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Posted: Tue Jun 10, 2008 10:39 am
by mand4
I had a single storey extension built 4 years ago. The old drain pipe serving the rain water from my house and next door's roof, used to drain into my kitchen sink drain, but after the extension was built, the drain pipe was cut above the extension roof and the water now drains onto the roof and into the extension guttering. (hope this is clear) Not been a problem, but neighbour is saying that the rainwater is flowing over the side of my roof and flooding his garden. I have checked for any blockages, but the gutterings clear. He wants to add an extra length of pipe to take the water directly into guttering, but I have concerns about it, as I think it would cause gutter to overflow, as water would be directed into one spot. There is an alternative solution, that being to replace old pipe with 4 metre one and run it into neighbours sink gulley, but he doesn't want that. Don't know what to do, really would appreciate any advice.
Posted: Wed Jun 11, 2008 4:18 am
by lutonlagerlout
is it a flat or pitched roof?
we often have to tun a horizontal (well minimal fall ) pipe across flat roofs for exactly this reason
if the roofing guys have done their tilt fillet correct there should be no water going to his side.
if you have problems with it shooting your gutter you may need to get deep flow gutters
cheers LLL 
Posted: Wed Jun 11, 2008 4:42 am
by mand4
Thanks for reply, its a pitched roof but there's no guttering on that side(didn't think it needed it there anyway)and have not had any complaints since it was done nearly 5 years ago, until this last month, but don't know if this is due to changes in amount of rainfall or neighbour's new fella or some other problem. He claims its like a waterfall all way along edge of roof tiles, so is flooding his garden, but have lived here 20 years and its always tended to flood in back gardens. My was the same but after having extension done, I now have patio with drainage, so its not a problem for me. I was up the ladder at 5.30am last week when we had a heavy downpour, but couldn't see this 'waterfall' so am at a loss at the moment.
Thanks again.
P.S. everything was passed by local authorities, so if anything was 'not as it should be' wouldn't they not have said anything?
Posted: Wed Jun 11, 2008 6:24 am
by Dave_L
Is observing the area when it is raining an option for you both?
Posted: Wed Jun 11, 2008 6:55 am
by mand4
For me, not really, unless I'm up a ladder looking over the fence. I'm not convinced his flooding is due to rainwater from the roof and if this is the case, his problem will soon become a lot worse because he is in the process of building a raised patio directly above his problem area. So with the runoff from that, to me, spells double trouble.
Thanks for input
Posted: Wed Jun 11, 2008 7:27 am
by lutonlagerlout
a picture would be handy,i can tell straight away from a visual
cheers LLL
Posted: Wed Jun 11, 2008 7:40 am
by mand4
ok will do
cheers again
Posted: Thu Jun 12, 2008 4:11 am
by mand4
Hello again, sry no photo, when I went out to take some, the guy had already re-routed the drainpipe, in some kinda fashion, using various degree turns and elbows, not the easiest route, but still, anyway, we'll see how it works when we get the next downpour.
Thanks again for your advice and time taken, very much appreciated.
Posted: Thu Jun 12, 2008 9:56 pm
by mand4
Sry to be a pain, but am back to needing advice, situation turning a little nasty, even though the pipe's been diverted. Firstly can you tell me what you mean by 'tilt fillet', secondly would you need the photo to be taken from the side angle to show how the roof slopes because if so, carn't get to that side, but from front view you cannot see much. Can you also tell me if the drainpipe needs to be a certain distance from the roof edge, because if it was too close would that cause some run off?
Thanks
Posted: Fri Jun 13, 2008 12:02 am
by lutonlagerlout
tilt fillet is only on a flat roof which you havent got,really need a piccie
LLL