Skip to content
Johns Manville FESCO 1 in. x 4 ft. x 4 ft. Perlite Roof Cover Board, Sold per Piece
Regular price $19.50Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville FESCO 1 in. x 4 ft. x 4 ft. Perlite Roof Cover Board, Sold per Piece
This is a single 1 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 is a rigid perlite cover board used under low-slope single-ply and other 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.
- 1 in. thickness: Board measures 1 in. thick.
- Code-listed: UL Classified, FM Approved and Miami-Dade County Approved.
- Sold per piece: Order exact piece counts for small jobs and repairs.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 board, 4 ft x 4 ft x 1 in. |
| Product line | FESCO perlite-based cover board |
| Material | Perlite-based cover board |
| Dimensions | 4 ft x 4 ft, 1 in. thick |
| Thickness | 1 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 | 14.7 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 to size the order and add a cutting allowance.
Fit and Compatibility:
Used under Johns Manville single-ply and other low-slope roofing systems as a cover board layer, installed over insulation or deck per the specified system. Attachment adhesive and fasteners are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One 4 ft x 4 ft board, 1 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 and perimeter waste.
Q: Can I order just a few boards?
A: Yes, this item is sold per piece, making it suitable for small jobs and repairs.
Q: Is it approved by code bodies?
A: Yes: UL Classified, FM Approved, Miami-Dade County Approved, meeting ASTM C728 Type 1.
Q: How is it installed?
A: It is installed per the specified membrane system with compatible adhesive or fasteners, sold separately.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
The 4 ft x 4 ft panel is convenient for hand-carry roof access and patch work. Use 1 in. thickness where the system specification calls for a standard cover board layer over polyiso or other insulation. Keep boards flat and dry on site, and stagger joints when laying multiple boards.
Cutting perlite board creates dust: wear a dust mask and eye protection and work on a stable surface.
Order the Johns Manville FESCO 1 in. x 4 ft x 4 ft perlite cover board by the piece today.
Product Documents:
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
