Description
1/2 in. DensDeck gypsum roof cover board (4 ft. x 8 ft.)
Mule-Hide DensDeck is a rigid, glass-mat faced gypsum roof board used as a cover board, thermal barrier, or substrate in commercial low-slope roofing assemblies. Its noncombustible construction helps improve fire performance while adding durability and puncture/foot-traffic resistance over the roof deck.
Key Features:
- Commercial Roof Cover Board: Rigid gypsum roof board for use as a cover board, thermal barrier, or substrate board in low-slope roof systems.
- Durable Glass-Mat Faced Construction: Fiberglass mats bonded to a high-density gypsum core help resist job-site damage and deterioration versus paper-faced boards.
- Enhanced Puncture & Foot-Traffic Resistance: Helps protect roofing assemblies from maintenance traffic and dropped tools.
- Fire Performance: Noncombustible; tested to ASTM E84 with 0 flame spread and 0 smoke developed.
- Standard Sheet Size: 4 ft. x 8 ft. panel format for common commercial roofing layouts.
Specifications Table:
| Specification | Details |
|---|---|
| Product name | MH 1/2″ Densdeck 4X8 |
| Manufacturer SKU | 62MHDD1248 |
| Category | Insulation & Weatherproofing |
| Sub-category | Roof Cover Boards |
| Unit of measure | Sheet (SH) |
| Nominal thickness | 1/2 in (12.7 mm) |
| Nominal size | 4 ft x 8 ft |
| Length | 8 ft (2438 mm) ± 1/4 in (6.4 mm) |
| Width | 4 ft (1219 mm) ± 1/8 in (3 mm) |
| Item weight | 62.4 lb |
| R-value | 0.28 (°F·ft²·hr/BTU) (m²·K/W) |
| Compressive strength (nominal) | 900 psi |
| Flexural strength, parallel (min.) | 40 lbf (178 N) |
| Permeance | >50 perms (>2850 ng/Pa·s·m²) |
| Water absorption (max.) | <10% |
| Surface water absorption (nominal) | <2.5 grams |
| Humidified deflection | ≤1/8 in (3 mm) |
| Mold resistance | 10/10 |
| Flame spread/smoke developed (ASTM E84) | 0/0 |
| Flute spanability | 2-5/8 in (67 mm) |
| Bending radius | 5 ft (1524 mm) |
| Linear variation with change in temperature | 8.5 x 10^-6 in/in/°F (15.3 x 10^-6 mm/mm/°C) |
| Linear variation with change in moisture | 6.25 x 10^-6 |
| Applicable standards (as listed) | ASTM C1177; ASTM C473; ASTM E661; ASTM E96; ASTM C518 |
Frequently Asked Questions (FAQ):
Q: What is this board used for?
A: It’s used in commercial low-slope roof assemblies as a cover board, thermal barrier, or substrate board under roofing membranes.
Q: What are the panel dimensions and thickness?
A: This item is a 1/2 in. thick panel in a 4 ft. x 8 ft. sheet size.
Q: Is it fire-rated/noncombustible?
A: Yes—DensDeck is described as noncombustible and reports 0/0 (flame spread/smoke developed) when tested to ASTM E84.
Q: How durable is it for rooftop foot traffic?
A: It is designed to resist punctures from maintenance foot traffic and dropped tools and provides improved flute-spanning stiffness.
Q: How much does one sheet weigh?
A: A listed item weight is 62.4 lb per board (confirm handling requirements for your jobsite and system design).
A Quiet Backbone for High-Performance Rooflines
Think of this DensDeck panel as the invisible couture layer in a roof assembly—sleek, disciplined, and relentlessly hardworking. Its glass-mat faced gypsum body brings a refined resilience that stands up to traffic, tools, and time, while reinforcing the system beneath the membrane. Use it to elevate the performance of a low-slope roof with a clean, confident substrate that feels purpose-built and enduring. It’s the kind of foundational material that makes “luxury” feel effortless—because true luxury starts with what you don’t see.
Choose Mule-Hide 1/2 in. DensDeck 4×8 to add a tougher, more fire-conscious cover board layer to your commercial low-slope roofing assembly.
