Cavity wall wet inside

[Nige F]

Had another ...Make a small pitched/ tiled roof behind parapet....then you "only" have 2 small valleys -where you could use tiles or soakers...and an abutment to behind the parapet where you have 2 flashings cut into the render over soakers...and it all sheds water. Sometimes it`s done on old/large chimneys so there is not a long back gutter behind.

 

[Amy501]

Thanks for your but there's already a pitched/tiled roof behind the parapet. There are more photos on here (somewhere) where you can see that.

Hoping to get up and have a look this weekend - weather permitting of course.

 

[Alastairreid]

here ya go.
View media item 18986 View media item 18987

 

[noseall]

here ya go.
View media item 18986 View media item 18987

Now that has just bowled me over!

There is an elegant little gable finishing off the bay window nicely and it appears to have grown a wart!

Those side windows are all but useless now. Somebody had a sense of humour me thinks.

 

[Amy501]

Finally got a chance to get a ladder out this weekend and take a look on the roof. Was only a brief look as it was very cold (fingers started to freeze within minutes) and the gutters were full of snowy stuff.

Anyway, on brief inspection couldn't see anything obvious. No cracked tiles, lead flashing looked OK, ridge tiles OK - wish I had seen something because then at least I would have something that I could put right. Now have to wait until the weather improves (again) so that I can get back out and take a closer look.

Meanwhile, I have discovered that the inside of the cavity wall is wetter the colder it is. Assume this is condensation? (There has been water ingress above at some point but think this is a different issue).

We have been having most windows and internal doors open at night and this has resulted in windows which are free from condensation in the mornings (which is brilliant). We don't have trickle vents on the windows so opening them is our only option. We can't, however, seem to stop condensation forming on the inside of the cavity wall.

I have read about DRILL VENTS and wondering if this would help, improve the air flow etc.? Have also read that gable ends can cause problems with condensation because there is no opening at the top of the cavity. Is there anything we can do to rectify this?

This is starting to drive me nuts because I'm at a loss as to know what to do. The leak at the top I can find and cure, but I don't know what to do about the condensation. If anyone has had a similar problem and can help that would be absolutely fantastic