Installing A Metal Roof Valley

How to seal metal roof valley.

Installing a metal roof valley.

To secure the roof valley flashing nail it down carefully. Attach the flashing panel in place at the bottom. Take your first sheet of metal and place it on the roof so that it overhangs the edge at least 3 4 in 1 9 cm. Always begin working at the point with the longest peak to eave distance.

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. Take care the first piece is aligned precisely perpendicular square to the edge. Apply an approximately 3 inch. Step 9 cut corners and apply cement.

First clean the debris out of the valley including sawdust nails and whatever else is in there. Add the metal panels. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof. Use 1 inch galvanized roofing nails.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Lay the flashing down in the roof valley and start at the lower end of the roof. Install synthetic roofing. Install an underlayment centered in the roof valley.

Then starting at the base of the. Ensure ice and water protector has been installed along the valley first. Cut the panels from the ground instead of on the roof to avoid damaging the roof with the debris. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.

Best practices for sealing the metal roof valley vary based on the slope of the roof. Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel. Cut the top layer of shingles along the chalkline. With a clean valley you can lay down some peel and stick roofing membrane.

Only nail at the edges with only enough nails to. 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.