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Permimeter Drainage and Concreting Fall Under Window

Postby Deathstar1991 » Thu Jul 14, 2022 2:07 pm

Hello,

Had some problems with some tradesman and had to do some bits myself. Had the building inspector help out in areas as he could see I go screwed.

I'm in the last stretch and need a bit of advice. The path on the left is the neighbours and the brick garden wall is going back up. The external of the new clockwork has been tanked. Can I concrete under the window with a fall going into an aco drain running parralel under the window?

any suggestions?

Thanks
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Deathstar1991
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Postby stoneyboy » Fri Jul 15, 2022 8:53 pm

Hi deathstar1991,
Suggest that to make good you extend the accodrain and utilise the surface water connection (where the downpipe and gutter are discharging). Run a new pipe from the accodrain channel into the surface water connection. Concrete in with a weak mix. Fit an access plate on the top of the black pipe for maintenance and lay slabs to make good.
Regards S
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Postby Deathstar1991 » Sat Jul 16, 2022 9:37 am

stoneyboy wrote:Hi deathstar1991,
Suggest that to make good you extend the accodrain and utilise the surface water connection (where the downpipe and gutter are discharging). Run a new pipe from the accodrain channel into the surface water connection. Concrete in with a weak mix. Fit an access plate on the top of the black pipe for maintenance and lay slabs to make good.
Regards S



So carry the aco drain along and feed it into the inspection chamber?...

As the aco is set about 5/6 inches from wall running parallel what would I put behind here? Gravel?

Thanks
Deathstar1991
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Postby stoneyboy » Sun Jul 17, 2022 8:54 pm

Hi deathstar1991,
Provided the accodrain will be below DPC level, fill behind the acco channel with a weak concrete mix - you don't want the channel to move.
Regards S
stoneyboy
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Postby Deathstar1991 » Mon Jul 18, 2022 11:40 am

The dpc is bellow ground by about 3/4 inches. That's why the wall has been tanked internally and externally.
Deathstar1991
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Postby stoneyboy » Mon Jul 18, 2022 9:33 pm

Hi deathstar1991,
Tanking will help but with your DPC below ground level you are likely to experience rising damp.
Regards S
stoneyboy
Rank: Project Manager
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