So why would you ever construct a deck this way.
Pearl deck flat roof insulation.
Insulated decking for flat roofs comprising a fibre free polyisocyanurate pir insulation core faced with tough exterior grade plywood used as pre insulated foil backed thermal insulating decking for flat roofs.
It is recommended where possible to use the warm deck method of insulation where the principal layer of roof insulation is positioned above the structural deck.
Ecotherm in flat roofs.
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.
In each 16 wide channel there is a pitiful layer of r13 fiberglass batt attached to vapor barrier paper laid against the ceiling.
This warm deck construction method is generally accepted as the best method of insulating this type of flat roof and is the standard method of installing roof insulation in most new builds.
I have a very sligthly sloped flat roof deck held up by 2x8 s to which the ceiling for the upstairs room is attached.
Celotex crown bond is a high performance flat roofing insulation board featuring innovative composite facers on both sides a low lambda value of 0 022 w mk and a compressive strength of up to 150 kpa providing increased dimensional stability and added robustness.
Insulating a timber deck flat roof can be done using warm deck construction method or cold roof construction method.
You would never construct an unvented roof this way.
The main advantage of a warm deck construction versus a cold deck construction is that there is no need to include a ventilated cavity in the warm deck construction.
Therefore the space between the ceiling and the roof deck is about 7 inches much like a cathedral ceiling except that it s basically flat.
Air impermeable insulation spray polyurethane foam is air impermeable.
By using insulation with excellent thermal performance this will greatly improve the energy efficiency of the building and in turn make meeting building regulations standards easy.
The low density stuff works in the.
It is ready to fix and finish using basic tools and traditional roofing techniques.
Warm roof or warm deck construction positions the insulation boards above the timber rafters directly below the roof s weatherproof membrane.
126mm celotex td4000 pir flat roof insulation board with plywood.
Exceptional dimensional stability and rated for extreme hail rockwool stone wool insulation roof boards have meet both the fm severe hail and the ul 2218a standard for impact resistance.
Condensation and decay are bad air permeable insulation under deck can lead to condensation and decay.
Enjoy interior design freedom with above deck roof assemblies that allow for open interior ceilings and spaces.
Ideal for both new build and existing roofs replacing or refurb.
