Decided to start plastering our home (70's cavity wall brick/block bungalow) in the worst room and I am totally stumped on how to deal with the exterior wall. It has a lot of issues so easiest if I list them:
1. Saturated cavity insulation (which I've removed by taking away the window sills and sucking out with an industrial vac. Now the cavity is pretty much clear and any remaining rubble is below the original DPC level.
2. Previous owners have done a few hack jobs at the plaster and damp proofing which means they have covered the walls with cladding to hide the issue. The cladding is now gone, but the walls are covered in 2-3mm deep stripes of pinkgrip glue and the wall itself has been covered in different damp proof or vinyl paints over the ages.
3. I'm still getting a could of damp spike areas mostly below the skirting. Everything else is 15% or lower
4. There is a lot of cracking and crumbling in some spots. However, the original render is neigh on impossible to remove even with an SDS drill. I've tried and have only succeeded where the render is on brick and not block. So now it looks very patchy.
I was planning on using the dryzone system to fix the wall, but wasn't going to plasterboard since I can't remove the render. I was going to add new render on the areas where it is missing, then plaster. I was thinking I'd still use the crème dpc injected into the walls, but since I can't remove the render, I can't add the liquid DPC below the new DPC level of the injected crème.
Do you think it would be smarter to just do the DPC injections, patch up the render and then plaster board? Worried that if I plasterboard, it will cause issues around the window as they are no perfectly fitted and the wall level protruding further might be an issue. Or, should I just do the liquid DPC, fix the render, then blue grit the whole wall and just start skimming? Maybe I can use the dryzone DPC paint onto of the old plaster?
Sorry this is so wordy, but I'd really appreciate any suggestions. Have added a few pics for reference. The top of the wall is pretty much ok with the exception of the glossy vinyl paint around the window.
1. Saturated cavity insulation (which I've removed by taking away the window sills and sucking out with an industrial vac. Now the cavity is pretty much clear and any remaining rubble is below the original DPC level.
2. Previous owners have done a few hack jobs at the plaster and damp proofing which means they have covered the walls with cladding to hide the issue. The cladding is now gone, but the walls are covered in 2-3mm deep stripes of pinkgrip glue and the wall itself has been covered in different damp proof or vinyl paints over the ages.
3. I'm still getting a could of damp spike areas mostly below the skirting. Everything else is 15% or lower
4. There is a lot of cracking and crumbling in some spots. However, the original render is neigh on impossible to remove even with an SDS drill. I've tried and have only succeeded where the render is on brick and not block. So now it looks very patchy.
I was planning on using the dryzone system to fix the wall, but wasn't going to plasterboard since I can't remove the render. I was going to add new render on the areas where it is missing, then plaster. I was thinking I'd still use the crème dpc injected into the walls, but since I can't remove the render, I can't add the liquid DPC below the new DPC level of the injected crème.
Do you think it would be smarter to just do the DPC injections, patch up the render and then plaster board? Worried that if I plasterboard, it will cause issues around the window as they are no perfectly fitted and the wall level protruding further might be an issue. Or, should I just do the liquid DPC, fix the render, then blue grit the whole wall and just start skimming? Maybe I can use the dryzone DPC paint onto of the old plaster?
Sorry this is so wordy, but I'd really appreciate any suggestions. Have added a few pics for reference. The top of the wall is pretty much ok with the exception of the glossy vinyl paint around the window.
