With such a wide variety of cast iron gutter profiles available, it can be hard to tell the difference in various measurements between them. In the table below you will find the internal width and overall depth as well as the overall and effective length for each profile. We've also included the flow rate for each profile, which is important to take into account; as it will inform you on what square metre roof size the guttering can support.
Half Round
It should be noted that on beaded half-round cast iron gutters, the bead extends 8mm in total on either side of the profile.
| Profile |
Internal Width |
Overall Depth |
Length |
Flow Rate |
| 100mm Standard Half Round |
100mm |
41mm |
1879mm (1829mm) |
0.55L/s |
| 115mm Standard Half Round |
115mm |
50mm |
1879mm (1829mm) |
0.79L/s |
| 125mm Standard Half Round |
125mm |
52mm |
1879mm (1829mm) |
1.09L/s |
| 150mm Standard Half Round |
150mm |
76mm |
1879mm (1829mm) |
1.83L/s |
| 100mm Beaded Half Round |
100mm |
41mm |
1879mm (1829mm) |
0.55L/s |
| 115mm Beaded Half Round |
115mm |
50mm |
1879mm (1829mm) |
0.79L/s |
| 125mm Beaded Half Round |
125mm |
52mm |
1879mm (1829mm) |
1.09L/s |
| 150mm Beaded Half Round |
150mm |
76mm |
1879mm (1829mm) |
1.83L/s |
Ogee
| Profile |
Internal Width |
Overall Depth |
Length |
Flow Rate |
| 100mm Ogee |
100mm |
54mm |
1875mm (1829mm) |
0.41L/s |
| 115mm Ogee |
115mm |
60mm |
1875mm (1829mm) |
0.60L/s |
| 125mm Ogee |
125mm |
66mm |
1875mm (1829mm) |
0.74L/s |
| 115mm Ogee Notts |
115mm |
75mm |
1875mm (1829mm) |
1.23L/s |
| 100mm Ogee G46 |
100mm |
75mm |
1869mm (1829mm) |
0.76L/s |
| 125mm Ogee G46 |
125mm |
100mm |
1885mm (1829mm) |
1.56L/s |
Deep Half Round
| Profile |
Internal Width |
Overall Depth |
Length |
Flow Rate |
| 100mm Deep Half Round |
110mm |
70mm |
1882mm (1829mm) |
1.52L/s |
| 125mm Deep Half Round |
122mm |
70mm |
1890mm (1829mm) |
1.99L/s |
Box
| Profile |
Internal Width |
Overall Depth |
Length |
Flow Rate |
| 100mm Box |
105mm |
72mm |
1870mm |
1.63L/s |
