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PostPosted: Sun Feb 03, 2008 2:11 pm 
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Hi,

I'm renovating a 1900 house with stone walls. There was a problem with penetrating damp and on the affected walls I stripped away most of the old render and plaster, except in a couple of places at the bottom where the render was very hard s&c which stopped the damp.

I have had a plasterer in to render the walls, and I was expecting him to put a think render of waterproof sand and cement, but instead he has used PVA and Hardwall plaster (not particularly thick) and is suggesting the dot and dab plasterboard on to make up the thinkness, before skimming.

My question is, will this Hardwall be a good enough barrier? I'm not sure if he has mixed any waterproofer in with it, and I'm not at all confident that the PVA he put on the stone beforehand will create any kind of barrier given the quality of the mortar etc between the stone.

Any advice would be much appreciated.

Cheers,

Robin


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PostPosted: Sun Feb 03, 2008 10:48 pm 
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I have done damproofing in a couple of houses and always used a backing coat of render mixed with integral waterproofer, then plastered ontop of that afterwards.

To be honest I am not at all familiar with hardwall :scratch:

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PostPosted: Sun Feb 03, 2008 11:02 pm 
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if theres a damp issue hardwall should not be used, waterproofer or not.

ive just finished a job and that had stone walls. Scratched it 5-1 with a plasticiser/waterproofer (dubbed it out 1st) then 6-1 top coat.

Ive also done another one with a damp problem and i used a SBR slurry on it 1st then floated it with s&c.

You should of had a few quotes cos the spreads would have told you they would do it with s&c not hardwall


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PostPosted: Mon Feb 04, 2008 9:31 pm 
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:wtf: he sounds like a cowboy :la:


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PostPosted: Mon Feb 11, 2008 9:41 pm 
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yes deinetly a cowboy yeehaaaaa


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