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Johns Manville FESCO 2 in. x 2 ft. x 4 ft. Perlite Roof Cover Board, 40 sq. ft. Bundle (5 Pieces)
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Johns Manville FESCO 2 in. x 2 ft. x 4 ft. Perlite Roof Cover Board, 40 sq. ft. Bundle (5 Pieces)
This is a bundle of five 2 in. thick, 2 ft x 4 ft Johns Manville FESCO perlite-based roof cover boards, covering 40 sq ft per bundle. FESCO is a rigid perlite cover board used under single-ply and other low-slope roofing membranes. It carries ASTM C728 Type 1 compliance with UL, FM and Miami-Dade listings.
Key Features:
- Perlite cover board: Rigid perlite-based cover board per ASTM C728, Type 1.
- 40 sq ft bundle: Bundle contains 5 pieces of 2 ft x 4 ft board for 40 sq ft of coverage.
- 2 in. thickness: Each board measures 2 in. thick.
- Code-listed: UL Classified, FM Approved and Miami-Dade County Approved.
- Membrane substrate: Provides a stable substrate under low-slope roofing membranes.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 bundle of 5 boards, 40 sq ft |
| Product line | FESCO perlite-based cover board |
| Material | Perlite-based cover board |
| Dimensions | 2 ft x 4 ft, 2 in. thick |
| Thickness | 2 in. |
| Coverage per unit | 40 sq ft per bundle (5 pieces x 8 sq ft) |
| Pack quantity | 5 pieces per bundle |
| Approvals | UL Classified; FM Approved; Miami Dade County Approved; ASTM C728, Type 1 |
| Weight | 14.8 lb per bundle (gross) |
| Intended use | Roof cover board under low-slope commercial roofing membranes |
Coverage & How Much You Need:
One bundle of five 2 ft x 4 ft boards covers 40 sq ft; order bundles to reach the roof area plus a small cutting allowance.
Fit and Compatibility:
Used as a cover board layer under Johns Manville single-ply and other low-slope roofing systems; attach per the specified membrane system requirements. Adhesive or fasteners are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One bundle of 5 boards, each 2 ft x 4 ft x 2 in. thick, for 40 sq ft total.
Q: How many bundles do I need?
A: Divide roof area by 40 sq ft per bundle and add an allowance for cuts and perimeter fitting.
Q: Is it code approved?
A: Yes: UL Classified, FM Approved, Miami-Dade County Approved, and it meets ASTM C728 Type 1.
Q: What attaches it to the deck?
A: Follow the specified JM membrane system attachment; adhesives and fasteners are sold separately.
Q: Can it be used as insulation?
A: Perlite board provides limited insulation value; it is primarily a cover board and is often installed over insulation.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
FESCO perlite board is a cost-effective cover board where fire performance and dimensional stability matter. Order 2 in. thickness where the system calls for a thicker board or added insulation contribution. Keep the boards dry before installation and cut with a fine-tooth saw for tight fits at penetrations.
Cutting perlite board generates dust: wear eye protection and a dust mask, and handle cut edges with gloves.
Order the Johns Manville FESCO 2 in. perlite cover board 40 sq ft bundle for your roofing assembly.
Product Documents:
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