Warm Roof Vs Inverted Roof

Warm roofs a warm roof includes insulation above the structural deck.

Warm roof vs inverted roof.

The waterproof covering is placed above the insulation and a vapour control layer is placed below the insulation. 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. The thermal efficiency isn t as good as with warm roof. It is a warm roof but with the insulation above the waterproof membrane and structural deck.

A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface. This is also known as an upside down or protected membrane roof. 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 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.

When we talk about a warm roof vs a cold roof what we re really talking about is the insulation of the flat roof. The breakdown warm roof vs cold roof. What is a warm roof or a cold roof. There are three recognised designs of flat roof construction.

Warm cold and inverted. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. Inverted roof designing buildings wiki share your construction industry knowledge. 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.

Benefits of inverted roofs. Namely the insulation layers. 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. Installing a warm roof can be extremely straight forward and simple to do.

An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation. Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof. It does not require a vapour retarder.