Rendered garden wall problem

My 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 6th Apr 2021
Expert Trade Answers
"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"
Answered on 1st May 2021 - Member since May 2021 - report
"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."
Answered on 3rd May 2021 - Member since Feb 2021 - report
"This could be due to insufficient drainage behind wall"
Answered on 10th Mar 2023 - Member since Feb 2023 - report
"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
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