water seepage in new extensiom Information, help and advice on many architecture, self build and design problems and issues

[longlostpoet]

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
un-screeded
nothing when ground is frozen
pump needed to clear floor when raining
~
any suggestions what the solution might be ?[b][/b]

[stoneyboy]

longlostpoet,
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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