Inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation.
Inverted roof insulation system.
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Used as part of established inverted roof systems it offers a euroclass a1 rating and a high compressive strength.
Good insulation qualities and low thermal conductivity are required to ensure the low u value of the roof.
It is therefore essential the insulation layer is rot proof and durable.
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The membrane is further protected by ballast overtop the insulation.
It is also protected from damage by traffic on the roof such as people walking the movement of equipment and so on.
Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure.
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.
Inverted flat roof waterproofing combined with a thermal insulation is essential for a buildings waterproofing and energy saving thermal insulation.
Whilst the inverted roof is a robust system the insulation layer does not benefit from the protection of the waterproofing membrane.
Inverted roof membrane assembly irma can be constructed.
In an irma the system s insulation is installed above the waterproofing membrane instead of below as in a conventional roof assembly.
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.
Insulation boards are loose laid on top of the membrane and then weighted down with paving slabs or gravel ballast.
The mariseal system inverted flat roof waterproofing method offers a simple build up waterproofing that features a protected waterproofing membrane and loose laying insulation boards.
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.
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.
