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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Removing a permacoat type coating from exterior stone walls
Our has has previous had one of those spray on semi-permanent coatings
applied. I think they are advertised to last 25 years and save you the trouble of painting etc etc Ours is not quite so successful and is trapping water between it and the stone walls. I've started to remove these sections by hand (well, with a scraper and hammer) but where there is brick the coating is stuck on hard. I don't want to damage the surface of the bricks, so was thinking of using a paint stripper instead. I've had someone suggest HomeStrip. Is that something that anyone here has tried - or do you have any other suggestions? regards Simon |
#2
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Removing a permacoat type coating from exterior stone walls
Bitstreams wrote:
Our has has previous had one of those spray on semi-permanent coatings applied. I think they are advertised to last 25 years and save you the trouble of painting etc etc Ours is not quite so successful and is trapping water between it and the stone walls. I've started to remove these sections by hand (well, with a scraper and hammer) but where there is brick the coating is stuck on hard. I don't want to damage the surface of the bricks, so was thinking of using a paint stripper instead. Easy enough on render, but a real pig on brickwork because the surface isn't level. |
#3
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Removing a permacoat type coating from exterior stone walls
In message , stuart noble
writes Bitstreams wrote: Our has has previous had one of those spray on semi-permanent coatings applied. I think they are advertised to last 25 years and save you the trouble of painting etc etc Ours is not quite so successful and is trapping water between it and the stone walls. I've started to remove these sections by hand (well, with a scraper and hammer) but where there is brick the coating is stuck on hard. I don't want to damage the surface of the bricks, so was thinking of using a paint stripper instead. Easy enough on render, but a real pig on brickwork because the surface isn't level. Hmm.... We put external insulation over cement pargetting and the architects insisted on having all the weathercoat removed first. The builders got in a local *grit blaster* who blew it off with a mix of water, sand and air. regards -- Tim Lamb |
#4
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Removing a permacoat type coating from exterior stone walls
On 19 Aug, 21:59, Tim Lamb wrote:
In message , stuart noble writes Bitstreams wrote: Our has has previous had one of those spray on semi-permanent coatings applied. I think they are advertised to last 25 years and save you the trouble of painting etc etc *Ours is not quite so successful and is trapping water between it and the stone walls. I've started to remove these sections by hand (well, with a scraper and hammer) but where there is brick the coating is stuck on hard. I don't want to damage the surface of the bricks, so was thinking of using a paint stripper instead. Easy enough on render, but a real pig on brickwork because the surface isn't level. Hmm.... We put external insulation over cement pargetting and the architects insisted on having all the weathercoat removed first. The builders got in a local *grit blaster* who blew it off with a mix of water, sand and air. regards -- Tim Lamb I hadn't thought of grit blasting - is this a job to do myself? I had a look at the local hire shops and they seem to charge around £100 for a days hire of a grit-blaster. Looking on ebay it seems that I could buy a unit for less than that and just hire a compressor. I do have the whole house to do.. anyone used one of these things from a hire shop? Simon |
#5
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Removing a permacoat type coating from exterior stone walls
In message
, Bitstreams writes . Hmm.... We put external insulation over cement pargetting and the architects insisted on having all the weathercoat removed first. The builders got in a local *grit blaster* who blew it off with a mix of water, sand and air. regards -- Tim Lamb I hadn't thought of grit blasting - is this a job to do myself? I had a look at the local hire shops and they seem to charge around £100 for a days hire of a grit-blaster. Looking on ebay it seems that I could buy a unit for less than that and just hire a compressor. I do have the whole house to do.. anyone used one of these things from a hire shop? I would strongly recommend using a professional. The compressor needed is like a young bus! Protective gear is essential. Get some prices locally it may not be inordinate. Good bloke at Flamstead in Herts:-) regards -- Tim Lamb |
#6
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Removing a permacoat type coating from exterior stone walls
On 20 Aug, 08:23, Bitstreams wrote:
