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coachcr

06:25PM | 06/24/04
Member Since: 06/23/04
9 lifetime posts
Bvroofing
I have read about the 6 inch offset method of installing shingles. My question concerns how to handle the situation when there is only a small amount for the last shingle in a row. In another words, the width of my roof leaves me with a a 1/2 inch wide shingle for the last shingle in a row. Is there something I should do to prevent this from happening? I don't think a 1/2 inch wide shingle will be very effective.

Thanks, in advance, for your help.

coachcr

01:02AM | 06/27/04
Member Since: 06/23/04
9 lifetime posts
I have read about the 6 inch offset method of installing shingles. My question concerns how to handle the situation when there is only a small amount for the last shingle in a row. In another words, the width of my roof leaves me with a a 1/2 inch wide shingle for the last shingle in a row. Is there something I should do to prevent this from happening? I don't think a 1/2 inch wide shingle will be very effective.

Thanks, in advance, for your help.

tomh

07:46AM | 06/27/04
Member Since: 07/01/03
550 lifetime posts
I think you are talking about the reveal for the shingle tabs from one row to the next. This can range from 5-1/4 inches to 6-inches depending on the shingle. The 1/2 inch reveal would occur at the row just below the ridge line. This would be unnoticible, and it is effective as the shingle is cut off at the ridge line and is covered by the hip/ridge shingle, or with a ridge vent system. What you don't want to do is omit that row and leave a 6-1/2 inch reveal where the maximum reveal for the shingle is specified as 6-inches.

The amount of reveal can be adjusted by shortening the reveal to 5-3/4" or 5-1/2" all the way up the roof. This is acceptable practice and may be an alternative for you.

Perhaps this is not what you were meaning? Post back and clarify, and we can probably provide more details. The length of the affected run and proposed shingle type (3-tab or dimensional) may help us give a better reply.

coachcr

06:28PM | 06/27/04
Member Since: 06/23/04
9 lifetime posts
My roof is 37'-6 1/2" wide. As I understand it, I should start the first row with a full shingle, the second row with a shingle 6" shorter, the third with a shingle 12" shorter and the fourth with a shingle 18" shorter. On the fourth row, I would end up with a 1/2" wide shingle. This is based on a standard 3 tab shingle. Actually, I probably should have a 1/2" overhang on each side of the roof, so I would actually end up with a 1 1/2" shingle to complete the fourth row. Anyhow, it appears I would have a very narrow portion of a shingle on one edge of the roof that I'm concerned would be a problem. I'm sure this is a common problem, but my lack of experience has left me stranded.

Thanks so much for your help.

tomh

06:27AM | 06/28/04
Member Since: 07/01/03
550 lifetime posts
Now I understand! You are being a little too precise. Given the length of each run, there are at least 12 full shingles being laid on each row. For the row with a 1/2 inch remainder, as you approach the end of the row, just don't butt the shingles against one another so tightly, Leaving a 1/8 inch gap between the shingle edges, you can make up the 1/2 inch in the last 4-shingles, ending with a whole one. Not a problem because the pattern is still offset, and the openings between shingles is not over a seam that could leak. A 1/16 gap (dime) over the last 8 shingles would do the same thing.

coachcr

04:35PM | 06/28/04
Member Since: 06/23/04
9 lifetime posts
I get what you're saying. Actually in my case, I'll have to adjust for 1.5" (1/2" + 1/2" on each end for overhang). Should I try to leave a 1/8" gap between twelve shingles to compensated for the 1.5" gap?

I considered making the last two shingles in this row partials. In another words, cut 6" off the last full shingle, so that the final partial shingle would be 7.5" (1.5" + 6"). Is this an acceptable method also?

What is the smallest width partial shingle one should use -- 6"?
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