Custom flashing
Box gutter
Box gutters for high-capacity internal drainage between roof planes or behind parapets.
A box gutter is a wide, deep internal gutter used where standard eaves gutters cannot carry the flow - between roof planes or behind a parapet. Sizing must suit the catchment and is best confirmed by the trade desk.
Draft the sole width, upstand heights and any sumps in the flashing tool. Box gutters are quote-only; we verify capacity, falls and overflow provisions before supply.
Typical applications
- Internal roof drainage
- Behind parapets
- Between roof planes
How pricing works
Custom flashings are priced by the lineal metre against the developed girth, with the material, thickness, colour and number of bends factored in. Draft your exact profile to see an indicative price, then the trade desk confirms the firm price and folding schedule before supply.
Draft your box gutter now
Open the flashing designer with this profile loaded. Adjust the widths, bends and finish, see the girth, weight and indicative price, then add it straight to a quote.
Open the flashing designer