The most efficient way to cut Celotex is with a hand saw. Not only does this support minimal dust creation, but in many cases, you can use off-cuts to fill any gaps that may still be there during installation. Product certificates are issued based on test results, calculations and other specific verification

Not all vapor barriers are created equal – different materials make sense in different situations and for different projects. When it comes to vapor bond tape, there’s a few things to pay attention to make sure that it delivers on what you need for the best protection possible. Install vapor barriers on the side of the wall that experiences the hotter temperature and wetter conditions. Avoid installing them on both sides of a structure; spaces should have the ability to dry out in one direction when the other side is built to prevent moisture penetration. This is why it is not advised to put a vapour barrier on two sides of the cavity or installation. Different terms used for a vapour barrierIn an ideal scenario, the VCL would be placed to the top side of the joists before boards are laid. The insulation would be below this, meaning that the VCL is on the warm side of the insulation. This would then stop warm, moist air from entering the structural elements. Step two: Cut the 1200mm x 24000 PL4000 board to fit the board floor-to-ceiling height of the room. When using softwood timber battens, make sure they are treated prior to installation. Any joints will need to be sealed with Single Sided Foil Tape. Remember, it is very important to seal everything and not just sections of VCL membrane. These include the ceiling joint, floor joint and any vertical joints where the VCL meets adjoining walls. As well as foil tape, expanding foam is another possible option for this. Masonry/wood primers combined with tape is another option. It simply requires you to peel it off and adjust it according to your installation needs, ensuring a cleaner application. Step two: Where required, cut the assigned 1200mm x 2400mm board (Celotex PL4000 or Celotex GA4000) to ensure they fit floor-to-ceiling room height.

The very best thing to do is call the manufacturer tech line for the wood/laminate or other covering and MAKE SURE you are talking to a tech guy and NOT a rep/sales rep. Ask for the nerdy guy, he has all the legitimate answers. Tip: For high thermal performance, place the unprinted foil face surface towards the air cavity. What you need:

Single-Sided VCL Tape     

Reduce heat loss and boost energy efficiency by installing vapour control layers in your home. Perfect for installation in roofs, ceilings and walls, they’re airtight and provide effective condensation control for all building types. It is however a good idea to consult your local building code as if installed on the wrong side in a certain climates a vapour barrier could end up trapping moisture leading to damp and rot within the walls and roofing. The air will contain too much vapour when the temperature drops, which is emitted in the shape of water. This is what we call condensation. Cool surfaces like cold walls, the roof, windows, doors and domes will cool down fastest. Step seven: Use an angle fillet at the frame and an angle bead or scrim tape at the external corners to finish.