Protected Membrane Roof System

Protected membrane roof pmr in a protected membrane roof also known as an inverted roof membrane assembly irma the insulation is installed on top of the membrane.

Protected membrane roof system.

The natural water resistance of. Epdm roofing has a longer lifespan than tpo while the pricing between the two membrane roofing systems is comparable epdm roofs generally have a longer lifespan. Epdm roofs are easy to repair and restore one of the most common roof types on the market epdm roofs are a natural fit for our highly effective conklin roof replacement systems. Also known as a protected membrane or upside down roof inverted roofs employ insulation which can resist water absorption provide excellent thermal performance be unaffected by freeze and thaw cycles withstand surface traffic and be protected from uv and mechanical damage among others.

Protected roof membrane assembly prma popular in green roofing systems the protected roof membrane assembly prma places the insulation layer above the waterproofing membrane an inversion of traditional roofing systems. 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. Tpo s long term heat uv and natural fungal resistance plus flexibility without need for plasticizers also make tpo a reliable low slope roofing system. Protected membrane roof systems.

Heat welded seams provide superior strength. The insulation may be exposed to water so it should have minimal water absorption characteristics. The insulation is protected from environmental extremes but is exposed to moisture. Extruded polystyrene xps is the most suitable type.

To complete the installation of the waterproofing roofing assembly the separation protection course is installed such as hydrotech s hydroflex 10 for roofing applications or hydroflex 30 for waterproofing applications. 06 13 2007 by richard l. By simply reversing the insulation and the waterproofing membrane insulation on top of the membrane rather than beneath the cause of many roofing problems can be eliminated. Short for thermoplastic polyolefin tpo is a single ply roofing membrane that offers excellent performance at a cost effective price.

This approach is commonly referred to as a insulated roof membrane assembly irma or protected membrane roof pmr.