Thickness Of Flat Roof Insulation

A cold roof has the insulation placed below the structural deck which thus remains cold.

Thickness of flat roof insulation.

Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Foamular xps roof insulation for commercial buildings page 5 foamular xps roof insulation for commercial buildings foamular xps insulation is a rigid foam insulation which meets the needs of today s design professionals for a truly sustainable insulation product. Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and. Roofing insulation is one of the most important and misunderstood building components.

The chosen insulation laid on top of this should be able to take the weight of anything put above it on the roof without compression or protected from compression by further sheeting. Flat roof insulation thickness. Rockwool stone wool roof insulation combines the thermal performance dimensional stability impact resistance and acoustic control required to increase the performance of many flat roof assemblies. 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.

When installing a flat roof it is important to ensure you have suitable flat roof insulation to minimise any heat loss and improve noise insulation and is an essential part of the roof structure without appropriate flat roof insulation the extension or building will not pass building regulations. The waterproof layer is above the insulation and a vapour control layer is placed below the insulation. Our range of high and optimum performance flat roof insulation products are suitable for use in a range of flat roofs. See the department of energy s doe ranges for recommended levels of insulation below.

Rockwool products are available with a bitumen or mineral coated fiberglass face to be used in a number of roofing solutions. It should be of the maximum available thickness. A warm roof has the insulation above the structural deck which is thus kept warm. With solutions ranging from our optim r vacuum insulation panels to our therma range of pir insulation we can provide the best solution for flat roof insulation for roofs with mechanically fixed bonded or torch applied waterproofing systems.

The typical u value of an existing uninsulated flat roof is 1 5w m2k. With a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same. There are two basic categories of roof design.