GUTTER FLOW CAPACITY

Gutter flow capacity is dependent upon system type, outlet position and whether gutter is laid level or to a specified fall. The table above gives the required information based upon a Rainfall intensity of 75mm per hour and recommendations from BS EN 12056-3:2000.

• Single Roof
• Hipped Roof
• Valley Roof
• Double Valley

Single Roof.

Length of roof (L):

Width (Plan View):

Pitch of roof °:

Number of Outlets:

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Please enter details of the roof. All measurements should be in metres.

Length of roof (L):

Width (Plan View):

Pitch of roof °:

Number of Outlets:

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Calculate

Double Valley

Roof 1

Length of roof (L1):

Width (W1):

Pitch of roof (°1):

Roof 2

Length of roof (L2):

Width (W2):

Pitch of roof (°2):

Roof 3

Length of roof (L3):

Width (W3):

Pitch of roof (°3):

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Number of Outlets:

Calculate

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Valley Roof

Roof 1

Length of roof (L1):

Width (W1):

Pitch of roof (°1):

Roof 2

Length of roof (L2):

Width (W2):

Pitch of roof (°2):

---

Number of Outlets:

Help Reset

Calculate