If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof.
How to fix a roof valley.
And you can tar it but it s a real stop gap band aid like measure.
This video shows the full repair from removing leaded va.
A chalk line can be used to guide you as you cut the shingles.
This method of lead valley repair is proven to not only be fast and safe wit.
This is where two parts of the roof join.
Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary.
As you install roof shingles on the second roof plane you allow them to lap over the valley on top of the first shingles.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
Step 2 remove the shingles.
Cut each side at the upper end of the valley to conform with the.
I have my valley custom made with water trough to help with leaking b.
Check the entire roof valley carefully to locate the source of these problems.
If you have a roof leak it may well be through the valley.
Follow these three preparatory steps to get ready to fix the valley leak.
Move to the highest end of the valley and work your way down cleaning shingles from both sides of the valley whether they re damaged or not.
Clear any debris in the roof valley and surrounding area.
The right thing to do here is to pull a valley basically pull a valley apart and rebuild it.
The top joinery of both valleys when they meet on the same plane of roof is shown here.
This video shows the traditional and best way to repair a lead valley on a roof.
Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters.