Celotex td4000 flat roof plywood bonded boards celotex have replaced this range.
Flat roof insulation boards with ply.
Please consider celotex crown fix.
Celotex td4000 is purpose designed for use in light traffic flat roof applications.
The most efficient and best insulation used is rigid foam polyiso.
Also consider using alternative rigid pir boards with external quality plywood boards added separately.
Iso is available in a range of thicknesses that come in increments of 1 inch.
Is a three in one product to provide deck vapour.
Celotex td4000 pir insulation for light traffic flat roof applications.
Cost of rigid foam board insulation.
Run vertical 2 3 boards battens over roof sheething 16 o c.
This will create ventilation and separation between attic roof substate and the roof itself.
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.
And then install 1 2 minimum recommended is 5 8 or thicker plywood on top of battens.
It accounts for over 60 of all installs.
A flat roof should always allow for water channelling and drainage to prevent issues such as ponding.