Traditionally flat roof constructions fall in to two camps.
Celotex cold deck flat roof insulation.
Is a three in one product to provide deck vapour.
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.
For all updates and celotex announcements since june 2017 please see the links below.
As for insulating below the joists an insulating laminate insulation bonded to plasterboard such as celotex pl4000 or a separate rigid pir insulation board finished with a separate sheet of plasterboard can be securely fixed to the joists to provide an internal finish to the roof.
Warm deck sandwich or cold deck.
Warm flat roofs and cold flat roofs.
There should be no insulation below the deck and no ventilation is required.
A warm flat roof is defined by insulation being installed on top of the roof deck.
In each case the name refers to the position of the insulation in relation to the roof deck.
Flat roofs there are two common forms of construction for flat roofs.
Here the roof deck is maintained at the same temperature as the internal.
Celotex offer pir thermal insulation boards in various thicknesses for new build and refurbishment applications for both the commercial and domestic sectors.
01473 820850 celotex co uk flat roof insulating deck applications flat roof insulation falls the structure should be designed so that the finished roof has a continuous smooth and even slope towards the rainwater outlet or gutter.
Celotex td4000 is purpose designed for use in light traffic flat roof applications.
We know insulation inside and out.
This wool is packed into the joists and rafters a clear gap of 5cm is left between the insulation and the timber board to allow condensation to escape this is to prevent the condensation making contact with the boarding.
Celotex td4000 comprises a polyisocyanurate rigid foam insulation core with a thermal conductivity of 0 022 w mk and low emissivity aluminium foil facings on both sides bonded to a layer of 5 5mm wbp exterior grade plywood.
Warm deck roof with this type of roof the insulation is placed above the roof deck but below the weatherproofing.
A cold flat roof does include insulation typically by way of kingspan or celotex insulation material inserted between joists.
Usecelotex td4000 to combine high performance thermal insulation with 5 5mm wbp ply for use in flat roof deck applications to minimise insulation thickness and give the following benefits.
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