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Changing Angles in Valleys

A change of roof pitch in a valley run will usually result in a change of angle in plan view. The change is acceptable, but the freeboard of the lower valley must be at least 20 mm to allow for turbulence.

 

Changing Valley Angle

 

 

Clause: 
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Clause Number: 
5.5.5
/cop/roof-drainage/valleys#changing-angles-valleys
Revision Category: 
2 - Editing and rearrangement
Revision Detail: 

Added an illustration showing the details for changing angles or pitch in valleys.