However thermal efficiency may be increased by the use of multiple layers of flintboard.
Required thickness coverboard roof.
D annunzio is president of paragon roofing technology inc a construction engineering firm he founded in 1989.
5 8 thickness meets the requirements of type x per astm c 1177.
Fm class 1 for fire barrier requirements and ul class a unlimited slope with excellent surface burning characteristics.
He has published more than 100 articles and has written four books on building exterior issues.
1 4 6 4 mm 1 16 1 6 mm width standard.
He is the editorial director of architectural roofing waterproofing and a technical columnist for roofing contractor.
It provides exceptional bond and low absorption in adhered systems and offers sustainable design for all types of roofing systems including single ply fluid applied built up spray foam metal and modified bitumen roofing.
Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks.
Meets the requirements of astm c 1177.
The cover board also serves as a substrate for a vapor retarder in this application.
Table 1 12 4 30 year platinum tpo requirements.
Securock products are available in thicknesses of 3 8 and 5 8.
Densdeck roof boards are utilized in a wide variety of roofing systems for new and re roofing applications as gypsum roof cover boards and thermal barriers.
Coated fiberglass facer ideal for fully adhered systems provides a broader compatibility and higher performance with roofing adhesives.
When a coverboard in an approved assembly is used any thickness equal to or greater than 1 5 is acceptable.
Meets the requirements of astm c 1177.
Flame spread index of 75 and smoke development 450 meet code requirements for foam plastic roof insulation.
This significantly increases the time required to melt the insulation which adds fuel to the flames.
Physical properties listed above are presented as typical average values as determined by accepted astm test methods and are subject to normal manufacturing.
Codes exempt foam plastic insulation when used in fm 4450 or ul 1256.
5 8 thickness meets the requirements of type x per astm c 1177.
In this application the cover board provides a fire barrier in the case of an internal fire.
4 1219 mm 1 8 3 mm.
Over the roof deck.
Fm class 1 for fire barrier requirements and ul class a unlimited slope with excellent surface burning characteristics.
Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0.
