Description
A half-round gutter copes fine on a house roof. It runs out of capacity fast on a large steel-portal-frame shed, grain store or workshop, where a long, wide roof plane can dump a genuinely large volume of water into the gutter in a short, heavy downpour. That's the job this deep box-profile gutter is built for — a wide, flat-bottomed galvanised steel channel with far more cross-sectional area than a domestic half-round or ogee profile, designed to sit under the eaves of exactly the kind of agricultural and industrial buildings this store's box profile steel and fibre cement roofing sheets are used on.
The box profile also self-supports better across long spans than a half-round gutter of comparable size, which is why it's the standard choice UK agricultural building contractors reach for on barns, poultry housing and steel-clad commercial units rather than adapting a domestic system to a job it wasn't sized for.
Specification
| Component | Profile | Material & gauge | Length |
|---|---|---|---|
| Box gutter length | Box profile, approx. 150mm internal width | Galvanised steel, 2mm | 4.572m |
| Universal outlet | To suit 110mm downpipe | Galvanised steel | — |
Approximate weight per gutter length: around 31.5kg — plan handling and roof access accordingly on a self-build or contractor installation.
Installation notes
Lengths are bolted and lapped, not push-fit — budget for M10 galvanised bolts, nuts, washers and a butyl jointing tape at each join (standard roofline fixings, sold separately by roofline hardware suppliers) rather than assuming push-clip connections. The outlet accepts a standard 110mm round downpipe. Fix to the building's purlins or eaves beam per the structure's own engineering — box gutters on long agricultural spans are usually specified by the building's structural drawings rather than a generic fixing centre.
FAQ
How is this different from your 150mm half round agricultural gutter?
This is a deeper, flat-bottomed box profile with more water-carrying capacity, suited to bigger roof spans and heavier peak rainfall — see our Agricultural & Industrial Galvanised Steel Guttering System for the half-round alternative on smaller runs.
What downpipe does the outlet fit?
A standard 110mm round downpipe. This listing covers the gutter and outlet only — source a 110mm downpipe length to suit your building height and preferred material.
Do I need anything else to join lengths?
Yes — joints are bolted and sealed on site with M10 fixings and a butyl jointing tape, not push-fit. These are standard roofline consumables and aren't included in this listing.
Is a stop end available?
Not currently — the only stop end we could verify for this exact gutter profile was out of stock at the time of publishing. We'll add it once a live, in-stock source is confirmed; in the meantime a fabricated or bolt-on end cap can be sourced locally by a roofing contractor.
What roof types does this pair with?
It's a natural match for our Box Profile Steel Roofing Sheets and Fibre Cement Big 6 Roofing Sheets, both commonly used on the same agricultural and industrial buildings.
Ordering for a full building run? Contact us before ordering to help calculate the number of lengths and outlets your roof perimeter needs.
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