Plain Half Round cast iron guttering has been used on many properties in Britain for years, and there is a reason for their continued success. The shape is elegant, balanced and versatile, capable of fitting into any project – from listed properties to stonework cottages, through to barn conversions and new build schemes. No overcomplicated detailing. Proper classic cast iron rainwater design. We also offer Beaded half round, Victorian ogee and Moulded Ogee profiles.
The Apex Heritage Plain Half Round cast iron gutter system is one of our most popular ranges sold throughout the UK. Sand cast from high quality iron in accordance with BS460 standards, the system offers both classic styling and modern consistency. Cast iron gutters and downpipes are available in four sections including 100mm (4"), 115mm (4½"), 125mm (5") and 150mm (6"). Downpipes and cast iron accessories are also available in matching sections and styles.
Factory painted black cast iron guttering will be delivered on a next working day delivery service in the most commonly ordered sizes, depending on availability and cut-off times. Powder coated custom RAL colour cast iron guttering is available and can take up to 7–10 working days from order placement.
Robust, substantial and durable, the Apex Heritage cast iron gutter system continues to be one of the finest products available for heritage and traditional rainwater installation work.
Alumasc Apex 115mm (4.5") Half Round Cast Iron 75mm (3") Gutter Outlet - Primed
Sale price £22.71 Regular price £31.43Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron 65mm (2.5") Gutter Outlet - Black
Sale price £28.15 Regular price £38.94Unit priceAlumasc Apex 100mm (4") Half Round Cast Iron 65mm (2.5") Gutter Outlet - Primed
Sale price £21.05 Regular price £29.12Unit priceAlumasc Apex 100mm (4") Half Round Cast Iron 90 degree Gutter Angle - Primed
Sale price £21.72 Regular price £30.05Unit priceAlumasc Apex 100mm (4") Half Round Cast Iron 135 degree Gutter Angle - Primed
Sale price £21.72 Regular price £30.05Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron Internal Stop End - Primed
Sale price £9.41 Regular price £13.01Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron Fascia Bracket - Primed
Sale price £8.09 Regular price £11.18Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron External Stop End - Primed
Sale price £9.41 Regular price £13.01Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron 90 degree Gutter Angle - Primed
Sale price £26.40 Regular price £36.53Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron 65mm (2.5") Gutter Outlet - Primed
Sale price £22.71 Regular price £31.43Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron 135 degree Gutter Angle - Primed
Sale price £26.40 Regular price £36.53Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron Internal Stop End - Black
Sale price £11.65 Regular price £16.12Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron Fascia Bracket - Black
Sale price £9.52 Regular price £13.17Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron External Stop End - Black
Sale price £11.65 Regular price £16.12Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron 90 degree Gutter Angle - Black
Sale price £32.76 Regular price £45.33Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron 75mm (3") Gutter Outlet - Black
Sale price £28.15 Regular price £38.94Unit priceAlumasc Apex 115mm (4.5") Half Round Cast Iron 135 degree Gutter Angle - Black
Sale price £32.76 Regular price £45.33Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron 75mm (3") Gutter Outlet - Primed
Sale price £45.40 Regular price £62.82Unit priceAlumasc Apex 150mm (6") Half Round Top Fix Rafter Bracket for Cast Iron Gutter - Black
Sale price £13.74 Regular price £19.02Unit priceAlumasc Apex 150mm (6") Half Round Top Fix Rafter Bracket for Cast Iron Gutter - Zinc Plated
Sale price £13.66 Regular price £18.89Unit priceAlumasc Apex 150mm (6") Half Round Side Fix Rafter Bracket for Cast Iron Gutter -Black
Sale price £13.74 Regular price £19.02Unit priceAlumasc Apex 150mm (6") Half Round Side Fix Rafter Bracket for Cast Iron Gutter - Zinc Plated
Sale price £13.66 Regular price £18.89Unit priceAlumasc Apex 150mm (6") Half Round Rise & Fall Bracket for Cast Iron Gutter - Black
Sale price £18.51 Regular price £25.61Unit priceAlumasc Apex 150mm (6") Half Round Rise & Fall Bracket for Cast Iron Gutter - Zinc Plated
Sale price £14.92 Regular price £20.63Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron Gutter Union - Black
Sale price £27.99 Regular price £38.71Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron Gutter Union - Primed
Sale price £22.65 Regular price £31.34Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron 100mm (4") Gutter Outlet - Black
Sale price £56.36 Regular price £77.96Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron 100mm (4") Gutter Outlet - Primed
Sale price £45.40 Regular price £62.82Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron 75mm (3") Gutter Outlet - Black
Sale price £54.73 Regular price £75.71Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron Fascia Bracket - Black
Sale price £13.12 Regular price £14.54Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron Fascia Bracket - Primed
Sale price £9.15 Regular price £12.66Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron Internal Stop End - Black
