Re-skim question

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RMK

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Patched a solid lime plastered external wall last week with limelite base coat and left 2mm and a mech key with the idea to finish in high impact lime plaster this week.
decorator has stripped the wall paper off and (kindly) persuaded the owners to re-skim the entire wall through.
tarmac say you can't re-skim with limelite high impact finish plaster, so i'm wondering... do i...

a) build out the patch and any areas that need it to square the wall up with limelite base coat, allow to dry and then re-skim the lot with multi

b) build out the patch with 2 mm of bonding, and re-skim the lot with multi

answers on a post card. ;D

thanks
 
limelite will react with gypsum-you can overskim the lot with high impact but you need a coat of sbr first-thats what tarmacs technical dept told me and i didnt have any probs on a similar sort of job-but then you could probably do it in reverse-sbr and then skim with multi-the sbr acts as a barrier between coats-does this make any sense?
 
what is this high impact finish, as iv been told i should use it on re skims on lime work? not multi?
 
According to Tarmac limelite finish can be used for reskims over lime but must be mixed with sbr at a rAtio of 2.5L to a bag, then topped up with water to desired consistency.
They didn't say owt about multi mate. Ring bg
 
I used to work for a firm who coud never make there mind up between limelite and dri coat for damp work, and we never used the high impact finish and never had a problem.
 
I was talking to a damp proof guy at the merchants a while ago and they use multi over limelite too. Not saying it's right but hey they're the pros!
 
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