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Ask your QuestionMy garden wall can't seem to hold paint and bits of render keep cracking and falling off. I assume it's a damp issue. Is there anything i can do?
Asked by Gillian on 31st Mar 2021Best Answer
"Probably has not had a stabilizer b4 paint or painted direct on to damp render
Answer = take off loose bits / wire brush / scapper apply an s.b.r sealer when dry
Repaint 2/3 coats of Masonary"
"Hi, Gillian, I can't advise you very much I need to see it to understand. Could be many reasons why the rendering is coming of and the painting."
Answered on 6th Apr 2021 - Member since Dec 2016 - report"Is it a retaining wall? These have problems with the constant slow release of water vapour pushing from behind the render., the freeze/ thawing cycle will make this delaminate.
If the external rendering was carried out in cold temperatures being exposed to frost this will effect the integrity of the strength of finished render.
Is there coping stones on top? Without a minimum 25mm over hang and a drip cut formed this will have effects. Poor pointing between the stones will not help.
Could be to much waterproofing agents in the mix trapping moisture faster than it can release!
Although people or tradesman think "it's only a garden wall", these can be the trickiest jobs to get done right."
"Strip the render and try to discover the damp issue. Once discovered eliminate the damp and the render the wall and paint again and jobs a good one."
Answered on 28th Oct 2021 - Member since Oct 2021 - report