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Hi All

Looking for some advice. We had a single story extension designed and built 8 years ago.

Since it’s construction we have had issues with water running off the parapet walls down the face of the wall. This happens on both sides.

The initial builder did some remedy work initially but it’s still happening - we don’t have any leaks into the property but i’m concerned with the saturation over time.

The architect, so i have learned massively over complicated the roof design when actually he could have simply run the roof edge to edge in a traditional way. Not much i can do now.

I’ve checked a few things, drip edges seem to be working, mortar joints seem in good condition, over hang at the front is about 30mm.

Is this a coping stone issue (roof design aside) and is there any remedy to this without cutting down the parapets and having the roof redone?

Any advice would be much appreciated for when i speak to some roofers.

Many thanks
Steve
 

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Hi All

Looking for some advice. We had a single story extension designed and built 8 years ago.

Since it’s construction we have had issues with water running off the parapet walls down the face of the wall. This happens on both sides.

The initial builder did some remedy work initially but it’s still happening - we don’t have any leaks into the property but i’m concerned with the saturation over time.

The architect, so i have learned massively over complicated the roof design when actually he could have simply run the roof edge to edge in a traditional way. Not much i can do now.

I’ve checked a few things, drip edges seem to be working, mortar joints seem in good condition, over hang at the front is about 30mm.

Is this a coping stone issue (roof design aside) and is there any remedy to this without cutting down the parapets and having the roof redone?

Any advice would be much appreciated for when i speak to some roofers.

Many thanks
Steve
Fix a batten to the wall at the same height as your eaves tiles and protruding the same. Fix lead from the underside of the coping down onto the batten and slightly beyond, to form a drip. Extend the gutter to the end of the wall.

Refine the above as you wish, i.e. extending the fascia, slight slope on the batten, tucking the lead behind the step flashing etc, but the principle applies.
 
The once weather copings are barely wide enough , open mortar joins can be seen, nothing securing the copings .
Guttering needs sorting
Incorrect tiles for roof pitch .
You could try what has been suggested, but there are other issues
 
Looks like the corner of those tiles are tilted outward rather than inward which will help pitch the water over the guttering which looks like it should be extended.
 
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I’ve done some testing with a hose and the drip edges are working, however I think the front edge over hang is too shallow hence why it’s dripping on the wall. To confirm this i’ve bonded a L shaped strip to the leading edge of the copeing to divert the run off away.

I think as others have suggested, I think running the soffit and gutters right to the edge and continuing a couple of tiles across and then running a lead flashing from under the coping will sort it out. I’m annoyed that the architect designed the roof with a parapet for asthetics rather than function - but not much I can do about it now.
 

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