Waterproof decks – blocked drainage outlets
Cause
Debris obstructs water flow
Repair
- remove obstructions from the drainage outlet
Cause
The drainage outlet is not large enough for the volume of water the deck/balcony receives
Repair
- enlarge the drainage outlet
- add a second drainage outlet if there is only one outlet. A fully enclosed deck should have at least two drainage outlets with independent overflows
- ensure that the drainage outlet is at least 50 mm below deck level
- remove a solid balustrade and replace with an open balustrade on at least one side of the deck