Easy to handle and install, GreenGuard GG300, GG500 & GG700 is a high performance rigid extruded polystyrene insulation, with high compressive strength and compatible with green roof systems. An ideal insulation for inverted roofs, basements, car park decks, and heavy duty commercial, industrial, and cold store flooring. It is a non-deleterious material and is resistant to the passage of water vapour.