Rendered garden wall problem

Question

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?

Anthony · Accepted 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

Emil · Answer

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.

Simon · Answer

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.

Ryan · Answer

This could be due to insufficient drainage behind wall

Sam · Answer

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.

Rendered garden wall problem

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