Description
A box gutter carries far more water than a standard uPVC profile and suits the clean, square lines of flat-roofed extensions, garden rooms and commercial buildings — and in powder-coated aluminium it will outlast plastic guttering several times over without fading or sagging. This 135 x 100mm system covers the complete run: 3m gutter lengths plus every fitting needed to turn corners, connect downpipes and close the run.
- 135mm wide x 100mm deep rectangular box profile, powder-coated aluminium
- Choose each component: 3m lengths, jointers, 90° and 135° angles, three outlet sizes, stop ends
- Textured Black or Anthracite Grey (RAL 7016) to match modern joinery
Specification
| Profile | Box (rectangular), 135mm x 100mm |
|---|---|
| Length | 3m per gutter length |
| Material | Powder-coated aluminium |
| Colours | Textured Black, Anthracite Grey (RAL 7016) |
| Outlets | 63mm dia, 76mm dia, 72 x 72mm square |
| Angles | 90° and 135° |
Frequently asked questions
What do I need for a straight run? Gutter lengths to cover the run, one jointer per join, a stop end for each closed end, and one outlet per downpipe position. Angles are only needed where the run turns a corner.
Which outlet size? Match the outlet to your downpipe: 63mm or 76mm for round downpipes, 72 x 72mm for square. On most domestic extensions one 63mm outlet per 25m² of roof is a sensible starting point.
Why aluminium over uPVC? Aluminium won't become brittle, fade or distort in sunlight, holds its colour for decades, and spans between brackets without sagging — it's the specification choice for buildings meant to last.
How is it jointed? Lengths connect with the jointer piece and a suitable gutter sealant for a watertight joint.
Prefer a curved profile? See our Aluminium Half Round Gutter System. Draining a flat roof through the deck instead? Use our aluminium roof drain outlet.
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