DirtyLocal
Member
- Messages
- 1
- Location
- West Yorkshire
Hi Forum,
I've searched old posts, and I don't think anyone has asked exactly this question.
We have a late c18th/early c19th stone barn long ago converted and had unpleasant things done to it, including bitumen laid over beautiful stone flags.
I've used an SDS drill to remove several tonnes of gypsum plaster from about 100m2 of wall. Some of which was 10-12cm thick. It's left a lot of residual bits of plaster on the stones - some in lumps that come off with a chisel (although often not cleanly), but some is in thin layers, streaks or in nooks & crannies that doesn't come off so easily.
The sand blaster has advised making the walls as clean as possible to get an consistent finish when they're blasted.
Does anyone have any advice? Is it just a case of a stiff nylon brush and repeated passes of scrubbing and blowing/vacuuming, or is it worth, say, spraying with water and letting it dry first - or is there something more radical. I'm not keen on using needles, the stone is a a very soft gritstone (I think), though more like sandstone in texture, and I think needles will visibly change the texture (although I'm not 100% sure about that).
Many thanks!
I've searched old posts, and I don't think anyone has asked exactly this question.
We have a late c18th/early c19th stone barn long ago converted and had unpleasant things done to it, including bitumen laid over beautiful stone flags.
I've used an SDS drill to remove several tonnes of gypsum plaster from about 100m2 of wall. Some of which was 10-12cm thick. It's left a lot of residual bits of plaster on the stones - some in lumps that come off with a chisel (although often not cleanly), but some is in thin layers, streaks or in nooks & crannies that doesn't come off so easily.
The sand blaster has advised making the walls as clean as possible to get an consistent finish when they're blasted.
Does anyone have any advice? Is it just a case of a stiff nylon brush and repeated passes of scrubbing and blowing/vacuuming, or is it worth, say, spraying with water and letting it dry first - or is there something more radical. I'm not keen on using needles, the stone is a a very soft gritstone (I think), though more like sandstone in texture, and I think needles will visibly change the texture (although I'm not 100% sure about that).
Many thanks!