Protected Membrane Roof Assembly

The insulation is protected from environmental extremes but is exposed to moisture. 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. 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.

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In a conventional roof assembly the roof membrane is on top of the insulation where it is subject to many.

Protected membrane roof assembly.

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. 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. This is done as the membrane is being installed so that a good bond is attained between them. Protected and modified protected roof systems 1 general.

The natural water resistance of foamular eps and xps minimizes water absorption preserving r value. With such roofs the membrane s temperature range and rate of temperature change are drastically reduced. 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. It is the simplest blue roof that can be created.

A blue roof can be created on a typical hydrotech pmr protected membrane roof assembly utilizing standard loose stone for ballast. Pmr assembly blue roof. 3 cap membrane field. Filter mats specified must meet the insulation membrane manufacturer s specifications.

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