There are four suppliers that I know off that will supply this self-adhesive best vapour barrier for flat roofs.
Only one of them will supply by the meter, and that is:
If you use our promo code LFR2013, you will get our discount (if the promo code is not working phone and mention this site and get the new one)
Why is it the best vapour barrier for flat roof?
- Vapour resistance of 2000 MNs/g
- Self-healing if punctured by fixings
- Temporarily waterproofs the roof ( can stay uncovered for up to 3 months)
- Easy to install
Its not cheap, purchasing it by the role and by the pallet load is cheaper but is a considerable layout.
This video shows me testing the vapour barrier when we did a job late last year. A primer for the vapour barrier is recommended if you are going to glue down over the top of a surface that not sound and should also be used if its cold. It sticks very well sometimes too well if you let it touch itself you have to throw it away as you just won’t get it apart.
If you are going to order this for a flat roof and your roof is say 20m² make sure you order closer to 28m² because of overlapping joints, you don’t wont to run out.
Another good thing about this vapour barrier is that it bridges small gaps, it’s designed to bridge over the corrugations on metal roofing sheets and not to break even if you step on it. The corrugations can be as wide as 150mm in some cases.