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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.

 

 

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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.