Cast Iron Gutter - Half Round

PBSL's Cast Iron Guttering, supplied by Yorkshire-based foundry Hargreaves, is produced using traditional procedures to BS 460 and offered in four different sizes —100mm, 115mm, 125mm, and 150mm. It is available in either a black gloss paint finish or a grey primed option, which gives protection on-site before the final paint coatings are applied on-site in your own choice of colour. 

Half Round Cast Iron Gutter has been used for generations as a guttering material can be in the UK. In use since the Victorian era, this variety of gutter epitomises a classic tradition that has existed for over a century, throughout diverse developments in structural technology. Sturdy, durable, and able to be totally recycled, Cast Iron is a widely used material in every type of application in the UK building trade due to its strength and longevity.

Much preferred by public bodies and governmental buildings, it is equally at home on private houses, churches, schools and colleges. Cast Iron Gutters are also an extremely popular selection for listed buildings.


  • System is produced to BS460:1964 in the UK
  • Available in either Black Painted or Grey Transit Primer Finish
  • Lasts over 40 years when installed correctly
  • Wide range of shapes — Half RoundBeaded Half RoundBox SectionDeepflow — and three differing decorative Ogee designs
  • Three typical sizes of downpipes available: 65mm (2 1/2"),  75mm (3") and 100mm (4")
  • Excellent assortment of Ornamental Hoppers to choose from


Cast Iron is a remarkably durable material — many authentic installations from as early as the Victorian period still exist within the UK in, around the North of England and London in particular. When maintained accurately, Cast Iron Guttering outlives all competing products made from alternative materials. 

Because Cast Iron is connected to tradition, it is used especially well on period-style properties, from Victorian terraces to one-off houses. As well as this, it is the most-used guttering material on listed buildings; a large number of planning officers refuse to accept alternative materials. Iron is sourced naturally, so it is completely recyclable — combine this with its incredibly long lifespan, and Cast Iron can be justifiably seen as a truly environmentally friendly material.


  • All gutters and downpipes are centrifugally cast, guaranteeing totally straight lengths, an even surface finish, and consistent metal thickness throughout the gutter/pipe length.
  • Internal flow of the gutter/pipe is both efficient and unobstructed.
  • Hargreaves Foundry utilises a traditional sand moulding method, in which they have over 140 years’ experience – this gives all fittings a consistent texture free of obvious joint lines.

For more details, check out our guides and tips to see why Hargreaves guttering stands out from competitors.

Additional finishes/services are also available, including:

  • Premier extra paint finish – a high gloss, two pack PU black paint finish that eliminates the need for painting the lengths on site. These can also be painted to any RAL or BS colour to suit your requirements.
  • Premier extra coastal finish – a heavy duty version of the premier extra finish, for use in areas within approx. 5 miles of a coastline. Ensures durability of the finish & quality of the gutters.
  • Bespoke manufacture – if you’re having trouble finding a system that fits your requirements, Hargreaves Foundry also offers bespoke manufacture of products. With their own foundry and fabrication facilities onsite, they can replication any existing rainwater pipe or create a new system to fit your requirements (from drawings/samples)

To find out more about these additional services and finishes, please contact our team.


The majority of PVC Gutter manufacturers incorporate adaptors to half round cast iron in their collection. These adaptors typically consist of a compressed rubber seal, making an impermeable joint by tightening a PVC strap, normally with a nut and bolt assembly. Also available are adaptors to Cast Iron Ogee, which attach the PVC gutter to the metal by using a nut and bolt through the gutter section, and furthermore make the joint by using silicon sealant.


Every Cast Iron Gutter and Downpipes is available in 1830mm length, with pre-drilled openings which allow for nut, bolt, and silicon fastening. 

Full instructions for installation that are easy to follow on-site can be found in our Guides & Tips section. 

If you instead merely want more information about Cast Iron Guttering before placing an order, we have composed a collection of articles that will aid you in your decision. Click here to see our top tips for buying Cast Iron Guttering and our report on the features and benefits of Cast Iron Guttering


Alongside the most common and popular black, we also offer all of our cast iron gutter profiles in a primer coating option. This primer provides a surface to which paints can easily adhere, allowing these gutters to be coated with any colour of paint, provided that the type of paint chosen will not cause damage to the initial primer coating. There are a few other precautions that must be taken when purchasing and installing primed guttering, please see our full guide for more information.


For details on delivery and returns of this product range, please consult the Delivery & Returns tab.

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