Inverted Roof Vs Warm Roof

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Inverted roof vs warm roof.

Warm roofs a warm roof includes insulation above the structural deck. So what kind of difference does this make. It does not require a vapour retarder. Basically there are two options to choose from when insulating a flat 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. In a warm roof construction the principal thermal insulation layer is located above the structural decking resulting in the structural deck and support structure being at a temperature close to that of the interior of the building. You create a warm roof or a cold roof simply by applying the layers of the roof in a different order. 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.

It is a warm roof but with the insulation above the waterproof membrane and structural deck. Namely the insulation layers. This is also known as an upside down or protected membrane roof. An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation.

A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. Benefits of inverted roofs. 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.

The thermal efficiency isn t as good as with warm roof. When we talk about a warm roof vs a cold roof what we re really talking about is the insulation of the flat roof. Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof. Warm cold and inverted.

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. Simply defined as a type of roof construction where the waterproofing layer lies beneath the insulation instead of above it as in other forms of roofing inverted roofs ensure that the complete roof construction including roof covering is kept at warm temperatures during winter months and at moderate temperates during the summer months. The waterproof covering is placed above the insulation and a vapour control layer is placed below the insulation.