Inverted Roof Membrane Assembly (IRMA) concrete roof, insulated externally with a moisture resistant high compressive strength XPS insulation that serves to protect the membrane from UV exposure and maintains the roof slab at a stable indoor temperature. The insulation is weighted down by a green roof above a drainage layer with integrated geotextile to manage rainwater above the insulation layer. Primary drainage is above the insulation layer, but this system can include a protection and backup drainage layer under the insulation if required.

ProctorGeo D-Rain DC8 Plus is a dimpled HDPE sheet pre-bonded to a 100gsm non-woven geotextile preventing soil particles from blocking drainage.

DCT GA 300 is a closed cell high compressive strength, low moisture absorption extruded polystyrene (XPS) general application board for insulating roofs, walls and floors in commercial and residential applications.