Dab Not Sticking To Thermal Plasterboard

Dab Not Sticking To Thermal Plasterboard

Author
Discussion

Renovation

Original Poster:

1,763 posts

120 months

Monday 27th April 2015
quotequote all
My plasterer has dabbed some Gtec XPS boards and whilst the dab has stuck to the wall the boards can be pulled off cleanly.

My supplier said the dab ought to be spread over the whole board as well as the wall being dabbed - plasterer says he's never had a problem.

The celotex boards come with a paper backing - which have stuck but these Gtec boards have a polystyrene back - the only reason I bought them is they are available locally whilst the celotex ones had to be ordered in and I didn't have time to wait.


james7

594 posts

254 months

Monday 27th April 2015
quotequote all
I have seen this used a lot recently with very good results. Dries quickly and does stick well. It will take up gaps in voids a bit as well so the wall behind does not have to be perfect.

http://www.selcobw.com/bond-it-polyurethane-constr...

Rosscow

8,723 posts

162 months

Monday 27th April 2015
quotequote all
I'm not a big dot and dab fan - batten the wall and screw it on smile

Renovation

Original Poster:

1,763 posts

120 months

Monday 27th April 2015
quotequote all
i've just called Siniat Tech Line - they say thermal boards only need more dab than std boards.

But as my reveals were around 50% covered and they still haven't stuck that's no help.

banghead


roofer

5,136 posts

210 months

Monday 27th April 2015
quotequote all
Crazy foam, mist the wall and board first, sticks like st to a blanket.

Neil - YVM

1,310 posts

198 months

Monday 27th April 2015
quotequote all
roofer said:
Crazy foam, mist the wall and board first, sticks like st to a blanket.
this ^

http://www.screwfix.com/p/soudal-expanding-sticky-...

Simpo Two

85,150 posts

264 months

Monday 27th April 2015
quotequote all
Renovation said:
My supplier said the dab ought to be spread over the whole board as well as the wall being dabbed
Which is then not a dab!

Mr GrimNasty

8,172 posts

169 months

Monday 27th April 2015
quotequote all
You should have some mechanical fixings regardless. You could probably remedy the problem by using a semi-foaming pu glue on top of the dabs, sets very quickly and it won't expand and push every thing out of line like foam. e.g. http://www.screwfix.com/p/evo-stik-polyurethane-wo...