So I thought this would be a relatively straightforward job. It would appear not...
A vertical crack has developed on the face of the house from the windows sill on the first floor down to the porch. It is mirrored on the internal wall in the bedroom. I am pretty positive it is caused by moisture penetration as there is mould on the inside wall and some of the surrounding plaster is blown.
So to fix it I chiseled out the cracked render and mortar. I filled the crack with external sealant left it to dry for approx 15hrs. Then I applied a mix of 4:1 concrete and sand with added water proofer. By the following morning I now have a hairline crack running through the concrete following the same general route as the original crack (which was more than hairline). This has happened twice so clear ly I am doing something is wrong. Is it my mix,or my method or should I just paint over the hairline crack?
Any suggestions or help would be much appreciated!
N.
A vertical crack has developed on the face of the house from the windows sill on the first floor down to the porch. It is mirrored on the internal wall in the bedroom. I am pretty positive it is caused by moisture penetration as there is mould on the inside wall and some of the surrounding plaster is blown.
So to fix it I chiseled out the cracked render and mortar. I filled the crack with external sealant left it to dry for approx 15hrs. Then I applied a mix of 4:1 concrete and sand with added water proofer. By the following morning I now have a hairline crack running through the concrete following the same general route as the original crack (which was more than hairline). This has happened twice so clear ly I am doing something is wrong. Is it my mix,or my method or should I just paint over the hairline crack?
Any suggestions or help would be much appreciated!
N.