Posted: Tue May 27, 2008 11:40 pm
Need some help on working out how to avoid digging out my entire garden!
I am laying a patio (sandstone, 3m by 4m width, 150mm depth of construction, fall away from house) at the back of the house against the extension which is the full width of the garden. The extension has a suspended floor and folding doors that open nearly the full width. The intention is to step out of the extension onto the patio. The DPC is 155mm below the finished internal floor level but is low relative to the garden (almost same height).
I realise that there is a requirement to set the patio 150mm below the DPC but this is just not practical (would undermine neighbours gardens/side wall as well). I have looked over your DPC page and thought that the linear drain solution could work but if I position this 75mm below the DPC the step out of the extension to the patio would be 230mm - with 2 little ones running around this is a bit too much of a step. I want to avoid a gully as think this would be dangerous for the kids.
Can you position the linear drain at the DPC level and then treat the brickwork above to get around the splashback? Any other solutions?
Also, I was intending to connect the linear drain to the rainwater pipe coming from the extension roof and main roof which runs to a soakaway at end of the garden - is this OK? concern is that in heavy rain could overload and then water flows back into the linear drain and floods patio?
Any advice would be greatly appreciated.
I am laying a patio (sandstone, 3m by 4m width, 150mm depth of construction, fall away from house) at the back of the house against the extension which is the full width of the garden. The extension has a suspended floor and folding doors that open nearly the full width. The intention is to step out of the extension onto the patio. The DPC is 155mm below the finished internal floor level but is low relative to the garden (almost same height).
I realise that there is a requirement to set the patio 150mm below the DPC but this is just not practical (would undermine neighbours gardens/side wall as well). I have looked over your DPC page and thought that the linear drain solution could work but if I position this 75mm below the DPC the step out of the extension to the patio would be 230mm - with 2 little ones running around this is a bit too much of a step. I want to avoid a gully as think this would be dangerous for the kids.
Can you position the linear drain at the DPC level and then treat the brickwork above to get around the splashback? Any other solutions?
Also, I was intending to connect the linear drain to the rainwater pipe coming from the extension roof and main roof which runs to a soakaway at end of the garden - is this OK? concern is that in heavy rain could overload and then water flows back into the linear drain and floods patio?
Any advice would be greatly appreciated.
