Box gutters are used on roofs where water collects in one area. If they don’t drain, water can get into the roof space.
Box gutters are common on larger roofs and at points where roof sections meet. Water runs into these areas during rain.
They sit within the roof rather than on the edge like standard gutters. Water enters the box gutter and leaves through downpipes or overflow points. From there it goes into stormwater.
The amount of roof feeding into the gutter affects how it needs to be set up. If water can’t move through, it will sit or spill during rain.
Box gutters are usually made from Colorbond or Zincalume and formed to suit the roof layout.
Box gutter problems usually show up when it rains heavily. Water may pool, overflow or leak into the building.
Common causes include rust, blockages, poor fall or incorrect sizing. Some gutters can be repaired. Others are better replaced to stop repeat issues.
The condition of the gutter and how it drains usually decides what happens next.
Most failures relate to drainage. If water can’t leave fast enough, it rises inside the gutter.
Heavy rain makes this obvious. Without a clear outlet or overflow point, water can enter the roof cavity.
Box gutters are installed using materials suited to the building. Colorbond and Zincalume are common.
The gutter needs to fall toward the outlet. Overflow points and downpipe connections need to be clear so water can move through.
If water is sitting in a box gutter or entering the building, the setup usually needs to be checked on site.
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