Render Repair - Removing Expansion Joint and Repairing Render


Postby greyfergie » Thu May 29, 2014 4:25 pm

My house is one of a self build from the Potton, Caxton Range.
The render is based on stainless twill-lathe and on build was dressed with a Sandtex High Build and then rippled.
At the time of render an expansion joint was inserted on the gable end wall above a 8 ft wide window. Over the past w4 yrs, the high build has flaked exposing an unsightly crack showing a line across the gable end.
I am seeking advise as to removing the expansion joint, repairing the render and then making good the exsisting High Build.
Any information would be gratefully appreciated?
Greyfergie ,located in SW
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Postby thedoctor » Fri Jul 25, 2014 12:06 pm

Dont come across too many expansion joints in render.Chopping out the render is not a difficult job and patching it up again is just a question of getting as much render into the fissure as possible then scraping it level using a straight edge either side of the hole or crack. If you want to know about the mix you should use we have a table of mortar mixes on this page and the attached image shows how to get your render level with the surface either side of it. I hope this all helps,please do let us know how you get on.

http://www.diydoctor.org.uk/projects/mortarmixes.htm
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