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Mule-Hide DensDeck Roof Board, Primed and Unprimed Gypsum, 4 ft x 4 ft and 4 ft x 8 ft Sheets
Regular price $35.33Orders start at $399 — combine any items to reach the minimum. Learn more
Mule-Hide DensDeck Roof Board, Primed and Unprimed Gypsum, 4 ft x 4 ft and 4 ft x 8 ft Sheets
This is the Mule-Hide DensDeck roof board line, gypsum cover board sold per sheet in four variants: 1/4 in. unprimed 4 ft x 8 ft, and 1/2 in. and 5/8 in. primed boards in 4 ft x 4 ft and 4 ft x 8 ft formats. Installed over insulation and under the membrane, DensDeck adds a protective, uniform substrate to low-slope roof assemblies. Choose thickness and sheet size to match the roofing detail.
Key Features:
- Gypsum cover board: DensDeck gypsum board creates a protective layer between insulation and roof membrane.
- Four variants: Available as 1/4 in. unprimed 4 x 8 ft and 1/2 in. or 5/8 in. primed boards in 4 x 4 ft and 4 x 8 ft.
- Primed options: The 1/2 in. and 5/8 in. boards come primed for the system's application requirements.
- Two sheet sizes: Choose 4 x 4 ft sheets for staging and detail work or 4 x 8 ft sheets for broad field coverage.
- Sold per sheet: Order exactly the sheet count your takeoff requires.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | DensDeck |
| Sell unit | 1 sheet (size and thickness per selected variant) |
| Product line | Mule-Hide DensDeck Roof Board |
| Available sizes | 1/4 in. x 4 ft x 8 ft; 1/2 in. x 4 ft x 4 ft; 1/2 in. x 4 ft x 8 ft; 5/8 in. x 4 ft x 4 ft; 5/8 in. x 4 ft x 8 ft |
| Material | Gypsum |
| Dimensions | 4 ft x 4 ft or 4 ft x 8 ft sheets, 1/4 in., 1/2 in. or 5/8 in. thick |
| Finish / texture | Primed (1/2 in. and 5/8 in. variants); unprimed (1/4 in. variant) |
| Intended use | Roof cover board under low-slope membrane systems |
Coverage & How Much You Need:
A 4 ft x 8 ft sheet covers 32 sq ft and a 4 ft x 4 ft sheet covers 16 sq ft. Divide the roof area by the sheet size you select and add an allowance for waste and joints.
Fit and Compatibility:
Use under approved low-slope membrane systems over polyiso or other approved insulation. Fastening or adhesion follows the roofing system specification; fasteners, adhesive and membrane are sold separately.
Frequently Asked Questions (FAQ):
Q: What sheet sizes and thicknesses are offered?
A: 1/4 in. unprimed in 4 x 8 ft, and primed 1/2 in. and 5/8 in. boards in both 4 x 4 ft and 4 x 8 ft sheet sizes.
Q: How much does one sheet cover?
A: A 4 x 8 ft sheet covers 32 sq ft and a 4 x 4 ft sheet covers 16 sq ft.
Q: Why choose a primed board?
A: The 1/2 in. and 5/8 in. variants are supplied primed per their product designation; select the variant your roofing detail specifies.
Q: Where does the cover board go in the assembly?
A: It is installed over the insulation and directly under the roof membrane.
Q: How is it fastened?
A: Attachment is per the roofing system manufacturer's specification; no fasteners are included.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Thicker cover board pays off in high-traffic or mechanically abused roofs, while the 1/4 in. board suits tight build-ups. Stagger cover board joints from insulation seams and use 4 x 4 ft sheets where staging space or complex detailing makes large boards awkward. Match the primed or unprimed variant to the adhesive or attachment method in the system spec.
Gypsum sheets are heavy with sharp edges; carry with a partner, wear gloves and eye protection, and keep boards flat and supported to prevent breakage.
Order Mule-Hide DensDeck roof board in the thickness, priming and sheet size your roofing system calls for.
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