Gable meets wall

[leucothea]

I have water leaking through the spot where a roof replacement abuts an old wall. I have my theories about how the water is getting in, but what I’d like is some advice on the detailing where the ridge tiles meet the wall. Is this how it should be done?

Thanks in advance!

 

[Kearn]

What’s the gable wall construction?

There seems to be a small lead flashing on the tiles, but stops before the ridge. Is this just butted up with some lime?

I would want a larger flashing, across all tiles and capped over the ridge tile.

How it’s cut into the wall though is a question depending on what is behind…

 

[leucothea]

Thanks. I found a few other pictures that show the wall—a real mess. We were only able to remove cement from one part and filled in a lot of the holes. I guess water is finding its way down some channel in the stone work. Perhaps the render could be capped at the top with lead?

 

[stuart45]

The lead work isn't right for slates. You should have lead soakers under each slate and a lead cover flashing over the top. The ridge needs a lead saddle under it at the abutment.

 

[Cubist]

Given the state of the render above the problem area and below the masonry of the chimney it may be wise to consider a lead new section of lead flashing let into the masonry and over the top edge of the render - I suspect that rainwater may also be penetrating there to work its way down behind the render.

 

[Stevers]

The lead work isn't right for slates.

I assumed that the first photo showed the saddle under the ridge tile and the first soaker grinning through between the slates.

 

[stuart45]

It might have soakers under the slates, but there doesn't look like there was room to get the minimum 3 inch upstand along the wall. They set the bellcast too close to the slates. The cover flashing shouldn't be dressed over the slates as well. Generally to me it looks like a bit of a bodge, which is probably why it's leaking.