Hardwall or render?

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Spreadley

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I'm re-floating and setting a master bedroom in a Victorian terris solid 9" walls. Can I float the walls with hardball instead of sand cement render? I have heard backing plasters have a tendency to draw moisture??

I would prefer to use backing plaster as it is quicker cheaper and less messy, my clients are a young couple and I do not want to rinse them but at the same time I don't want to cut corners.
 
Hardwall and bonding draws moisture as does dabbing on bear brickwork on the inside of external wall ls if there's no cavity OR on downstairs walls.

Depending on the wall location in the room and what reason it came off you could use.a lightweight plaster (hardwall, drycoat etc) but sometimes it will suck moisture from something.

What was the reason for it coming off? Damp or blown?

What came off? Black morter?


I always use waterproof sand cement no matter what for patching in, rendering etc. But I do damproofing so its all I've ever really known.
 
It was lime render, as far as I'm aware this type of render always starts to loose bond after 100 years, there wasn't any damp issues.

i can't use insulated board as I have governing points windows that I can't come out past.

Only one wall is an exernal wall.

will probably use sand and cement to be sure
 
@gps I've had this argument before ,I've rang BG and they have told me it was made for precisely this scenario, architects recommend this for external walls we'll the ones I've worked anyway ,I've never had any issues before,
 
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i wouldnt Use it on external walls myself ,have heard Ss argument before but I'm not convinced, I wouldn't use it after injection ,renovating was good but hardwall is not a replacement in my mind, sorry sS,
 
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johniosaif said:
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i wouldnt Use it on external walls myself ,have heard Ss argument before but I'm not convinced, I wouldn't use it after injection ,renovating was good but hardwall is not a replacement in my mind, sorry sS,
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i think that says it all really , it's hard being this good:RpS_biggrin:
 
Judgeing by what he said there is no damp issues, the old plaster blown after many years.....


Although the wall isn't damp bonding or hardwall will probably cause damp issues as its a external solid wall
 
I always put a scratch-coat of sand and cement on exterior walls, before applying any hardwall, or dry-lining. Salt inhibitors optional but worthwhile :RpS_thumbup:
 
Don't know y u bother,hardwall has got all those additives added.
i floated a little toilet wall with hardwall ,I left it 4days before I set it ,I gave it a quick splash with my water brush and it never pulled in at all when I set it,so what does that tell you what bg add to it ,you couldn't do that with bonding
 
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Put 2 and 2 together mate.

I said were its patched with bonding or hardwall on the external wall it will probably get damp.


I never said anything about patching anywere else.
 
roryston said:
Put 2 and 2 together mate.

I said were its patched with bonding or hardwall on the external wall it will probably get damp.


I never said anything about patching anywere else.
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I've done it for years and years ,I haven't had a come back yet,ring bg technical 0844 800 1991
 
superspread said:
Don't know y u bother,hardwall has got all those additives added.
i floated a little toilet wall with hardwall ,I left it 4days before I set it ,I gave it a quick splash with my water brush and it never pulled in at all when I set it,so what does that tell you what bg add to it ,you couldn't do that with bonding
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Yeah I know you can do that if necessary. D'ya reckon it's got cement in it then? I know it's got salt inhibitors in, but not confident enough in it to bang it straight onto an exterior wall, it's just re-branded renovating plaster and I know of plenty jobs where it [rp]was used and it became damp. From penetration in my opinion :RpS_thumbup:
 
@superspread

Well agree to disagree, you might of been fine but I don't use it anywhere near any areas that are prone to moisture.

noticed my original response got posted as well even though it said It didn't, dont think I was trying to overload you with replys mate.
 
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