I would really appreciate some advice on this. In August 2016 we had a loft conversation done and the dormers were rendered white to match the house. It was a very hot week. When I painted the dormer a week or so later there were already hairline crack on both ormers which the builder filled and said it would be fine. I had my reservations, however after a long build we just wanted the job finished. He promised to rectify any future issues.
The construction method was:_
Timber joists, boarded, waterproof breathable membrane, expanded metal, scratch coat and top coat. Sandtex on top to finish.
The render is now cracking on both sides and the rear.
It would seem the whole lot needs to be taken off and redone at a significant cost. My question is should we go again with sand and cement based render or should we use one of the acrylic renders like K Rend. The obvious issue is ongoing maintenance as it requires scaffolding to gain access for any future repairs.
Can upload pictues if that would help.
The construction method was:_
Timber joists, boarded, waterproof breathable membrane, expanded metal, scratch coat and top coat. Sandtex on top to finish.
The render is now cracking on both sides and the rear.
It would seem the whole lot needs to be taken off and redone at a significant cost. My question is should we go again with sand and cement based render or should we use one of the acrylic renders like K Rend. The obvious issue is ongoing maintenance as it requires scaffolding to gain access for any future repairs.
Can upload pictues if that would help.