Sale price £15.73 Regular price £21.77Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron Internal Stop End - Primed
Sale price £12.67 Regular price £17.52Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron External Stop End - Black
Sale price £15.73 Regular price £21.77Unit priceAlumasc Apex 150mm (6") Half Round Cast Iron External Stop End - Primed
Sale price £12.67 Regular price £17.52Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron Gutter Union - Black
Sale price £24.99 Regular price £34.57Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron Gutter Union - Primed
Sale price £20.04 Regular price £27.72Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron 75mm (3") Gutter Outlet - Black
Sale price £38.50 Regular price £45.14Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron 75mm (3") Gutter Outlet - Primed
Sale price £26.25 Regular price £36.31Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron Fascia Bracket - Black
Sale price £11.65 Regular price £13.68Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron Fascia Bracket - Primed
Sale price £8.47 Regular price £11.72Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron Internal Stop End - Black
Sale price £13.73 Regular price £16.12Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron Internal Stop End - Primed
Sale price £9.41 Regular price £13.01Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron External Stop End - Black
Sale price £13.73 Regular price £16.12Unit priceAlumasc Apex 125mm (5") Half Round Cast Iron External Stop End - Primed
Sale price £9.41 Regular price £13.01Unit priceAlumasc Apex 100mm (4") Half Round Cast Iron Gutter Union - Primed
Sale price £14.37 Regular price £19.87Unit priceAlumasc Apex 100mm (4") Half Round Cast Iron 75mm (3") Gutter Outlet - Primed
Sale price £21.05 Regular price £29.12Unit priceAlumasc Apex 100mm (4") Half Round Cast Iron Fascia Bracket - Primed
Sale price £7.66 Regular price £10.59Unit priceAlumasc Apex 100mm (4") Half Round Cast Iron Internal Stop End - Primed
Sale price £7.40 Regular price £10.23Unit priceAlumasc Apex 100mm (4") Half Round Cast Iron External Stop End - Primed
Sale price £7.40 Regular price £10.23Unit price

Why Choose Plain Half Round Cast Iron Guttering?
Cast Iron Rainwater Frequently Asked Questions
How Quick Is Delivery?
How Quick Is Delivery?
Popular painted black cast iron guttering sizes are typically available for next working day delivery across the UK when ordered before 11:30am, subject to stock availability.
Primed systems are stocked across selected sizes, while custom RAL powder coated cast iron guttering is usually supplied within 7–10 working days.
What Makes Apex Heritage Different From Cheaper Cast Iron Systems?
What Makes Apex Heritage Different From Cheaper Cast Iron Systems?
We think the consistency is noticeably better. Apex Heritage cast iron guttering is manufactured using traditional sand cast methods alongside modern quality control standards, giving cleaner alignment, more reliable fitment, and a far better painted finish compared with lower-grade imported systems.
What Size Cast Iron Guttering Do I Need?
What Size Cast Iron Guttering Do I Need?
For most standard residential properties, 115mm (4½”) Half Round cast iron guttering is the most commonly used size. Larger roofs, commercial buildings, or areas with heavier rainfall may benefit from 125mm or 150mm systems. If you're replacing existing guttering, matching the current profile and outlet size is usually the safest option.
Is Cast Iron Better Than Cast Iron Effect Plastic Guttering?
Is Cast Iron Better Than Cast Iron Effect Plastic Guttering?
They’re completely different products really. Plastic cast iron effect guttering is lighter and cheaper upfront, but genuine cast iron is significantly stronger, longer lasting, and far more authentic visually. Proper cast iron guttering can last well over 40 years and suits heritage buildings far better than imitation systems.
Are Custom Colours Available?
Are Custom Colours Available?
Yes. Custom RAL colour cast iron guttering is available for heritage and architectural projects requiring a more bespoke finish. These systems are professionally powder coated in the UK with typical lead times of 7–10 working days.
How Heavy Is Cast Iron Guttering?
How Heavy Is Cast Iron Guttering?
Cast iron guttering is substantially heavier than plastic or aluminium systems, which is part of why it lasts so long. Proper bracket spacing and secure fixing into suitable surfaces is important for long-term performance.
How Long Does Cast Iron Guttering Last?
How Long Does Cast Iron Guttering Last?
High quality cast iron guttering systems regularly achieve service lives exceeding 40 years when correctly installed and maintained. Many older cast iron systems remain in use well beyond that.
What Happens If I Order The Wrong Parts?
What Happens If I Order The Wrong Parts?
Returns are accepted within 30 days on standard stock items. Orders returned within 14 days are generally accepted without a restocking charge, while returns after 14 days may be subject to a handling fee depending on the products ordered.
Do You Offer Trade Support?
Do You Offer Trade Support?
Yes. We work closely with builders, roofing contractors, installers, architects, and developers needing specification support, bulk pricing, and reliable lead times across larger cast iron rainwater projects.