hi
i'm not a plasterer but having a go at a job for my mum as she hasn't got a lot of money so needs must so any advice appreciated. she's got two attic bedrooms with damp from the chimney breasts in each rooms, i've done everything possible to rectifty potential causes but walls still damp and plaster shot in places. its an old house and i've hacked of the old plaster back to brick where needed and the plan was to use salt neautraliser, tanking slurry and then prime with sbr and plaster with renovating plaster (which i've managed to get a few bags from someone who had some left over). does that sound about right?
there's a section in the wall in both rooms where the chimey flue rises that has a void with just some wooden laths covering it. will renovating plaster be ok on that or is there anything special i need to do to the wood or should I replace it with eml or something?
my other question is - and this may be a bit of a dumb question to you lot - where i want the new plaster to meet up with the old, does the renovating plaster shrink back enough while drying to drop back enough for the skim coat? so that when i'm putting on the undercoat plaster i can put it on wet, flush with the old plaster? as this would be easier to judge for me or does the undercoat need to be applied 2-3mm below the old existing plaster?
thanks in advance
i'm not a plasterer but having a go at a job for my mum as she hasn't got a lot of money so needs must so any advice appreciated. she's got two attic bedrooms with damp from the chimney breasts in each rooms, i've done everything possible to rectifty potential causes but walls still damp and plaster shot in places. its an old house and i've hacked of the old plaster back to brick where needed and the plan was to use salt neautraliser, tanking slurry and then prime with sbr and plaster with renovating plaster (which i've managed to get a few bags from someone who had some left over). does that sound about right?
there's a section in the wall in both rooms where the chimey flue rises that has a void with just some wooden laths covering it. will renovating plaster be ok on that or is there anything special i need to do to the wood or should I replace it with eml or something?
my other question is - and this may be a bit of a dumb question to you lot - where i want the new plaster to meet up with the old, does the renovating plaster shrink back enough while drying to drop back enough for the skim coat? so that when i'm putting on the undercoat plaster i can put it on wet, flush with the old plaster? as this would be easier to judge for me or does the undercoat need to be applied 2-3mm below the old existing plaster?
thanks in advance