Hi all,
Does anyone know what type of agi drain is best for clay soils and does it need a plastic liner like builders film at the bottom for the pipe to sit on?
Much appreciated for any advice.
AGI drains
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It doesn't really matter which sort of pipe as long as it doesn't have a geotextile 'Sock' around it and it is surrounded by at least 100mm of gravel.
See this link for more information Aggi Drains
See this link for more information Aggi Drains
Thanks, does it need a plastic liner to stop water from soaking below beneath the pipe?
No liner required
Okay, thank you
Kitty1
If the agi pipes is not sitting in clay then will not be as effective due to water will seep below the agi pipe level usually
along the clay base if is relatively shallow.So you need to know the depth of clay and the depth of the proposed agi pipe
A plastic liner along one side of the trench can be a very effective barrier to any moisture flow as long as it is on the side that you
want to protect e.g. the house side. They are called cut off drains much more effective then standard agi drain.
Geofabric will eventually block up with silt but might take a bit longer than not having it.
There is another type of drain that claims never to block and that is a capillary drain.
If the agi pipes is not sitting in clay then will not be as effective due to water will seep below the agi pipe level usually
along the clay base if is relatively shallow.So you need to know the depth of clay and the depth of the proposed agi pipe
A plastic liner along one side of the trench can be a very effective barrier to any moisture flow as long as it is on the side that you
want to protect e.g. the house side. They are called cut off drains much more effective then standard agi drain.
Geofabric will eventually block up with silt but might take a bit longer than not having it.
There is another type of drain that claims never to block and that is a capillary drain.
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