Posted: Wed Jun 29, 2016 4:04 am
Hello all,
We've commenced the final part of our house renovation and are currently doing a patio on the back garden. I've added a drawing for ease. The garden naturally slopes towards the house and has been landscaped via digger to get to where we are now. A retaining wall has been added 6m from the house and has land drainage at the rear to stop it retaining water 9 the soil turns to red clay at approx .5m down.
A line of ACO drains have been placed against the rear of the house (below DPC) in order to drain the patio, these will be draining into a soakaway that is yet to be created. There is an exsisting bottle gully that runs under the house that the ACO drains have been tapped into to effectively drain half or a little more of the patio in theory.
There is also a pre-exisiting downpipe from the extension which drained into said bottle gully but is now piped into the ACO's and then subsequently the gully.
I am aware that a soakaway or alternative system will be required due to the sheer volume of water that (once a year) will pass through the pipe work and need to go somewhere. The second diagram shows the proposed system which is to remove the poorly placed soakaway that is currently .5m from the house and is presumedly blocked or as near to blocked as it can get.
The ACO drains will be connected to a long run of underground pipe that will also join the house downpipe on its way to the front of the property. This will then drain into attenuation or soakaway crates that will be placed under the front drive. This soakaway will also serve the front house and extension downpipe which at present drains onto the driveway.
From a few quick calculations its an area of about 140m2 if I surmise that half of the patio and half of the extension roof will drain into the bottle gully at the rear of the house.
This works out at a very generous 2.5m3 soakaway that will engulf the front of the property and cost a fair whack to put in the ground.
The area on the front is approx 8.5m x 12.7m which means that to observe the 5m from a boundary or building line "Rule" would be impossible.
As I've said, we are on clay ground but as of yet I haven't dug a trial hole to do a percolation test.
I'm after some advice and another pair of eyes to look over the proposed plan and suggest an alternative drainage solution. Could I install a 1.5m3 (ish) soakaway near the front of the garden and then have an overflow which connects into the combined system that is present on the front of the house for that once a year downpour? Or is this frowned upon?
Thanks in advance, Matt
We've commenced the final part of our house renovation and are currently doing a patio on the back garden. I've added a drawing for ease. The garden naturally slopes towards the house and has been landscaped via digger to get to where we are now. A retaining wall has been added 6m from the house and has land drainage at the rear to stop it retaining water 9 the soil turns to red clay at approx .5m down.
A line of ACO drains have been placed against the rear of the house (below DPC) in order to drain the patio, these will be draining into a soakaway that is yet to be created. There is an exsisting bottle gully that runs under the house that the ACO drains have been tapped into to effectively drain half or a little more of the patio in theory.
There is also a pre-exisiting downpipe from the extension which drained into said bottle gully but is now piped into the ACO's and then subsequently the gully.
I am aware that a soakaway or alternative system will be required due to the sheer volume of water that (once a year) will pass through the pipe work and need to go somewhere. The second diagram shows the proposed system which is to remove the poorly placed soakaway that is currently .5m from the house and is presumedly blocked or as near to blocked as it can get.
The ACO drains will be connected to a long run of underground pipe that will also join the house downpipe on its way to the front of the property. This will then drain into attenuation or soakaway crates that will be placed under the front drive. This soakaway will also serve the front house and extension downpipe which at present drains onto the driveway.
From a few quick calculations its an area of about 140m2 if I surmise that half of the patio and half of the extension roof will drain into the bottle gully at the rear of the house.
This works out at a very generous 2.5m3 soakaway that will engulf the front of the property and cost a fair whack to put in the ground.
The area on the front is approx 8.5m x 12.7m which means that to observe the 5m from a boundary or building line "Rule" would be impossible.
As I've said, we are on clay ground but as of yet I haven't dug a trial hole to do a percolation test.
I'm after some advice and another pair of eyes to look over the proposed plan and suggest an alternative drainage solution. Could I install a 1.5m3 (ish) soakaway near the front of the garden and then have an overflow which connects into the combined system that is present on the front of the house for that once a year downpour? Or is this frowned upon?
Thanks in advance, Matt