Inverted Flat Roof Insulation

It is worth considering that standard xps and eps inverted roof insulation is not as thermally efficient as pir insulation when used as part of a standard warm roof design.

Inverted flat roof insulation. An inverted roof also referred to as a protected membrane or upside down roof is form of flat roof in which the waterproofing layer is beneath the thermal insulation rather than above it. Inverted roofs are a type of warm flat roof where the insulation is above the waterproofing layer. Foamglas inverted roof systems inverted roof with non combustible insulation on a continuous support foamglas invatherm loose laid double layer system 2 4 system 4 8 3 7 8 schematic drawing 9 5 solutions for technical details and specification clauses can be provided on request. A the permanent protection of the waterproofing membrane of the overlying layers from factors such as solar radiation extreme temperature variations mechanical stresses etc.

Insulation can either be put below the weather proof membrane which is called a warm roof deck construction or above the waterproof membrane which is called an inverted warm deck. The great benefit of inverted roofs is that the insulation protects the membrane from extremes of weather such as frost uv exposure and the expansion and contraction that comes about from summer winter temperature cycles which can be as much as 80 c on some roofs. Ravatherm xps x has been created specifically for inverted roofs a form of flat roof where the thermal insulation is placed above the waterproof membrane. Benefits of inverted roofs.

This makes it the only material suitable and approved for inverted roof applications. However there are other products on the market such as enertherm xps plus which outperform traditional xps boards. The added benefit of this type of roofing is that the membrane is also protected from expansion and contraction caused by changes in the weather and temperature. Project specific proposals or solutions are.

The standard design consideration is that the rain falling on the roof filters through the ballast and between the insulation boards until it reaches the membrane and then drains away through rainwater outlets. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. The inverted roof insulation protects the membrane from extremes of weather such as frost uv exposure and the expansion and contraction that comes about from summer winter temperature cycles. The main advantages of the inverted roof insulation with ballast are.