112mm Half Round is the standard residential rainwater profile in the UK — the most widely cross-compatible system, and the right choice for most homes, garages and extensions.
Key specifications
| Profile | 112mm Half Round |
| Gutter width | 112mm |
| Downpipe | 68mm round |
| Flow capacity (level) | 1.90 l/s |
| Bracket spacing | 800–1000mm |
Best suited to
- Standard homes, extensions and garages
- Like-for-like replacement of existing half round
- Properties where matching to neighbouring systems matters
Fitting notes
Space fascia brackets at 800–1000mm centres on a sound timber or PVC fascia (reduce to 800mm on exposed sites).
Fix an extra bracket within 150mm of every union, angle, running outlet and stop end, and lay the gutter to a slight fall of about 3mm per metre (1:350) towards the outlet. Leave the manufacturer's 6–10mm expansion gap at union joints, and space downpipe clips no more than 1.8m apart with support near the top and bottom of the run.
Colours
White, Black, Brown, Grey and Anthracite Grey.
Compatibility
The most widely cross-compatible residential profile — generally interchangeable with Brett Martin, FloPlast, Freeflow, Hepworth, Hunter, Marley, Marshall Tufflex, Osma/Wavin and Polypipe half round.
Always confirm the profile before mixing parts — see the gutter compatibility guide.
Size your job
Not sure how much you need? Use our capacity calculator and project estimator to size the system and build a parts list.
Get a Quote
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- Trade pricing — we won't be beaten
- Fast quotes — usually within 24 hours
- Collection from any of our 21 UK branches
- Local delivery available