Measure the width of the sheet metal valley flashing.
Patching a roof valley.
Clear any debris in the roof valley and surrounding area.
Start at the upper row of shingles at the upper end of the.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
A lead valley is a particularly difficult item to dispose of as lead is toxic and so a repair may involve simply patching up your lead roofing.
Move to the highest end of the valley and work your way down cleaning.
Position an extension ladder against the lower edge of the roof near the valley that is repaired.
Typical valley flashing is 14 inches wide.
Follow these three preparatory steps to get ready to fix the valley leak.