Inverted Roof Insulation System

Inverted flat roof waterproofing combined with a thermal insulation is essential for a buildings waterproofing and energy saving thermal insulation.

Inverted roof insulation system.

In an irma the system s insulation is installed above the waterproofing membrane instead of below as in a conventional roof assembly. 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 systems are also referred to as upside down roof assembly. This makes it the only material suitable and approved for inverted roof applications.

Foamglas invatherm is a non combustible thermal insulation product designed to protect the waterproofing on inverted roofs. Used as part of established inverted roof systems it offers a euroclass a1 rating and a high compressive strength. Inverted roof membrane assembly irma can be constructed. Quantum is an innovative insulation system that can revolutionise a construction build.

The world s thinnest inverted roof insulation once in a while a british product is developed which is an industry game changer. 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. It is also protected from damage by traffic on the roof such as people walking the movement of equipment and so on. Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation.

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. Good insulation qualities and low thermal conductivity are required to ensure the low u value of the roof. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. 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.

The membrane is further protected by ballast overtop the insulation. Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast. An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation.