Roof Valley Installation

Recommended procedures of basic valley flashing installation.

Roof valley installation.

The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. Ensure ice and water protector has been installed along the valley first. The lowest of these valley shingles is cut back at an angle in line with the lowest course line. To secure the roof valley flashing nail it down carefully.

You can see that the edge of the valley has been cut so that it s in line with the edge of the eave trim. Away from the valley center just as i did with the closed cut valley. Between the metal and the valley we re going to use tape seal to make sure that water can t lip itself underneath and roll back up underneath the valley. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.

With a clean valley you can lay down some peel and stick roofing membrane. Then i install a line of shingles up the valley with the top edge aligned with my snapped line. Some roofers cut the shingles parallel to the flashing s center ridge. Others start with a 3 inch wide.

Then starting at the base of the. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.

Only nail at the edges with only enough nails to. Fold the top over the roof ridge and cut the bottom along the drip edge metal. 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. Most metal shingles will be attached to the roof using metal shingle.

Install an underlayment centered in the roof valley. Snipping off the corners of. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Apply an approximately 3 inch.

When i ve finished shingling the first roof plane i snap a chalkline 2 in to 3 in.