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Johns Manville FESCO 0.75 in. x 4 ft. x 4 ft. Perlite Roof Cover Board, Sold per Piece
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Johns Manville FESCO 0.75 in. x 4 ft. x 4 ft. Perlite Roof Cover Board, Sold per Piece
This is a single 0.75 in. thick, 4 ft x 4 ft Johns Manville FESCO perlite-based roof cover board, sold per piece at 16 sq ft of coverage per board. FESCO provides a stable, code-listed substrate under low-slope roofing membranes. It meets ASTM C728 Type 1 and is UL Classified, FM Approved and Miami-Dade County Approved.
Key Features:
- Perlite cover board: Rigid perlite-based cover board per ASTM C728, Type 1.
- 16 sq ft per board: Each 4 ft x 4 ft board covers 16 sq ft.
- 3/4 in. thickness: Board measures 0.75 in. thick.
- Code-listed: UL Classified, FM Approved and Miami-Dade County Approved.
- Sold per piece: Order exact piece counts for repairs and small jobs.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 board, 4 ft x 4 ft x 0.75 in. |
| Product line | FESCO perlite-based cover board |
| Material | Perlite-based cover board |
| Dimensions | 4 ft x 4 ft, 0.75 in. thick |
| Thickness | 0.75 in. |
| Coverage per unit | 16 sq ft per board |
| Pack quantity | 1 piece |
| Approvals | UL Classified; FM Approved; Miami Dade County Approved; ASTM C728, Type 1 |
| Weight | 11.9 lb per board (gross) |
| Intended use | Roof cover board under low-slope commercial roofing membranes |
Coverage & How Much You Need:
One 4 ft x 4 ft board covers 16 sq ft; divide the roof area by 16 sq ft per board and add a cutting allowance.
Fit and Compatibility:
Installed under Johns Manville single-ply and other low-slope roofing systems as a cover board layer per the specified system requirements. Attachment adhesive and fasteners are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One 4 ft x 4 ft board, 0.75 in. thick, covering 16 sq ft.
Q: How many boards do I need?
A: Divide the roof area by 16 sq ft per board and add allowance for cuts.
Q: Why choose 3/4 in. thickness?
A: Use it where the specified system or budget calls for the thinnest standard FESCO cover board.
Q: Is it code approved?
A: Yes: UL Classified, FM Approved, Miami-Dade County Approved, meeting ASTM C728 Type 1.
Q: How is it attached?
A: Per the specified membrane system, using compatible adhesive or fasteners sold separately.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
The 3/4 in. board is the economical choice where a thin, fire-resistant cover board layer is specified. Handle it carefully because thinner perlite boards are more fragile at edges and corners. Lay boards with staggered joints and fit them tight at walls and penetrations.
Cutting perlite board creates dust: wear a dust mask and eye protection during cutting.
Order the Johns Manville FESCO 3/4 in. x 4 ft x 4 ft perlite cover board by the piece today.
Product Documents:
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