In each 16 wide channel there is a pitiful layer of r13 fiberglass batt attached to vapor barrier paper laid against the ceiling.
Pearl deck flat roof insulation.
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.
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.
Up to 25 of a buildings heat loss is through the roof.
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.
Ideal for both new build and existing roofs replacing or refurb.
Air impermeable insulation spray polyurethane foam is air impermeable.
The low density stuff works in the.
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.
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.
So why would you ever construct a deck this way.
Insulating a timber deck flat roof can be done using warm deck construction method or cold roof construction method.
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.
126mm celotex td4000 pir flat roof insulation board with plywood.
I have a very sligthly sloped flat roof deck held up by 2x8 s to which the ceiling for the upstairs room is attached.
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.
You would never construct an unvented roof this way.
Warm roof or warm deck construction positions the insulation boards above the timber rafters directly below the roof s weatherproof membrane.
It also provides better thermal performance and makes it easier to eliminate thermal bridging.
Condensation and decay are bad air permeable insulation under deck can lead to condensation and decay.
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.
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.
