| Description PermaBase® DEK Roof Board is a 3/8" panel that is lightweight, easy to cut and fasten, and very durable in the presence of moisture. It will not rot, swell, or disintegrate in the presence of moisture. As an underlayment board or cover board for commercial, low slope roofs it provides excellent compressive strength, delamination resistance, and fungus resistance. It can be used in combination with a variety of roofing membranes and systems. Features/Benefits ■ Unaffected by prolonged exposure to moisture ■ Low water absorption ■ Scores and snaps easily and cleanly ■ Increases metal deck stiffness and roof system durability ■ Superior impact and puncture resistance due to high compressive strength ■ Fire Resistant ■ 3' x 6' sheets for ease of handling ■ Outperforms fiberboard, perlite, and glass mat faced gypsum boards in moisture protection and durability ■ Suitable for inverted roof assemblies with liquid membranes ■ Allows roof coverings to be mechanically fastened without sacrificing strength Meets CAN/ULC-S126-M86 standard. See assemblies C40 and C41 in the ULC database |