Hi, I'm extending my house and as part of this I want to rationalise my guttering and rain water drainage. Currently the rainfall onto the 2nd storey roof drains onto a 1st storey roof terrace. This water (added to the rain falling on the roof terrace) then exits via a gully at the far end of the roof terrace. This means that the 2nd storey roof rainfall must travel all the way across the 1st storey roof terrace on its way to the ground. It always ponds en route though.
The current guttering downpipe from the 2nd storey roof runs very close to the bathroom drains and I would like to be able to join the two together so that the rainwater and foul water would run in a combined drain into the existing foul water drain. I understand that this is not a goer however and I'm keen to understand why as my builder couldn't tell me why.
The situation is complicated by the fact that the foul water drain goes underground on a neighbours land, just the other side of the party wall. Otherwise running a new rainwater drain nearby would be an obvious option. However, as this new drain would need a new gully on my neighbours land I'm trying to avoid that option.
The other way would be to run a long horizontal rainwater drain across the roof terrace.
any ideas?
It's difficult to explain all this in words, let me know if you need a piccie!!
The current guttering downpipe from the 2nd storey roof runs very close to the bathroom drains and I would like to be able to join the two together so that the rainwater and foul water would run in a combined drain into the existing foul water drain. I understand that this is not a goer however and I'm keen to understand why as my builder couldn't tell me why.
The situation is complicated by the fact that the foul water drain goes underground on a neighbours land, just the other side of the party wall. Otherwise running a new rainwater drain nearby would be an obvious option. However, as this new drain would need a new gully on my neighbours land I'm trying to avoid that option.
The other way would be to run a long horizontal rainwater drain across the roof terrace.
any ideas?
It's difficult to explain all this in words, let me know if you need a piccie!!