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How To Shingle A Valley With 3 Tab Shingles

On a woven valley, each course of shingles is extended beyond the valley crease and at least 12 in. Laminated shingles let you start in the valley and work outward, which can be an advantage in some situations.


Although, asphalt shingles, either 3tab or architectural

Both methods require about the same number of shingles.

How to shingle a valley with 3 tab shingles. Roof one side of the valley, running the shingles across it. Press shingle firmly into the adhesive. Cut the tabs off of one shingle and lay it on the bottom edge with a 1/4 inch overhang.

These shingles have a 50 percent more wind rating as well as impact rating of class 4 which means that it is more durable to mother nature than three tab. Because shingles are easy to cut, it is better to err on the side of too much as opposed to too little overhang. When shingling a roof with three tab shingles, it’s easiest to shingle the roof planes first, working toward the valley.

Other composition shingles, such as architectural and random cutouts, are installed using most of the same techniques. For closed valleys (valley covered with shingles): Shingle the other side of the valley the same way.

Of extra shingle material for each pair of woven courses. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. One ply of smooth roll roofing complying with astm d 6380 and at least 36 inches wide or valley lining as described in items 1 and 2.

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Once the underlayment is complete, it is time for the shingles. Onto the adjacent roof plane. Do not drive nails within 6 inches of the center.

Stop nailing 6 inches from the center. Before you go out and purchase your 3 tab shingles, you will first need to figure out how many of them you will need. Press the shingle into the valley and make sure that it is flat against the surface of the roof.

Install full shingles flush against the six applied courses Cut 12 off the first shingle of the third course, 18 off the first shingle of the fourth course, 24 off the first shingle on the fifth course, and 30 off the first shingle of the sixth course. Check with your roofing dealer to learn about any installation differences.

Do this on both sides of the roof. The shingles also appear to be the incorrect size. When the shingles from one side of the valley are laid across the valley while shingles from the opposite side are trimmed back approximately two inches from the center of the valley.

Plan for extra valley material. Currently, the us national average for benchmark architectural shingles is around $74.51 per square or $25 per bundle. Three tab have no impact rating.

It is a good idea to add 10% to this number in case you. One square (package) is equal to 100 square feet of roof. In fact, they all have insisted on it.

Fasten the shingles about 6 inches away from the centerline on both sides. Valleys are either woven or cut; Coat each overlay with plastic cement.

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Irregular offset patterns of the shingles are indicated. Starting at the bottom edge of the valley, begin laying down the shingles. If need be, i can go back later and trim the overhanging shingles.

You will simply need to add up the total square footage of your roof and divide it by 100. However, it is also an indication that incorrect shingles were installed. To lay out the design for the shingles, begin at the bottom of the roof and place a tape measure ½ inch from the edge of the roof to ensure the shingles overhang the drip edge.

Mark 12 inches up on the roof for the first course of shingles, then mark every 5 inches all the way up the roof to set your reveal. Start by laying all shingles on one side of the roofing and stretch it across the valley. Stretch it about 12 inches across the centerline.

The lower edge of a tab on a shingle.


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How To Shingle A Valley With 3 Tab Shingles

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