The three methods to shingle a roof valley.
Sa sheet for the valley of a roof.
One layer each of felt underlayment mineral surfaced roll roofing and two layers of shingles.
And either an organic or modified underlayment depending on whether tiles or shingles are being installed.
Roof one side of the valley running the shingles across it.
Closed cut shingle valleys work fine with strip shingles and laminated asphalt shingles.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
3 drill point no 12 14 x 38mm long into steel or type 17 drill point no 12 11 x65mm long into timber.
This recommendation includes iko s premium shingles.
Valley flashings are custom fabricated to any measurements and angles and usually measure 10 in length but can also be bent in 12 lengths.
For example in metal roofing systems valleys are commonly fabricated with hems but can also be fabricated without them in which case they could still be used for metal roofing or any other type of roofing.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.
Iko recommends that you install architectural shingles with the open valley method for the best roof performance.
Some homeowners prefer the consistent look that a woven valley provides.
If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof.
A closed cut roof valley will have at least four layers of roof materials.
To shingle out of the valley with laminated shingles lay a shingle down as a gauge and mark the corner at the bottom left and top right of the roof.
Open valleys a roof using the open valley style involves placing a v or w shaped piece of metal usually galvanized or sometimes copper in the seam of the valley and then covered with a base sheet such as 30lb.
Class 3 hex flange head epdm seal self drilling no.
I then move the shingle to the uppermost course on the roof plane line up the mark on the shingle with the valley center and again mark the corner.
Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.
Woven valley shingle installation.
With a clean valley you can lay down some peel and stick roofing membrane.
Stop nailing 6 inches from the center.
A type of closed valley is a cut valley where the shingles from the adjacent slope are cut parallel and just short of the center of the valley.
Shingle the other side of the valley the same way.
