Atlas Closed Valleys: Keep Joints and Nails Out of the Water Path
Bulletin date: not stated in source
Atlas’s closed-valley instructions address which roof plane starts first, shingle extensions across the valley, trimmed corners and adhesive. They also keep joints and fasteners away from the central drainage area
Atlas technical bulletin: Valley - How to Install a Closed Valley.
What this means for your roof
Atlas’s closed-valley instructions address which roof plane starts first, shingle extensions across the valley, trimmed corners and adhesive. They also keep joints and fasteners away from the central drainage area. Those details should be visible in the installation plan and progress photos.
A useful question for your contractor
Will the valley photos show the required crossing, trimming and fastener placement?
Ask for the answer to be tied to the actual roof condition and the exact product being installed. Keep the agreed repair or installation detail with your estimate and project photos.
Bulletin dated: not stated in source. The date shown identifies the manufacturer document used for this summary.
Read Atlas: Valley - How to Install a Closed Valley
This homeowner summary explains the cited bulletin. The complete manufacturer document and current product instructions govern the installation details. A requirement for one manufacturer or product should not be transferred to another without checking.
Discuss your roof with Barnes N’ Roofs
Cover image: Atlas, from the linked manufacturer bulletin. Read the complete source for the full detail and its limitations.