Warm Deck Roof Insulation Thickness

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.

Warm deck roof insulation thickness.

They lose loads of heat and are prone to leaking causing the materials to deteriorate. Warm flat roofs do not need to be ventilated as the insulation is. Saint gobain insulation uk manufacture and supply glass mineral wool slabs and rolls along with rigid polyisocyanurate pir boards that can be considered suitable for a wide range of applications across flat roofs whether you re looking to insulate at joist level or above the roof deck in your flat roof construction. Warm deck flat roof insulation is now the standard way to insulate a flat roof click to enlarge flat roofs for example on extensions bathrooms and dormer windows are not the best of ideas.

No ventilation is required for these types of roofs. A flat roof where the insulation sits below the waterproof membrane and above the structural deck is a warm roof deck. Cold deck this is where the insulation is placed between the joists rafters or in between the ceiling joists in the case of a pitch roof. Cold deck roof a cold deck roof is where the insulation is placed between the joists rafters or in.

Warm deck insulation 1. A warm roof has the insulation above the structural deck which is thus kept warm. Warm deck roof a warm deck roof is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation. The waterproof layer is above the insulation and a vapour control layer is placed below the insulation.

Ventilation is required for these roofs. The insulation is immediately below the waterproofing layer. Min 125 thickness of insulation board then finish on top. The vapour control layer is above the decking but below the insulation.

How to install insulation in a flat roof with timber deck insulated above the joists. 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. There are two basic categories of roof design. Add to this the firring pieces for slope say 75 max.

18 thickness of deck. The insulation can be adhered mechanically fixed or loose laid.