Roof Valley Installation Instructions

Speed is king in residential roof installation but it can come at the expense of quality.

Roof valley installation instructions. 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. When i ve finished shingling the first roof plane i snap a chalkline 2 in to 3 in. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Intake low exhaust high 25 roofing failures 28 30 how to estimate roofs 31 35 installation instructions.

A woven valley shingle installation has other drawbacks including that they are slow to install especially in cold weather and more difficult to repair than the other types. Then install a non corrosive metal valley flashing of 24 minimum width. 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. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.

For solid decking at least 15 32 inch structural plywood supported on rafters at a maximum of 24 on center is required. Installation of panels roof pitch. Recommended procedures of basic valley flashing installation. 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.

The lowest of these. Next i smear roof cement a couple of inches away from my snapped line. Roof installation how to shingle a valley hd by roofrepair101 more about roofing at. This video demonstrates the proper installation technique for installing roofing valleys.

In order to shingle this kind of roof valley a roofing professional has to install both roof faces at the same time which is quite slow. Then i install a line of shingles up the valley with the top edge aligned with my snapped line. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Away from the valley center just as i did with the closed cut valley.

Without taking steps to maintain quality the fastest roof is typically the one that will cost contractors the most stated guillaume bailly senior training manager canada for the gaf center for the advancement of roofing excellence care. The open woven and closed cut methods are demonstrated. Install an underlayment centered in the roof valley. Ridge eave hip valley and gable end trims.