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Mule-Hide Poly ISO1-HD 1/2 in. Polyiso Roof Cover Board 4 ft. x 8 ft.
Regular price $45.00Orders start at $399 — combine any items to reach the minimum. Learn more
Mule-Hide Poly ISO1-HD 1/2 in. Polyiso Roof Cover Board 4 ft. x 8 ft.
This is Mule-Hide Poly ISO1-HD, a 1/2 inch high-density polyisocyanurate roof cover board in a 4 ft. x 8 ft. sheet. Each order unit is one sheet. It installs over polyiso insulation to provide a smooth, durable substrate for membrane roofing and pairs with single-ply or low-slope membrane systems.
Key Features:
- High density core: Poly ISO1-HD is a high-density polyisocyanurate cover board for demanding roof assemblies.
- 1/2 in. thickness: The listed variant is 1/2 in. thick, sized as a cover board layer over roof insulation.
- Full 4x8 sheet: Ships as a 4 ft. x 8 ft. sheet to cover large roof areas with fewer joints.
- Membrane substrate: Provides a suitable receiving surface for adhered or mechanically attached membrane roofing.
- Rigid insulation board: Rigid polyisocyanurate foam board classified under roof cover boards.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Mule-Hide Products |
| Sell unit | 1 sheet, 1/2 in. x 4 ft. x 8 ft. |
| Product line | MuleHide Poly ISO1-HD Roof Board |
| Available sizes | 1/2 in. x 4 ft. x 8 ft. sheet |
| Material | Polyisocyanurate foam |
| Thickness | 1/2 in. |
| Dimensions | 4 ft. x 8 ft. sheet |
| Nominal size | 1/2 in. x 4 ft. x 8 ft. |
| Intended use | Roof cover board over rigid insulation beneath membrane roofing |
| Pack quantity | 1 sheet |
Coverage & How Much You Need:
One 4 ft. x 8 ft. sheet covers 32 square feet before allowance for cuts and waste. Divide the roof area by 32 sq. ft. per sheet and add a waste factor for perimeter cuts.
Fit and Compatibility:
Designed to be installed over polyisocyanurate insulation boards and beneath single-ply or other low-slope membrane roofing. Boards are sold per sheet; fasteners or adhesives for attachment are ordered separately.
Frequently Asked Questions (FAQ):
Q: What size is each sheet?
A: The listed item is a 1/2 in. thick, 4 ft. x 8 ft. sheet of Poly ISO1-HD.
Q: What is a cover board for?
A: It sits over roof insulation to give the membrane a hard, smooth surface that improves puncture resistance and wind performance.
Q: How many sheets do I need?
A: One sheet covers 32 square feet; divide your roof area by 32 and add waste for perimeter and detail cuts.
Q: How is it attached?
A: Cover boards are typically adhered or mechanically fastened over insulation; attachment products are sold separately.
Q: Can it be used as primary insulation?
A: It is classified as a roof cover board; check the manufacturer's guidance for using it as the sole insulation layer.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
A high-density polyiso cover board like ISO1-HD is standard practice under single-ply membranes because it shields the insulation from foot traffic, hail, and wind uplift. Keep joints tight but not forced, stagger board joints from the insulation below, and adhere or fasten per the membrane manufacturer's specification. Order cover board at the same thickness the assembly was designed for; stepping thicknesses changes R-value and drainage.
Handle large rigid foam boards carefully on windy rooftops to prevent them from being lifted or broken, and follow fastening and fire-safety requirements for the roof assembly.
Order Mule-Hide Poly ISO1-HD 1/2 in. cover board sheets for a tougher membrane substrate.
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