Hi,
We put a waterproof membrane 1.2m up a damp wall, however the damp is creeping above this, I suspect coming through the plasterboard through the dot and dab mix, which seems to attract water. In an attempt to solve this as easily and permanently as possible, I was thinking of using an insulated tile backer board from CTD, stuck to the existing (slightly damp in spots) wall with Intumescent acrylic sealant from Everbuild, then using a sealing strip like you'd use in a wet room, to totally waterproof the wall. I was then thinking of skimming directly onto this surface.
Do we reckon this might work OK? Slightly expensive as I need 5 tilebacker boards at 12+vat each, plus a couple of tubes of sealant, and then the waterproofing tape, which I have already. Any downsides to this anyone can think of? Will the plaster take to the boards, so long as I prime it, PVA or Acryllic primer?
Sean.
We put a waterproof membrane 1.2m up a damp wall, however the damp is creeping above this, I suspect coming through the plasterboard through the dot and dab mix, which seems to attract water. In an attempt to solve this as easily and permanently as possible, I was thinking of using an insulated tile backer board from CTD, stuck to the existing (slightly damp in spots) wall with Intumescent acrylic sealant from Everbuild, then using a sealing strip like you'd use in a wet room, to totally waterproof the wall. I was then thinking of skimming directly onto this surface.
Do we reckon this might work OK? Slightly expensive as I need 5 tilebacker boards at 12+vat each, plus a couple of tubes of sealant, and then the waterproofing tape, which I have already. Any downsides to this anyone can think of? Will the plaster take to the boards, so long as I prime it, PVA or Acryllic primer?
Sean.