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The Problem.

Externally adhesive membrane  tanked new-build basement floods upon completion, with water pressure causing build-up within the inner hollow block  walls.

Should the external and below floor waterproofing be opened up for repair, causing extensive disruption, or should Basement Systems water control be considered?

The Solution

Yes, and in this case decorative stone flags had been laid upon the concrete slab, so the periphery flags were removed and holes drilled in the bottom of the block-work to allow the water out.

See it standing where the flags were removed? It couldn't wait to get out once the build-up of ground water was released. 

Control The Water

A Basement Systems^TM dual mains powered and battery backup UltraSump^TM  was installed, with WaterGuard^TM  sub-floor drainage channels installed around the periphery.

A Drying Basement!

A skirt of Delta MS cavity drainage membrane was added to compensate for the stone flags bridging the channels, allowing the basement to be used again.

In waterproofing terms, WaterGuard^TM  sub-floor drain drainage channels are akin to reinventing the wheel.

Don't doubt it!