GAF DensDeck Prime Roof Board, 5/8 in x 4 ft x 8 ftDensDeck Prime Roof Board (5 8 in, 4x8) Commercial grade gypsum roof board with glass mat facings and a pre primed surface for stronger membrane adhesion. Designed to serve as fire, recovery, and thermal barrier while improving flute spanning and deck stability. Key Features: Pre Primed Surface: Enhances bond strength with roofing membranes for faster, reliable adhesion Durable Glass Mat Facings: Resists deterioration, delamination, warping, and job

DensDeck Prime Roof Board (5/8 in, 4x8)

Commercial-grade gypsum roof board with glass mat facings and a pre-primed surface for stronger membrane adhesion. Designed to serve as fire, recovery, and thermal barrier while improving flute spanning and deck stability.

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Key Features:

• Pre-Primed Surface: Enhances bond strength with roofing membranes for faster, reliable adhesion
• Durable Glass-Mat Facings: Resists deterioration, delamination, warping, and job-site damage
• Fire and Wind Performance: Provides excellent fire resistance and wind uplift properties
• Structural Support: Superior flute spanning helps stiffen and stabilize the roof deck
• Commercial Roofing Ready: Functions as fire barrier, recovery board, and thermal barrier across systems

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Specifications Table:

Specification	Details
Manufacturer Part Number	50D8
Product Number	GAF06DDP
Board Dimensions	4 ft x 8 ft
Thickness	5/8 in
Item Weight	80 lb
Style	Roofing Insulation
Construction	Glass mat facings with treated gypsum core
Surface	Pre-primed
Functions	Fire barrier, recovery board, thermal barrier
Performance	Superior flute spanning; improves deck stiffness and stability
Resistance	Moisture and water resistant; resists deterioration, delamination, warping, job-site damage
Standards/Approvals	ASTM C518; ASTM D3273; ASTM E84; ASTM E96; ASTM E119; ASTM E661; UL723; ASTM C578; ASTM C177; UL Class A; ULC S-102; FMRC Class 1; ULC 102; UL Classified; Florida Building Code Approved

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Frequently Asked Questions (FAQ):

Q: What are the board dimensions and thickness?
A: This variant is 4 ft x 8 ft with a 5/8 in thickness.

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Q: Is the surface pre-primed?
A: Yes, the board features a pre-primed surface to improve membrane adhesion.

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Q: What applications is this board suited for?
A: It serves as a fire barrier, recovery board, and thermal barrier in various commercial roofing systems.

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Q: How does it handle moisture?
A: The treated gypsum core and glass-mat facings provide water and moisture resistance.

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Q: What standards does it meet?
A: Listed standards include ASTM C518, D3273, E84, E96, E119, E661; UL723; ASTM C578, C177; UL Class A; ULC S-102; FMRC Class 1; ULC 102; UL Classified; Florida Building Code Approved.

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A Refined Backbone for High-Performance Roofs

This board brings quiet strength to the envelope—sleek, resilient, and impeccably engineered. The pre-primed, glass-mat surface is a subtle yet powerful detail that ensures a seamless bond under modern roofing membranes. Pair it with minimalist single-ply systems to create a clean, monolithic rooftop profile. It’s an essential layer for a polished, durable, and luxuriously reliable build.

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Choose DensDeck Prime to strengthen your roof assembly with superior adhesion, durability, and code-compliant performance.