Roof Open W Valley Installation Instructions

A valley s main function is to create runoff pathways to direct water flow from the roof planes into a valley trough.

Roof open w valley installation instructions.

When i ve finished shingling the first roof plane i snap a chalkline 2 in to 3 in. Then i install a line of shingles up the valley with the top edge aligned with my snapped line. Install the roofing screws vertically along each rib in the panel. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.

Install an underlayment centered in the roof valley. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. But the stakes are higher for valleys than they are for gutters in a previous video we covered how to flash. W type valley flashing is more rigid for handling so it stays straight and it stops waler rushing down one side of a roof from rushing back up the other side.

Intake low exhaust high 25 roofing failures 28 30 how to estimate roofs 31 35 installation instructions. Lutely necessary to follow a manufacturer s installation. Shingle the other side of the valley the same way. Stop nailing 6 inches from the center.

Ensure ice and water protector has been installed along the valley first. The volume of water varies with the valley s length and slope. Shingles 36 89 berkshire 36 39. Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line.

Recommended procedures of basic valley flashing installation. Roof valleys are like gutters with a steep pitch. Then install a non corrosive metal valley flashing of 24 minimum width. Then starting at the base of the.

Away from the valley center just as i did with the closed cut valley. To secure the roof valley flashing nail it down carefully. Open valleys open valleys are constructed by installing a metal lining. Roof one side of the valley running the shingles across it.

Plane of the main roof. Only nail at the edges with only enough nails to. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Valley constructions 14 open valleys 15 shingle application 16 flashing details 19 24 flashing against vertical sidewalls 19 flashing around chimneys 20 roofing ventilation 25 27 proper ventilation.

The lowest of these valley shingles is cut back at an angle in line with the lowest course line.