No, the wall seemed fine. We're wondering if it could be just be condebsation. That wall is east facing and the other external wall is north facing.The wall paper that was on the wall before, was it bubbling/falling off/peeling before you stripped it and was there anything unusual that you noticed at that section prior to plastering?
Did you notice anything at all?
Thank you, this is really really useful.All good advice but difficult to give advice. The best person to ask would be a local builder familiar with your particular housing stock. Perhaps the cavity is full of debris perhaps that portion of the wall is a cold spot for condensation perhaps the window wasn't fitted correctly ... It could be lots of things hope you get it sorted
Thank you. Yes, we think the window might have been added there at some point in the last 15 years. Would you suggest sealing this with outdoor sealant or cement? The window sill hasn't been painted in years, and the paint is cracked, so I also need to scrape this and repaint which might help too.I don't like the look of where the bricks finish in relation to the window sill?
What's stopping any moisture going down at the point where bricks meet (or rather don't) the sill on the reveal?
If he's skimmed it after an hour you can bet he's used bonding or similar.
Take it off and get it re plastered using the additive 'triple strength medusa' in a sand & cement mix. Then skimmed.
You could put a hose on the back of the wall with that gear in it, your wall won't be damp [emoji3]
There is a radiator on the wall that has the condensation problem. Makes no difference whether the radiator is on or not to the problem. It's an uninsulated external north east facing wall on part of the property which doesn't receive much sunlight, meaning the wall is very cold. Agree proper ventilation is required but won't help with problem of cold wall.Mechanical ventilation is essential at any condensation point, is there a rad in bathroom? Any reason so cold other than damp.
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