I have recently had new windows fitted to a 1930's house. The wall is cement rendered.
The installation company claims they knew how to render. They had two initial attempts where within days the render cracked and fell off. By this time the width of render needing to be replaced had grown to about 150 mm around each window.
Third time they sent in their specialist - the specialist said the profile around the window was round and they could not render to it directly and would have to fit 25* 25 mm wooden strips to wall around the windows. The wood was screwed to the wall to form a complete frame around each window.
They then fixed galvanized plaster board corner strips on top of the wooden strips.
They then rendered over the front face only - one coat and stuck plastic strip to the side over the unprotected galvanized strips. There are gaps about 5 mm between the plastic and galvanized strip.
The problem I have now is that there are vertical and horizonal cracks appearing.
Is is this a normal way to render or install new windows.
The company has refused to come back and is FENCA registered. FENCA do not want to know?
Any advice is welcome?
The installation company claims they knew how to render. They had two initial attempts where within days the render cracked and fell off. By this time the width of render needing to be replaced had grown to about 150 mm around each window.
Third time they sent in their specialist - the specialist said the profile around the window was round and they could not render to it directly and would have to fit 25* 25 mm wooden strips to wall around the windows. The wood was screwed to the wall to form a complete frame around each window.
They then fixed galvanized plaster board corner strips on top of the wooden strips.
They then rendered over the front face only - one coat and stuck plastic strip to the side over the unprotected galvanized strips. There are gaps about 5 mm between the plastic and galvanized strip.
The problem I have now is that there are vertical and horizonal cracks appearing.
Is is this a normal way to render or install new windows.
The company has refused to come back and is FENCA registered. FENCA do not want to know?
Any advice is welcome?