There are two basic categories of roof design.
Thickness of flat roof insulation.
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.
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.
See the department of energy s doe ranges for recommended levels of insulation below.
Flat roof insulation thickness.
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.
Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and.
A cold roof has the insulation placed below the structural deck which thus remains cold.
There are many different types and installation methods out there along with a lot misinformation about which products offer the greatest energy savings.
With a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same.
Roofing insulation is one of the most important and misunderstood building components.
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.
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.
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.
Rockwool products are available with a bitumen or mineral coated fiberglass face to be used in a number of roofing solutions.
The waterproof layer is above the insulation and a vapour control layer is placed below the insulation.
The typical u value of an existing uninsulated flat roof is 1 5w m2k.
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.
It should be of the maximum available thickness.
