Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.
How to install metal flashing in valleys on ondura roof.
Installing ondura corrugated roofing sheets on a chicken coop duration.
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.
Roof flashing with mark sauder.
Step 9 cut corners and apply cement dub cut the top layer shingles see step 4 in open metal valley above.
Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.
5 common mistakes to avoid when installing metal roofing duration.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
I have my valley custom made with water trough to help with leaking b.
Install an underlayment centered in the roof valley.
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.
With a clean valley you can lay down some peel and stick roofing membrane.
Lay the flashing in a way that.
The top joinery of both valleys when they meet on the same plane of roof is shown here.