GreenGuard LG XPS Drainage Channel Insulation Board

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.

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