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water seepage in new extensiom

Postby longlostpoet » Sun Feb 28, 2010 4:57 pm

new extension.
built into gentle slope upwards away from extension.
concrete raft over membrane
water entering when raining and or damp conditions outside.
one rear & side corner only
nothing when ground is frozen
pump needed to clear floor when raining
any suggestions what the solution might be ?[b][/b]
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Postby stoneyboy » Mon Mar 01, 2010 9:26 pm

Lower the ground level where the problem exists - you may even have to instal a french drain in the lowered ground level.
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