Is this a good detail for a boundary wall gutter?

To cut a long story short, we have brickwork and roof timbers done on an extension we're having built which runs right along the boundary, but I didn't think about gutter overhang onto the neighbours property.

Having spoke to them they dont't want any gutter overhanging, so now we need to do something about the guttering.

I'm thinking of asking the roofer to do something like in the attached photo, but I'm just wondering if anyone has any advice on it.

He mentioned possibly doing a parapet/box gutter like in the second photo.

Any thoughts?

 

Thermal bridge.

Flat surface to hold water (under gutter)

Condensation under lead

Lead in 1.5m sections, how is it to be jointed when its flat?

 

Box gutter, but not lead use ubiflex it comes in 6 or 12m lengths

 

Where are you going to drain it to? make sure that you drain the gutters into your property.

 

You could do something like this, at the time I was doing some drawing/detailing for a firm and (against my advice) they designed (and got approval for) an extension that allowed for no overhang on the boundary, fast forward six months or so and the neighbours didn't want an overhang, funnily enough! So little choice but to build something like this. Christ knows how it turned out, I daresay an ugly lead flashing of some sort to get it to drain into the downpipes which were at each end helpfully, reducing the falls.

 

The first Drawing can work.
We have done similar with a bespoke aluminium box gutter with an outlet built in at one end.
It sits on outside skin we used wakaflex under and up what would be a fascia not over the inside skin .
It was low to the ground. Lead would have been stolen.
Insulated with pir. Underlay support trays used with ofv .
Over all length was 6.4.

 

That's a good way to end up with a leak.....

 

None yet in the 10 years I’ve been using it, maybe it’s your technique.....

 

I prefer to do it properly with lead. Not with a product that is not made or guaranteed for flat areas.

 

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