Warm Roof Insulation Thickness

It should be of the maximum available thickness.

Warm roof insulation thickness.

The thickness of insulation required will vary depending on the material you decide to use and the manufacturer s specification. The vapour control layer is above the decking but below the insulation. Although i m sure this can differ considerably depending on insulation etc can anyone tell me what the approximate thickness of a warm deck flat roof will be including joists. The insulation is immediately below the waterproofing layer.

These are can be supplied with rebated edges which interlock reducing the risk of uplift. Kingspan and recticel are the two of the most well known flat roof insulation brands and they re firm favourites of insulation superstore customers. Thickness varies according to the manufacturer s specifications. Flat roof insulation thickness.

The insulation material for a warm flat roof should. The waterproof layer is above the insulation and a vapour control layer is placed below the insulation. Hitting amazing levels of 0 13w m will need 300mm of mineral wool or 180mm of rigid foam. There are two basic categories of roof design.

Reason i ask is because i m trying to work out whether my upstairs toilet waste pipe will be high enough to divert on top of the flat roof to the side of the house. A warm roof has the insulation above the structural deck which is thus kept warm. A warm flat roof or a built up roof bur is one where all the insulation is above the joists deck making them part of the warm fabric of the building. Achieving a u value of 0 20w m meaning your roof will be better insulated than your walls will need 120mm thickness of rigid foam or 200mm of mineral wool or natural insulation.

The insulation for a warm roof will usually be boards of extruded polystyrene or rigid compressed boards of glass fibre or rock fibre. The typical u value of an existing uninsulated flat roof is 1 5w m2k. A ventilation gap usually 50mm should be provided between the top. Insulation in a warm roof.

Insulating a pitched roof above the rafters is the common method chosen for new builds and re roofing existing detached buildings as it provides superior thermal performance for the building. Warm deck the type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturer s specifications. Insulating a flat roof with recticel powerdeck u recticel s powerdeck u offers 0 024 u value for thicknesses 120mm or more so it s a great thermal insulator as well as a strong and stable board for structural integrity.