Install synthetic roofing.
How do you do a valley with metal roofing.
First clean the debris out of the valley including sawdust nails and whatever else is in there.
The three methods to shingle a roof valley.
Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
Woven valley shingle installation.
Closed cut shingle valley installation.
Apply two beads of roofing cement to attach the top layer shingles to the bottom layer shingles.
Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant.
Cut corners and apply cement dub cut the top layer shingles see step 4 in open metal valley above.
Also apply cement to attach the top layer shingles to each other see steps 5 and 6 in open metal valley above.