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Damp Proofing
Cellar conversion: how to fix plasterboard to tanked wall?
I'm converting my cellar. The front bay wall had a bit of damp so I've tanked it in KA tanking slurry. The plan is to have a radiator in the middle of the bay.
My question is how should I fix plasterboard to this wall?
Some say I should avoid battening the walls as it would require drilling through my new tanking. Some people say I should drill it anyway and plug the hole with silicon. Some have suggested thermal plasterboard and dot and dab it.
The newly tanked wall is covered in KA Slurry and bitumen vinyl is over the top of that on the bottom 3 feet of wall. The floor is a concrete slab which was poured into a plastic VCL however the membrane ends at the wall/floor joint. There is no VCL on the walls.
If you need any further info, just shout.
Thanks very much in advance, this has been a real head-scratcher for me!
5 Answers from MyBuilder Damp Proofing Specialists
Best Answer
Personally would of used a tanking membrane instead of the slurry or even both. I personally recommend a metal frame stud wall in basements. If you’re going to use battens staple a plastic DPC to the back of the battens. This way the wood is never touching your masonry
Answered 11th Aug 2020
Hi, I would avoid drilling and battens, as there is no going back if that creates further issues, I would dot and dab, if that does not work at least you're not starting from scratch !
Answered 14th Jul 2020
the way i fix plasterboard to a tanked cellar would be with foam its doesnt go far but your safe as you cannot pierce the tanking all builders yard and screwfix sell them it does exband so just wedge a batton agains it hope this helps
Answered 14th Jul 2020
Hi
If the walls tanked
And you don’t want waterproof render and gypsum plaster
You have a few ways to do it !
You can attach a mesh membrane plastic hammer in plugs then dot and dab , would avoid dot and dab straight on tanking as if there is moisture it usually travels through the dabs
So that’s why I would put a membrane there!
You can build a floating timberStud frame and use thermal vapour boards you don’t have to drill the wall if you can fix floor to ceiling
Answered 17th Jul 2020
首先我个人不推荐卡。使用体育rmagard or K11 slurry. Application is best over 3 coats to include floor, fillet and walls.
Secondly, have you considered rendering on a permaseal (or similar) membrane system? This can also be ''dot and dab'ed'' onto. (But do not dot and dab onto anything else, it draws moisture out of the substrate)
Do you have space to build a stud wall Infront of the external substrate? A tanked basement with a stud fame is by far the most successful way of converting a basement as nothing is attached to the external substrates.
You should also consider ventilation. If it's not correctly ventilated mould will quickly appear
Good luck. Call a professional to do it for you
Answered 2nd Sep 2020
