Cast Iron Deepflow Half Round Guttering

Hargreaves Deepflow is available in 100 x 75mm (4" x 3") and 125 x 75mm (5" x 3").

Both of these have the same deep half round design, but the larger 125mm provides you with extra capacity and a more substantial appearance on the roofline. This can certainly make sense for larger properties and commercial buildings with long roof lines.

The smaller 100 x 75mm profile is slightly more aesthetically pleasing and may work well for you if you are looking for a deeper gutter but do not want it to look too bulky.

When replacing an existing gutter system, it is important to measure both the width and depth rather than just the width alone. Deepflow guttering depends upon both measurements, so taking just one could mean ordering the wrong type of guttering.

If you are unsure, our Cast Iron Guttering Sizes Explained guide is a useful place to start.

100 x 75mm or 125 x 75mm?

Generally speaking, the choice will be determined by the size of the roof and the amount of water that needs to be dealt with. In cases where the roof area is reasonable but you need a little extra depth than the half round profile, the 100 x 75mm Deepflow would be the neater choice.

However, in cases where the roof area is large or where there are longer elevations, the 125 x 75mm Deepflow would be the better choice. That said, we would not make our choice based purely on aesthetics.

The roof area, number of outlets, gutter fall and downpipe locations will all determine the final configuration. If you can provide us with plans or roof measurements, we can assist you in determining the appropriate gutter and downpipe sizes prior to ordering.

Why Choose Deepflow Instead of Standard Half Round?

The key lies in the name itself!

Deepflow guttering features a deeper profile than the conventional half round gutter, which provides additional space for holding rainwater along the actual run.

It can come handy for:

• Large residential roof conversions
• Commercial buildings
• Buildings of heritage that feature long gutter runs
• Roofing systems with limited outlet points
• Places where conventional guttering might prove to be under-sized

It also possesses a slightly more "solid" appearance compared to the conventional half round gutter, which in turn, makes it an excellent choice for larger buildings.

If your project doesn’t need the extra depth, look at our Plain Half Round Cast Iron Guttering instead. That range gives you a more traditional shallow half round profile in several sizes.