Channels permit drainage of water that seeps through to the roof membrane.
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Closed-cell extruded polystyrene (XPS) produced with a blowing agent blend for GWP of less than 50. Available with a minimum compressive strengths of 40, or 60 psi. It has high water resistance and R-value of 5.0 per inch of thickness. Drainage channels are cut along all 4 sides of the board at .5 inches deep and .25 inches wide. When placed facing down in a protected membrane roof assembly (PMRA), channels permit drainage of water that seeps through to the roof membrane.
Product Highlights
Blowing agent blend GWP of less than 50
For high-load applications - 40, and 60 psi
Retains its insulating properties over time
GreenGuard GG25-LG XPS Insulation Board
Low GWP formula Type IV XPS, min comp strength of 25 psi & 5 R-value/inchGreenGuard GG40-LG XPS Insulation Board
Low GWP formula Type VI XPS, min comp strength of 40 psi & 5 R-value/inchGreenGuard GG60-LG XPS Insulation Board
Low GWP formula Type VII XPS, min comp strength of 60 psi & 5 R-value/inch