Box gutters and roof drainage in Box Hill NSW
A box gutter sits within the roof rather than at its edge, carrying water in a concealed position. That is why it is used on the roof forms common in this precinct, and why it is unforgiving. A box gutter is only as good as three things: the sump that takes the water out, the overflow that handles what the sump cannot, and the fall between them. We have recorded one box gutter discharging into another, sumps and overflows missing or undersized, discharge landing on a flashing, and water ponding rather than draining. When a box gutter backs up, the water goes inside the building.
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A box gutter runs within the roof, not at its edge, so a failure discharges internally.
One box gutter discharging into another puts flow into a gutter never sized for it.
High capacity overflows exist so a blockage does not become an internal flood.
Discharge onto a flashing rather than into a sump undermines the detail beneath it.
Ponding in a box gutter is a fall problem, not a cleaning problem.
More about Box Hill
- Building a new home in Box Hill NSW
- Buying a home in Box Hill NSW
- Growth and development in Box Hill NSW
- Certifiers, council and building disputes in Box Hill NSW
- Ground conditions and slabs in Box Hill NSW
- Waterproofing pinholes and wet areas in Box Hill NSW
- Common building defects in Box Hill NSW
Written by our local inspection team from work carried out in Box Hill. Licensed building practitioners.
