Float over vandex

[Cornelius]

I've got some floating to do over vandex, I've had a look on the vandex website about how long I should be leaving vandex before plastering over? Normally I find vandex sweats and gets loads of condensation on it whilst drying, however the vandex was applied yesterday and is drying out nicely turning a pale grey and hardly any moisture coming off it. How long would you leave it before getting on it?

 

[zolco]

I skimmed it next day

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[Dropsalot]

I've done it next day, no troubles. Spec called for 2 coats vandex slurry, s&c scratch and topcoat plus skim. Did it all on consecutive days, topcoat s&c hung about a bit, skim went like a train.

 

[Badgerrrrrrr]

I skimmed it next day

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Is that possible to skim directly onto the vandex Zolco !. Saw it done a few years back , but never saw the finished job !.

 

[zolco]

Is that possible to skim directly onto the vandex Zolco !. Saw it done a few years back , but never saw the finished job !.

I just skimmed over this, their technical guy said you can top it with any skim they not fussed about it. Done this about 3 years ago still solid but had some hairline cracks appear after a year or so, just put some easyfill over it and redecorated.

this is how it looked like after skim and paint

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[Badgerrrrrrr]

@zolco , looks like you've rendered then skimmed. The way you said you just skim the next day, was as if you skimmed directly onto the vandex !, I did see it about 10 years ago where he s&c first,then vandex, then skim directly on to the vandex ! Thought it was abit strange back then, was wondering wether it could be done that way!

 

[zolco]

@zolco , looks like you've rendered then skimmed. The way you said you just skim the next day, was as if you skimmed directly onto the vandex !, I did see it about 10 years ago where he s&c first,then vandex, then skim directly on to the vandex ! Thought it was abit strange back then, was wondering wether it could be done that way!

Yes it's just floated out in vandex, was equivalent to thistle dri-coat and then just skimmed it. It wasn't tanked or slurry coated or anything, the wall got chopped back, injected, floated then skimmed.

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[Badgerrrrrrr]

Yes it's just floated out in vandex, was equivalent to thistle dri-coat and then just skimmed it. It wasn't tanked or slurry coated or anything, the wall got chopped back, injected, floated then skimmed.

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Ok with you now, no this guy actually skimmed over the vandex slurry. Strange one I no.

 

[adapt]

Ideally you need to get on to tanking the next day, its all to do with the curing process. I read somewhere if you leave it to dry out then start to go over it then there is a chance the coats won't stick to each other and it will go boxy ?

I always get on it next day, yeah it does condensate a lot tanking. I tend to use renderlite or insulated boards these days. A lot faster that S&C and a S&C scratch slides like hell on tanking.

 

[zombie]

More to point what the fooook is the crazy scratch pattern all about?

Nice consistent wave with a proper scarifier for me far better key for skim