Gypsum-fiber roof board, 3/8 in., 4x4

High-performance gypsum-fiber roof board for low-slope systems, engineered for strength and water resistance through the core. Delivers exceptional bond and low absorption for adhered roofs, with uniform composition for high wind-uplift ratings and no facer delamination.

Key Features:

• Core Strength & Water Resistance: Fiber-reinforced, uniform composition resists water through the core for long-term performance
• Superior Adhesion: Low absorption enhances bond in adhered roofing systems
• High Wind-Uplift Performance: Uniform construction helps achieve strong wind ratings without facer delamination
• Sustainable Composition: Made from 97% recycled material for eco-conscious builds
• Versatile Compatibility: Suitable for built-up, fluid-applied, spray foam, metal, and polyester-reinforced single-ply or modified bitumen systems

Please check the Product Data Sheet Here

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What are the board dimensions and thickness?
A: This variant is 4 ft x 4 ft with a 3/8 in (0.375 in) thickness.

Q: Is it approved to common industry standards?
A: Yes—ASTM C1177, ASTM D3273, FM Approved, Miami-Dade County Approved, and UL Classified.

Q: Can it be used under single-ply membranes?
A: Yes, it is compatible with polyester-reinforced single-ply and modified bitumen systems, as well as built-up, fluid-applied, spray foam, and metal roofs.

Q: Does the board resist moisture?
A: Its fiber-reinforced, uniform composition provides water resistance through the core and avoids facer delamination.

Q: Is this product environmentally friendly?
A: It is manufactured from 97% recycled material.

A Refined Foundation for Resilient Roofscapes

This gypsum‑fiber board sets a serene, architectural base—clean, minimal, and purposefully strong. The uniform, fiber-reinforced core is the quiet hero, delivering steadfast performance and water resistance beneath the beauty above. Pair it with sleek metal or single‑ply membranes to craft a streamlined silhouette. It’s an essential layer for luxurious, durable roofing design.

Choose SECUROCK Gypsum-Fiber Roof Board for a stronger, water-resistant, and sustainable foundation in your next low-slope roofing project.