Wet marks on wall where UPVC windows join

I'm guessing these damp patches are on the inside of the house? Any chance of photos?

 

Hi Claire,
having damp spots like that is not right, can you take any pics of the outside and in particular the top of the window frames which might help identify the problems.

 

Hopefully some experts can help you here. There is clearly something amiss, but I have no idea what.

I'm not even sure if windows rely on this sealant bead to prevent water getting through to the inside skin - surely there should be a cavity gap to prevent that even without sealant?

What type of windows did you have previously? And there was no water ingress whatsoever?

For the fitters to claim it ain't a bug problem and it is fairly common is nuts, and that's my main worry - they ain't taking it seriously.

Is that a cavity wall? I wonder if something is bridging it that shouldn't be?

Personally, I think I'd be worried if they managed to make it stop just by adding more sealant. I think I'd like the real cause found and sorted.

But I'm not knowledgeable on window installs.

 

Seems it may be coming in at or near the top, and tracking across running down the inside of the trim.

Mr. HandyAndy - Really

 

First of all is it a cavity wall or a solid wall secondly i couldnt see any sort of sealant along the top of the window externally just looked like a gap

 

How old is the property?



Anyways, regardless of that, the window shouldn't be letting water by.

Of course, it's chust about possible that the water is coming in somewhere else, and only finding its way to the inside along the window join. But not so likely.

Anyways, what type of windows did you have previously? And was there any water ingress whatsoever with these?

 

HiClaire
This must be a sealant problem, and as said above it is possible that the gaps you have identified at the top are allowing the water to enter externally onto the top rail and and run along and down the sides. The other option is that the sealant on the sides has some gaps but unless they are at the top it is unlikely to have made the upper part of the window reveal damp as I think you show, which therefore points to the top being the problem.

Regarding the Thompsons, this appears to me to be the fitters passing the problem off as porous brickwork, which is difficult to accept if it was not a problem before.
if it was me I would be going back to the company and asking one of the managers/surveyors to come out and see the damp and the poor beading. Perhaps the window needs to come out and be refitted.

 

Keep us posted as to how they respond.

Good luck.

 

You didn't have damp patches before they fitted the windows and now you do, damp patches aren't normal or common so they have to sort it out.

 

Yes, and taking that piece of trim off(allowing the fitters to do this) may reveal more about the problem.

Mr. HandyAndy - Really

 

You only need a tiny gap for water to get in and it can easily track as Handy has said. Double check to make sure silicone is properly applied. Also check that you haven't got a gap around that tv ariel cable!