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