The problem with this kind of flat roof.
Inverted roof vs warm roof.
Installing a warm roof can be extremely straight forward and simple to do.
A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface.
There are three recognised designs of flat roof construction.
You create a warm roof or a cold roof simply by applying the layers of the roof in a different order.
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.
Basically there are two options to choose from when insulating a flat roof.
Benefits of inverted 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.
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 breakdown warm roof vs cold roof.
Warm roofs a warm roof includes insulation above the structural 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.
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.
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.
Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof.
What is a warm roof or a cold roof.
Namely the insulation layers.
An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation.
There is normally some ballast to hold the insulation down.
Inverted roof designing buildings wiki share your construction industry knowledge.
While traditional roofs place the insulation under the protective membrane inverted roofs are designed with the waterproofing layer usually a liquid applied membrane beneath the insulation.
The thermal efficiency isn t as good as with warm roof.
