Protected Membrane Roof Assembly

A blue roof can be created on a typical hydrotech pmr protected membrane roof assembly utilizing standard loose stone for ballast.

Protected membrane roof assembly.

This is done as the membrane is being installed so that a good bond is attained between them. 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. Using standard ballast stone the water in the blue roof is stored within the void spaces of the stone and to the required level above the ballast. Filter mats specified must meet the insulation membrane manufacturer s specifications.

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. The natural water resistance of foamular eps and xps minimizes water absorption preserving r value. Carried vertically up a wall or parapet membrane flashing must extend up the vertical plane and above the finished roof waterproofing surface at least 200 mm 8 and must extend onto the roof field at least 100 mm 4 greater if required by the membrane manufacturer. 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.

In a conventional roof assembly the roof membrane is on top of the insulation where it is subject to many. 3 cap membrane field. It is the simplest blue roof that can be created. With such roofs the membrane s temperature range and rate of temperature change are drastically reduced.