Inverted Roof Insulation System

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.

Inverted roof insulation system.

One of the main benefits of the inverted roof method is that the membrane is protected by the insulation from the expansion and contraction caused by weather fluctuations such as frost and solar radiation. Quantum is an innovative insulation system that can revolutionise a construction build. It is therefore essential the insulation layer is rot proof and durable. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure.

Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast. Inverted flat roof waterproofing combined with a thermal insulation is essential for a buildings waterproofing and energy saving thermal insulation. Used as part of established inverted roof systems it offers a euroclass a1 rating and a high compressive strength. Inverted roof systems are also referred to as upside down roof assembly.

The world s thinnest inverted roof insulation once in a while a british product is developed which is an industry game changer. Whilst the inverted roof is a robust system the insulation layer does not benefit from the protection of the waterproofing membrane. The membrane is further protected by ballast overtop the insulation. Foamglas invatherm is a non combustible thermal insulation product designed to protect the waterproofing on inverted roofs.

Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation. Inverted roof membrane assembly irma can be constructed. 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. In an irma the system s insulation is installed above the waterproofing membrane instead of below as in a conventional roof assembly.

It is also protected from damage by traffic on the roof such as people walking the movement of equipment and so on. Good insulation qualities and low thermal conductivity are required to ensure the low u value of the roof. An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation.