Protected Membrane Roofs

By overlaying the membrane with opaque ballast and thermal insulation the membrane is protected against accelerated oxidation evaporation of volatile oils ultraviolet degradation of organic materials such as bitumen thermal movement expansion and contraction blistering ridging and stress concentration over insulation joints.

Protected membrane roofs.

A protected membrane roof is a roof where thermal insulation or another material is located. This is done as the membrane is being installed so that a good bond is attained between them. Grass or turf roofs have been around since the viking times if not far earlier and make for a decorative. This arrangement of roofing materials roof deck waterproofing membrane moisture resistant insulation is commonly referred to today as the protected membrane roof pmr or insulated roof membrane assembly irma.

Protected membrane roofing insulation technology has evolved over the decades and some types like rigid extruded polystyrene foam xps is highly water resistant. With such roofs the membrane s temperature range and rate of temperature change are drastically reduced. This insulation can be placed above the roof membrane protecting the membrane from elements while continuing to deliver thermal efficiency. Flat roof developments protected membrane roof.

Protected membrane roof systems.