DIY Doctor

Main navigation

Can I use "dot and dab" method with plasterboard that has metallised polyester foil backing

Postby Radge70 » Thu Dec 10, 2020 8:45 pm

I am doing a fist time "do it yourself" damp roofing job and am very inexperienced!
I have purchased some Knauf Vapour Panel Square Edge plasterboard from Wickes.
The description of the product is "Vapourshield is laminated with a metallised polyester foil to create an effective vapour barrier."
I plan to "dot and dab" the Knauf Vapour Panel to a damp proof membrane.
I just wanted to check that the dot and dab method will work since this plasterboard is a bit more specialised than the normal stuff. e.g. can you still dot and dab to the metallised polyester foil backing?
Rank: Apprentice
Progress to next rank:
Posts: 6
Joined: Fri Nov 02, 2018 3:44 pm


Simply Build It

Postby stoneyboy » Fri Dec 11, 2020 10:30 pm

Hi radge70
Short answer to your question - NO.
Regards S
Rank: Project Manager
Posts: 4752
Joined: Wed Dec 10, 2008 6:44 pm

Postby Carl.Lewis » Sun Dec 13, 2020 12:01 am

You will have two problems when trying to dot and dab foil backed boards:

1. the vapour barrier wont allow any suction so the adhesive wont grab hold and the board will pop off.

2. Even if it did hold, the foil on these boards peels off very easily.

You will be better fixing battens to the wall and fixing the boards to them.
Rank: Labourer
Progress to next rank:
Posts: 2
Joined: Sat Dec 12, 2020 11:54 pm

Postby Radge70 » Sun Dec 13, 2020 9:13 pm

Thanks for the replies. Batons aren't an option because the depths I am working with but I've come to the conclusion that the silver backed plasterboard isn't really neccissary anyway. Unfortunately it's been bought and delivered though so would it be viable just to rip out the foil in the places where the adhesive is gong to go and stick it on that way? This will save me a lot of hassle in terms of disposing of the boards I've bought and getting new ones up to my top floor flat!
Rank: Apprentice
Progress to next rank:
Posts: 6
Joined: Fri Nov 02, 2018 3:44 pm

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics