Solutions for surface water runoff aren't optional either — it’s covered by Part H of the Building Regulations for new homes.
GETTING STARTED
First ensure the ground beneath is permeable, which will need a percolation test. A soakaway has to let the water soak away if it is to be successful.
To do a percolation test, dig a hole in your garden measuring about 300mm square and 300mm deep. Pour at least 10 litres of water into that hole. If the water has soaked away within about two hours then soakaways should work very well.
However, if the water sits in the hole without draining, then you will have to explore further. First consider a deeper percolation test, going down to a depth of a metre. If the water still stands without draining away, then you will have to seek an alternative destination for your rainwater drainage.
Instructions for doing a more accurate soil percolation test, as well as for installing soakaway crates, can be found at www. drainage pipe. co.uk
HOW TO CONSTRUCT A SOAKAWAY
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