Protected Membrane Roof Building Science

Each 2 x 4 lightguard heavyguard or coolguard pmr insulation panel utilizes the superior.

Protected membrane roof building science.

Membrane roofing is a roof system that creates a continuous watertight covering to protect the interior of a building. For the newbies pmr stands for protected membrane roof and irma stands for inverted roof membrane assembly in these roofs the water control layer is not always. 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. The pmr system places the insulation on top of the mem brane protecting the roofing.

Protected membrane roofing insulation technology has evolved over the decades and some types like rigid extruded polystyrene foam xps is highly water resistant. Membrane roofs are predominately used as a flat roofing system since they are watertight which is critical where water is not shed immediately. A conventional roof system. Soviet era protected membrane roof pmr.

This insulation can be placed above the roof membrane protecting the membrane from elements while continuing to deliver thermal efficiency. Fully adhered alas directly on the structural deck and the thermal control layer and ballast are located above.