Materials:DensDeck Prime with EONIC Roof Board

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Materials:DensDeck Prime with EONIC Roof Board

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Notice to the Reader:

The roofing assembly / material information published in the RCABC Roofing Practices Manual and offered below does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.

Manufacturer: Georgia-Pacific Canada Ltd.
Accepted for RoofStar Guarantee Program
Date TBA
Product Summary

DensDeck is a water-resistant treated gypsum board manufactured with an embedded non structural fibreglass mat facer and a water-resistant treated core. DensDeck Prime Roof Guard is identical except that it has a treated surface to improve bonding.

DensDeck is an accepted insulation overlay board in the RoofStar Guarantee Program. DensDeck Prime Roof Guard is an accepted insulation overlay board for adhered roof assemblies in the RGC Program.

DensDeck and DensDeck Prime Roof Guard have achieved a very comprehensive Class A (UL 790) fire rating at Underwriters Laboratories due to their outstanding fire resistance.

  • ASTM E 84 with DensDeck and DensDeck Prime Roof Guard: Flame Spread 0, Smoke Developed 0
  • ASTM E 119 with 5/8" DensDeck Fireguard Type X Roof Guard: UL Classified Type DGG

Due to the outstanding fire performance of 5/8" DensDeck Fireguard Type X Roof Guard, this product can replace any generic Type X gypsum board in an assembly in the UL Fire Resistance Directory under the prefix “P”.

  • 5/8" DensDeck Fireguard Type X Roof Guard is classified by Underwriters Laboratories and can be used in the following UL “P” assemblies: P225, P227, P230, P232, P235, P254, P257, P259, P266, P508, P510, P512, P514, P518, P701, P713, P714, P717, P718, P719, P720, P722, P724, P725, P726, P727, P728, P729, P730, P731, P732, P733, P734, P735, P736, P738, P739, P740, P801, P803, P805, P811, P813, P814, P815, P818, P819, P824, P825, P826, P828, P921
  • UL of Canada R210, R217, R222, R223, R224, R702, R703, R705, R804, R806, R808
  • ANSI / UL 1256 Steiner Tunnel “Fire Classified Construction”. This listing allows direct application on steel decking with ¼", ½" or 5/8" DensDeck or DensDeck Prime Roof Guard under foamed plastic insulations.
Click below for the Technical Data Sheet (TBA).
Technical Data Sheet


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