Hi,
I'm looking for some advice on the cause of a potential problem.
I recently had my extension smooth rendered and there is a small area where it is not drying out. This also showed up on the scratch coat beforehand. It's about 5ft from the floor. Please see pic attached
There are no leaks from above and the wall is in the sun most days with no rain fall for a while.
The wall is block cavity with kingspan.
There's no sign of damp inside but there are kitchen cabinets in the way so can't be totally sure.
The plasterer rendered 2 coats with no rendagrip or such.
The only thing I can think is that due to material shortages during lockdown my builders yard delivered the smooth 100mm blocks rather than the rough ones. Almost like a smooth cement block similar to commons. My builder did say the mortar isn't bonding to them as well as normal blocks.
Any advice would be greatly appreciated as I didn't want to start painting with sandtex until I'm sure what it was.
Regards
Jack
I'm looking for some advice on the cause of a potential problem.
I recently had my extension smooth rendered and there is a small area where it is not drying out. This also showed up on the scratch coat beforehand. It's about 5ft from the floor. Please see pic attached
There are no leaks from above and the wall is in the sun most days with no rain fall for a while.
The wall is block cavity with kingspan.
There's no sign of damp inside but there are kitchen cabinets in the way so can't be totally sure.
The plasterer rendered 2 coats with no rendagrip or such.
The only thing I can think is that due to material shortages during lockdown my builders yard delivered the smooth 100mm blocks rather than the rough ones. Almost like a smooth cement block similar to commons. My builder did say the mortar isn't bonding to them as well as normal blocks.
Any advice would be greatly appreciated as I didn't want to start painting with sandtex until I'm sure what it was.
Regards
Jack