All roofing systems with membranes can be inverted. The waterproofing layer is put down first, with insulation boards laid on top. The result is a tough type of roof, ideal for commercial, industrial, and institutional applications subject to regular rooftop traffic, tall buildings subject to strong winds, and roofs that need to support the weight of heavy mechanical equipment.

Inverted roofs can be installed independently of ambient weather conditions, once the waterproof membrane is in place. This means that the components of the insulating layer are removable, which makes repairs easier and less expensive. Another advantage is the reduced thermal stress on the roof’s waterproofing layer in all seasons. Effective drainage systems are however important to keep the insulation boards from being submerged for long periods.