Skip to content
Johns Manville DuraBoard High-Density Perlite Roof Cover Board, 0.5 in. x 4 ft x 4 ft
Regular price $16.33Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville DuraBoard High-Density Perlite Roof Cover Board, 0.5 in. x 4 ft x 4 ft
This is a Johns Manville DuraBoard high-density, perlite-based roof cover board, 0.5 in. thick in a 4 ft x 4 ft panel, used as a hard protective layer over roof insulation beneath the membrane. One order unit is one panel covering 16 sq ft. It pairs with JM commercial roof insulation and membrane systems.
Key Features:
- High-density core: DuraBoard is the high-density perlite-based cover board in JM's insulation and cover board line.
- 0.5 in. thickness: The 0.5 in. thickness keeps roof build-up low while adding protection.
- 16 sq ft per panel: Each 4 ft x 4 ft panel covers 16 square feet of roof area.
- Code-listed: UL Classified, FM Approved, and Miami-Dade County Approved to ASTM C728, Type 2.
- Lightweight: At about 9 lb per panel, it is quick to stage and install.
- JM system fit: Made as an integral component of Johns Manville commercial roof systems.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 panel, 0.5 in. x 4 ft x 4 ft |
| Product line | DuraBoard High-Density Perlite Cover Board |
| Material | Perlite-based cover board |
| Dimensions | 4 ft x 4 ft, 0.5 in. thick |
| Thickness | 0.5 in. |
| Coverage per unit | 16 sq ft per panel |
| Weight | 9.01 lb per panel |
| Approvals | UL Classified; FM Approved; Miami-Dade County Approved; ASTM C728, Type 2 |
| Intended use | Commercial low-slope roofing cover board over insulation |
| Algae resistance | No |
Coverage & How Much You Need:
One 4 ft x 4 ft panel covers 16 square feet. Divide total roof area by 16 and add for cut waste around edges and penetrations.
Fit and Compatibility:
DuraBoard is installed over JM roof insulation beneath JM membrane systems. Attachment fasteners, plates, or adhesives are per the specified roof assembly and sold separately.
Frequently Asked Questions (FAQ):
Q: What comes in one order?
A: One 0.5 in. x 4 ft x 4 ft DuraBoard high-density perlite cover board panel.
Q: How many panels do I need per square?
A: Each panel covers 16 sq ft, so a roofing square requires about 6.25 panels plus waste allowance.
Q: How is it attached?
A: Install over insulation with fasteners and plates or approved adhesive per the specified JM roof assembly.
Q: What standards does it meet?
A: It is UL Classified, FM Approved, and Miami-Dade County Approved and conforms to ASTM C728, Type 2.
Q: When should I pick 0.5 in. versus thicker board?
A: Use 0.5 in. when the assembly specifies a lower profile cover board; confirm thickness against the project specification.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
The 0.5 in. DuraBoard suits assemblies where cover-board height must be minimized, such as at transitions and drainage-sensitive layouts. Stagger joints over insulation joints and follow the specified attachment pattern for your wind zone. High-density perlite gives better surface durability than standard perlite at a modest cost.
Panels are brittle at corners and edges; handle with gloves and lift with proper technique to avoid breaks and injury.
Add the Johns Manville DuraBoard 0.5 in. high-density perlite cover board to your roofing order 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.
