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How many shingles do I need for my shed roof?

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  • May 23rd, 2020 9:59 pm
[OP]
Deal Addict
Nov 9, 2011
1001 posts
1066 upvotes
Toronto

How many shingles do I need for my shed roof?

I have an 80 sq ft shed, accounting for 20% waste - I would need about 100 sq ft of shingles.

But I am confused by Lowes' product description - it says that this bundle has 33.3 sq ft coverage - do they account for half of the shingles that are being overlapped during install?
https://www.lowes.ca/product/roofing-sh ... les-394098

Do I need 3 of those bundles or 6 bundles for my 80 sq ft shed?

I am completely new to this obviously - I just watched some YouTube videos and I think these are all I needed in terms of materials..

Drip edge
https://www.lowes.ca/product/drip-edges ... dge-274960

Underlayment
https://www.lowes.ca/product/roofing-un ... ent-888445

600 pack 1" roofing nail
https://www.lowes.ca/product/roofing-na ... ils-576246

Do I need anything else?

Thanks
17 replies
Deal Fanatic
Aug 29, 2011
6076 posts
3148 upvotes
Mississauga
Does a shed roof really need underlayment and drip edge?
Deal Addict
Apr 18, 2005
2391 posts
834 upvotes
Mississauga
It's Lowe's and HD... just buy a little extra and after done .. return unopened packs.
Last I checked for a 10x10 gable shed it was 5-6 bundles.

And regarding underlayment...... I would put it on.... it will be a few extra $$ probably 1 or 2 rolls .. but will extend the life of shingles.. drip edge is debatable... but again are we going to quibble over $30 ?
[OP]
Deal Addict
Nov 9, 2011
1001 posts
1066 upvotes
Toronto
Thanks @TLSRULZ

But it appears that I only need 3 bundles of shingles and 1 roll of 15lb felt as per this Roofing Material Calculator: https://www.inchcalculator.com/roofing-calculator/

The drip edge is probably not necessary as the current shed does not have any - but for $30ish dollar.. I might as well do it "right" where I can.
Deal Expert
Aug 2, 2001
16643 posts
6897 upvotes
Are you doing a starter strip and have you accounted for that?
Deal Fanatic
User avatar
Jan 6, 2002
5873 posts
6076 upvotes
Toronto
Four thousand one hundred and sixty-eight.
A glass of wine with you, sir, and the ladies I'll enjoy.
Revolutionary times must on occasion make do with considerable abridgements in order to accentuate the political line more strongly.
[OP]
Deal Addict
Nov 9, 2011
1001 posts
1066 upvotes
Toronto
TrevorK wrote: Are you doing a starter strip and have you accounted for that?
Yes I am and I figured that should be accounted for with the 25% extra - only needed 80 sq ft.
[OP]
Deal Addict
Nov 9, 2011
1001 posts
1066 upvotes
Toronto
hoob wrote: Four thousand one hundred and sixty-eight.
huh?
Sr. Member
Oct 22, 2016
631 posts
537 upvotes
Comox Valley
tonershop wrote: huh?
He is playing a joke on you. I did laugh myself.

You need 3 bundles for sure. I suggest buy 4 to have it on hand, if needed.

Use underlayment, well worth it. May be cheaper at roofing supply store.

Your nails are 1”, I suggest 1 1/4” for further fastener into the deck, and easier to nail.

Your choice about drip edge.
[OP]
Deal Addict
Nov 9, 2011
1001 posts
1066 upvotes
Toronto
User452441 wrote: He is playing a joke on you. I did laugh myself.

You need 3 bundles for sure. I suggest buy 4 to have it on hand, if needed.

Use underlayment, well worth it. May be cheaper at roofing supply store.

Your nails are 1”, I suggest 1 1/4” for further fastener into the deck, and easier to nail.

Your choice about drip edge.
Thanks!
Sr. Member
Oct 22, 2016
631 posts
537 upvotes
Comox Valley
tonershop wrote: Thanks!
Be aware that starter shingles, are a different type of shingle than what you have posted. Usually flat as photo enclosed.

As for your drip edge, there are different types, good site here
https://www.iko.com/na/pro/building-pro ... gle-roofs/

For shed roof at the gable ends, I would just use the type C (L shaped). At the eves if you do want one, you want a drip edge that is more like type d, as it is not a 90 degree at this place, due to roof slope.
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Deal Fanatic
Jan 25, 2007
9639 posts
5036 upvotes
Paris
3 bungles, proper drip edge, and I used lower end underlay as it is just a shed, but I still put it on all the way up.

What about a peak vent and capping the peak?

Edit: also 1” nails are a bitch to hold. I suggest 1-1/4” or 1-1/2”.
[OP]
Deal Addict
Nov 9, 2011
1001 posts
1066 upvotes
Toronto
Thanks @User452441 & @Jerico for your advices - I definately need more research. I figured it is a good DIY project since I don't really care much about this shed.
Deal Fanatic
Jan 25, 2007
9639 posts
5036 upvotes
Paris
tonershop wrote: Thanks @User452441 & @Jerico for your advices - I definately need more research. I figured it is a good DIY project since I don't really care much about this shed.
When in doubt, search YouTube for “Ask This Old House” videos on whatever topic. I find their stuff to be pretty great.
Sr. Member
Oct 22, 2016
631 posts
537 upvotes
Comox Valley
tonershop wrote: Thanks @User452441 & @Jerico for your advices - I definately need more research. I figured it is a good DIY project since I don't really care much about this shed.
You are on the right track. Post Photos of your shed, and Dimensions of it, we will narrow it down for u.
Cheers
Deal Addict
Apr 10, 2009
2008 posts
1370 upvotes
Hamilton
General rule is 1 bundle for 1 4x8 sheet of plywood. buy 1 extra. Better to be looking at it than looking for it.
Especially with lines to get into HD/Lowe's.
[OP]
Deal Addict
Nov 9, 2011
1001 posts
1066 upvotes
Toronto
Drthorne wrote: Ridge cap, or you can cut from matching 3 tab shingles

https://www.homedepot.ca/product/gaf-se ... 1000731226

Get a knife and these hook blades for cutting, makes it go quicker

https://www.homedepot.ca/product/olfa-1 ... 1000183785
Thanks, I will cut the ridge cap from the 3 tab shingles. I saw a YouTube video on that.

I already have that hook blade.

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