Damp above formerly external doorways after extension

david555_2

Thanks Stuart, that makes sense. I'll ask and see if they were installed below the windows/above the flashing. Can they be retrofitted without too much hassle?

stuart45

They can be retro fitted by removing some brickwork, if this is the cause of the problem.
It's not below the windows, but the exposed brickwork.

david555_2

stuart45 wrote: »

They can be retro fitted by removing some brickwork, if this is the cause of the problem.
It's not below the windows, but the exposed brickwork.

OK you mean the brickwork either side of the windows for the cavity tray points?

I suppose the hard part is tracking down the source of the problem. How would you even start such a task other than wait for marks on the wall to fully form and assume they give some direction? Something I can't really do what with the move in two weeks.

stuart45

It's not always easy to know where the damp comes from, but if it's coming after heavy driving rain, there's a fair chance it's coming inside the cavity if the flashing is put into the joints correctly.
You can also try a water test with a hose pipe against the brickwork.

david555_2

Thanks Stuart, all good things to check. Builder has reassured me that it'll be fixed regardless.

Doozergirl

It looks like the downpipe from the main roof is spilling solely onto the flashing. Better to extend the bend so it flows down over the tiles and not where it appears to have to travel uphill a bit.

david555_2

Doozergirl wrote: »

It looks like the downpipe from the main roof is spilling solely onto the flashing. Better to extend the bend so it flows down over the tiles and not where it appears to have to travel uphill a bit.

Yes you’re right. That’s one for the snag list this week. The plan is to extend it down to the lower guttering on the extension so it’s a bit neater.

jk0

david555 wrote: »

Yes you’re right. That’s one for the snag list this week. The plan is to extend it down to the lower guttering on the extension so it’s a bit neater.

Actually I think it's better on the tiles. This will tend to spread out the stream in heavy rainfall, so that bottom gutter is not overwhelmed.

Doozergirl

jk0 wrote: »

Actually I think it's better on the tiles. This will tend to spread out the stream in heavy rainfall, so that bottom gutter is not overwhelmed.

Ditto. Only needs slightly extending.

stuart45

jk0 wrote: »

Actually I think it's better on the tiles. This will tend to spread out the stream in heavy rainfall, so that bottom gutter is not overwhelmed.

https://www.diynot.com/diy/media/dsc00017.103099/
Got this problem on a job I'm doing at the moment. Gutter can't cope with taking half of the main house.