and roof deck applications.
Key Features:
- Fire resistance: Combines flame-spread and burn-through resistance in a structural OSB panel.
- Rated assemblies: ICC-approved component of 1- and 2-hour fire-rated wall assemblies and roof deck applications.
- Pyrotite treatment: Proprietary non-combustible, fiberglass-reinforced Pyrotite treatment is bonded to the panel.
- Structural OSB core: Wood strands are oriented in cross-directional layers with waxes and resins for strength.
- Code compliance: Meets building code requirements for fire-resistant construction while increasing structural ratings.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | LP |
| Sell unit | 1 panel, 4 ft. x 8 ft. |
| Product line | LP FlameBlock |
| Nominal size | 4 ft. x 8 ft. |
| Material | OSB (oriented strand board) with Pyrotite treatment |
| Dimensions | 4 ft. x 8 ft. panel |
| Intended use | Fire-rated wall assemblies and roof deck sheathing |
| Approvals | ICC-approved component of 1- and 2-hour fire-rated wall assemblies |
| Pack quantity | 1 |
Coverage & How Much You Need:
One 4 ft. x 8 ft. panel covers 32 sq. ft. of wall or roof deck before waste; plan panel layout with edges bearing on framing per your assembly schedule.
Fit and Compatibility:
Designed for use in LP FlameBlock fire-rated wall and roof deck assemblies; fasteners, framing and adjoining membranes are sold separately. Confirm the specific assembly listing with your building official before substitution.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One 4 ft. x 8 ft. LP FlameBlock sheathing panel.
Q: How much area does one panel cover?
A: One panel covers 32 sq. ft. of wall or roof deck, less any cut waste and edge spacing.
Q: Why choose FlameBlock over standard OSB?
A: It adds flame-spread and burn-through resistance through a Pyrotite treatment and is an ICC-approved component of 1- and 2-hour fire-rated assemblies.
Q: Can it be used on the roof deck?
A: Yes, it is approved for use in fire-rated roof deck applications as well as wall assemblies.
Q: How is it installed?
A: Install like standard OSB sheathing over framing, following the fire-rated assembly details and your local code requirements.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Choose FlameBlock when the plan calls for fire-rated sheathing in walls or roof decks, since it substitutes for standard OSB while contributing to 1- and 2-hour assemblies. Keep panel edges supported and follow the listed assembly details exactly, as substituting fasteners or framing members can void the rating. Order panels by the square plus waste for fire-rated jobs so all sheathing on the assembly matches.
Follow the listed fire-rated assembly details and local building codes, and use fall protection when sheathing roof decks.
Order LP FlameBlock sheathing today and build fire-rated wall and roof assemblies with a single panel.
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