Roof installation how to shingle a valley hd by roofrepair101 more about roofing at.
Valley of roof.
The valleys on many older houses comprise layers of roofing paper which can deteriorate over time.
The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off.
Roof one side of the valley running the shingles across it.
When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof.
If the nails are placed in the very center of the valley leakage will occur.
The three methods to shingle a roof valley.
These leaks can be caused by poor roofing practices or just simply by the age of the shingles on the roof.
This recommendation includes iko s premium shingles.
Iko recommends that you install architectural shingles with the open valley method for the best roof performance.
A roofer must be careful where the nails are placed in the shingles of valley roofs.
Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.
Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.
Shingle the other side of the valley the same way.
Stop nailing 6 inches from the center.