On 19 Aug, 21:59, Tim Lamb wrote: In message , stuart noble writes Bitstreams wrote: Our has has previous had one of those spray on semi-permanent coatings applied. I think they are advertised to last 25 years and save you the trouble of painting etc etc *Ours is not quite so successful and is trapping water between it and the stone walls. I've started to remove these sections by hand (well, with a scraper and hammer) but where there is brick the coating is stuck on hard. I don't want to damage the surface of the bricks, so was thinking of using a paint stripper instead. Easy enough on render, but a real pig on brickwork because the surface isn't level. Hmm.... We put external insulation over cement pargetting and the architects insisted on having all the weathercoat removed first. The builders got in a local *grit blaster* who blew it off with a mix of water, sand and air. regards -- Tim Lamb I hadn't thought of grit blasting - is this a job to do myself? I had a look at the local hire shops and they seem to charge around £100 for a days hire of a grit-blaster. Looking on ebay it seems that I could buy a unit for less than that and just hire a compressor. I do have the whole house to do.. anyone used one of these things from a hire shop? Simon- Hide quoted text - - Show quoted text - Grit blasters will damage the bricks I would go to the manufacturer and ask if there is any solvent for the set product That is if they are still in business Those coatings are an unmitigated disaster and most unsympathetic My guess is that if you can get the bulk of it off with a reciprocating cutter such as Fein multimaster - type machine (obviously a mulitmaster is too small for the job but you may be able to make a reciprocting cutter that does a similar job say from a cut saw or the like) and get the bulk of it off and then see what gets rid of it I used a large angle grinder with masonry disc and the cover taken off and took of the first mm or so of brick It took three days to do a well windowed front elevation 7m wide and 10 m high and I came out of it looking like a red Indian (they were soft red rubbers) and my next-door neighbours were none too pleased with the dust on the cars! Chris G |
#7
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Removing a permacoat type coating from exterior stone walls
On Aug 20, 1:03*pm, wrote:
On 20 Aug, 08:23, Bitstreams wrote: On 19 Aug, 21:59, Tim Lamb wrote: In message , stuart noble writes Bitstreams wrote: Our has has previous had one of those spray on semi-permanent coatings applied. I think they are advertised to last 25 years and save you the trouble of painting etc etc *Ours is not quite so successful and is trapping water between it and the stone walls. I've started to remove these sections by hand (well, with a scraper and hammer) but where there is brick the coating is stuck on hard. I don't want to damage the surface of the bricks, so was thinking of using a paint stripper instead. Easy enough on render, but a real pig on brickwork because the surface isn't level. Hmm.... We put external insulation over cement pargetting and the architects insisted on having all the weathercoat removed first. The builders got in a local *grit blaster* who blew it off with a mix of water, sand and air. regards -- Tim Lamb I hadn't thought of grit blasting - is this a job to do myself? I had a look at the local hire shops and they seem to charge around £100 for a days hire of a grit-blaster. Looking on ebay it seems that I could buy a unit for less than that and just hire a compressor. I do have the whole house to do.. anyone used one of these things from a hire shop? Simon- Hide quoted text - - Show quoted text - Grit blasters will damage the bricks I would go to the manufacturer and ask if there is any solvent for the set product That is if they are still in business Those coatings are an unmitigated disaster and most unsympathetic My guess is that if you can get the bulk of it off with a reciprocating cutter such as Fein multimaster - type machine (obviously a mulitmaster is too small for the job but you may be able to make a reciprocting cutter that does a similar job say from a cut saw or the like) and get the bulk of it off and then see what gets rid of it I used a large angle grinder with masonry disc and the cover taken off and took of the first mm or so of brick It took three days to do a well windowed front elevation 7m wide and 10 m high and I came out of it looking like a red Indian (they were soft red rubbers) and my next-door neighbours were none too pleased with the dust on the cars! Chris G I'd avoid any of the options mentioned so far, you dont want to trash the front of the stone. Re stripping chemicals, the one cheap enough for large area use is sodium hydroxide. Although it destroys wallpaper paste, if made up mild enough the 2 can be mixed and used - if its effective on your coating. Failing that there's a water vortex device used to do these jobs, but I cant remember the name of it. Best ask on the periodpropertyuk forum. This is one of those jobs where I really wouldnt act on the advice here until you've checked it out with people with more knowledge on this. This is not a PP expert forum. NT |
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