Basedrain

Clearly any moisture gathering in the air gap behind a wall membrane will want to run down to floor level, so why not use this behaviour to collect and remove the water by forming a channel around the perimeter of the room to accommodate this, laid in pea gravel and with the Base Drain bedded into the pea gravel. The Base Drain can then either feed into a sump to be pumped away (see photo) or if available, feed directly to an external drain.