Warm Flat Roof Thickness

The vapour control layer is above the decking but below the insulation.

Warm flat roof thickness.

These are can be supplied with rebated edges which interlock reducing the risk of uplift. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. Insulation in a warm roof. Min 125 thickness of insulation board then finish on top.

18 thickness of deck. There are two types of flat roof. 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. As opposed to old built up felt roofing with joins new single ply waterproof membranes are now most commonly used.

The insulation for a warm roof will usually be boards of extruded polystyrene or rigid compressed boards of glass fibre or rock fibre. It must provide adequate protection against the elements keeping the buildings structure and interior dry. Flat roof u value 0 18 w m2k 2 warm deck flat roof the type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturer s specifications. A flat roof must be strong durable and stable throughout its lifetime.

Cold roofs and warm roofs. The insulation material for a warm flat roof should. The joist size depends on your span but assuming you are going out say 3m or so your joists would be about 150 deep. Add to this the firring pieces for slope say 75 max.

Flat roof types.