Inverted Roof Vs Warm Roof

A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface.

Inverted roof vs warm roof.

Benefits of inverted roofs. The breakdown warm roof vs cold roof. 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. On pitched roofs the definition of warm or cold can relate to the entire space below the pitch of the roof but above the ceiling.

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. Protected membrane roof pmr in a protected membrane roof also known as an inverted roof membrane assembly irma the insulation is installed on top of the membrane. Extruded polystyrene xps is the most suitable type. Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof.

As we ve seen though hybrid roofs are as likely if not more likely to occur because of on site issues without the input of designers. Inverted roof designing buildings wiki share your construction industry knowledge. Cold roof warm roof inverted roof. You create a warm roof or a cold roof simply by applying the layers of the roof in a different order.

The thermal efficiency isn t as good as with warm roof. If work has progressed too far there is likely to be a greater willingness. Inverted roofs because of the need for ballast paving or vegetation inverted roofs typically weigh about 90kg m2 which means the structural load is the. Nowhere does it support the design and construction of hybrid roofs.

So what kind of difference does this make. Warm roofs a warm roof includes insulation above the structural deck. Basically there are two options to choose from when insulating a flat roof. Namely the insulation layers.

When we talk about a warm roof vs a cold roof what we re really talking about is the insulation of the flat roof. In a cold roof the insulation is applied between the rafters but in a warm roof the insulation is applied on top of the existing roof surface. The waterproof covering is placed above the insulation and a vapour control layer is placed below the insulation. The insulation may be exposed to water so it should have minimal water absorption characteristics.