Pry and lift off the flashing.
How to replace roof valley flashing.
Step 9 cut corners and apply cement.
Slip a piece of sheet metal flashing under the top layer of shingles to protect the bottom layer in the valley while you cut the shingles with a hook blade.
With a clean valley you can lay down some peel and stick roofing membrane.
Cut each side at the upper end of the valley to conform with the.
Cut the top layer of shingles along the chalkline.
Learn the three methods of shingling a roof valley the advantages and disadvantages of each how to choose valley flashing and how to shingle an open valley.
Install an underlayment centered in the roof valley.
I have my valley custom made with water trough to help with leaking b.
If this is a repair job the siding must also be removed and replaced with the flashing.
From drip edge to valley flashing december 25 2018 drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies.
The top joinery of both valleys when they meet on the same plane of roof is shown here.
Pull or cut off any nails.
Then install a non corrosive metal valley flashing of 24 minimum width lap successive sheets of metal flashing a minimum of 12 inches and seal laps.
Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.
Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
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.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
To replace flashing around the vent pipe first remove the shingles covering the flange at the back and sides.
First step flashing must be installed before the siding so that the siding can cover the top of the flashing.
Architectural shingle installation is especially critical in roof valleys where iko recommends an open valley installation.
