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Old 07-07-2012, 08:25 PM   #1
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Shingles needed for hip roof


I'm totally lost trying to figure out the amount of shingles I'll need to reshingle my shed roof.

I've figured out I'll need 44 linear feet of ridge shingles, and 60 feet of drip edging. But how the heck do I figure out the square footage of this roof?


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Old 07-07-2012, 08:37 PM   #2
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Shingles needed for hip roof


Just measure across the roof from the midpoint of two hips, and multiply that times the rafter lenght.

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Old 07-07-2012, 08:38 PM   #3
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Shingles needed for hip roof


Same on the ends. Middle rafter, longest, lenght by the midpoint measurement.
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Old 07-07-2012, 09:04 PM   #4
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Shingles needed for hip roof


area of a triangle = 1/2 base x height. In your case, break down the long sides into a rectangle and two triangles for each side. For the two short ends just multiply base x height without dividing in 1/2, since you have two ends. Height is one of the short two legs of the triangle. If you deduct the ridge length from the long side length, divide the answer by two, you get the length of one short leg of the triangle. You have the long leg already. Formula for finding the legs of a triangle is a squared + b squared = c squared. Where a and b are the short legs, c is the long leg or hypotenuse. If you convert your inches to feet, it's a little easier. I come up with a height for your triangles of 7 1/2'. If you break down the side, you have a rectangle of 4 1/2' x 7 1/2' and two triangles of 7 1/2' x 6 1/4'. 4.5 x 7.5 x 2 = 67sq.ft. 7.5 x 6.25 = 48.75 sq.ft x 2 = 97.50 sq.ft.
67 + 97.5 = 164.5sq.ft. That takes care of both sides. The two short ends would be 7.5' x 13' = 97.5sq.ft. That takes care of the two ends.
164.5 + 97.5 = 262 sq. ft. total. Get 3 square of shingles and you should be alright. Hope this makes sense.
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Old 07-07-2012, 10:06 PM   #5
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Shingles needed for hip roof


You have 60' of drip edge only if your butting each pc to the next and have zero waste. I'd get 70'.
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Old 07-08-2012, 05:35 AM   #6
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Shingles needed for hip roof


Thanks all for the info. I guess I should have paid more attention in geometry.

I'm shocked it'll cost ~$500 to reshingle a simple shed. A bundle of standard shingles are $32, 2 packs of ridge shingles are $50/each, plus tar paper, nails, and drip edge.

I think I may just go with rolled roofing. If I understand correctly, rip off the old roofing, put on the drip edge, staple down felt, then nail/ cement down the rolled roofing? Also, I have 7/8" roofing nails, are they sufficient?

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Old 07-08-2012, 10:15 AM   #7
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Shingles needed for hip roof


You need 1-1/4 nails, and your trying to be penny wise and dollar foolish.
If you want the shingles to last long term, and the sheds in good shape then add some ridge venting along that peak and use architural shingles not three tabs, and never ever waste your time and money on rolled roofing!
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Old 07-09-2012, 06:13 AM   #8
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Shingles needed for hip roof


I was able to find someone selling 17 bundles of architectural shingles for $350.

Can I use a row of architectural shingles as a starter row?

Can I use architectural shingles as hip caps?

I'd like to use as many of the singles as possible and avoid buying anything else.
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Old 07-09-2012, 06:42 AM   #9
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Shingles needed for hip roof


You won't be able to do the ridge ths way, but you could do the hips like a dome roof is done. 3" towards windy side, 3" to the lee side.http://www.rooferscoffeeshop.com/sho...8&file=764&s=0
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Old 07-09-2012, 10:00 AM   #10
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Shingles needed for hip roof


So if I understand correctly, for 3-tab, cut the overlap at the hip, and use it for the other side? Basically wrap the shingle over the hip and cut straight through in half matching the angle of the hip? (ie no waste)

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Old 07-09-2012, 12:31 PM   #11
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Shingles needed for hip roof


No. You put the leeward side on first and go over the hip 3". Cut neatly. There will be scrap! Put the other side of roofing on and go over the hip 3" and cut neatly. BTW, these specs were put out by GAF, and GP. I assume the others agree to them too since it's like doing a valley.

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