Inverted Membrane Roof

Inverted roof membrane assembly irma systems are used in applications where the membrane requires protection from site specific hazards.

Inverted membrane roof.

These systems are typically applied in conditions where there is extensive roof traffic or to protect from excessive weather conditions such as multiple hail events. Invented by dow in the late 1960 s an inverted roof system uses dupont styrofoam brand xps insulation to protect the membrane helping improve the performance and longevity of the entire roof system. Inverted roof systems are also referred to as upside down roof assembly. This makes it the only material suitable and approved for inverted roof applications.

Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast. Benefits of inverted roofs. Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation. Inverted roof membrance assembly irma systems are used in applications where the membrane requires protection from site specific hazards.

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. Whilst the inverted roof is a robust system the insulation layer does not benefit from the protection of the waterproofing membrane. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation.

It is therefore essential the insulation layer is rot proof and durable. These systems are typically applied in conditions where there is extensive roof traffic or to protect from excessive weather conditions such as multiple hail events. Good insulation qualities and low thermal conductivity are required to ensure the low u value of the roof. Inverted membrane roof systems.

An inverted roof also known sometimes as a protected membrane or pmr roof uses the same materials as a conventional roof but places insulation on the top of the membrane. In an inverted membrane system the coventional membrane arrangement is invereted or turned upside down.