Figuring Shingles on a Roof

How do i figure how many shingles i will need on a roof that is approximatelly 10,403.80? i know it is 33 1/2 squares..but how do i figure it this large amount. multiply or divide? help please..thanks..

 

Pearlyred...always better to start your own thread, but...
What is the 10403.80 number? Square feet of the roof? Cost of the roofing job? What?


Anyway, 3 bundles per square. Each bundle of shingles covers 1/3 square. 1 square = 100 square feet

33 1/2 squares x 3 bundles per square=100 1/2 bundles...not including waste.

 

Pearlyred, If using dimensional shingle there are 4 bundles per square. If the 10,403.80 number is square feet you will need 34 square not including waste.

 

Bill62
Thanks for clarifying and reminding me dimensionals are different..
but no way 10,403 SF is 34 sq of shingles, more like 104 square isn't it?

10403 sf /100 = 104?


Thats why the 1st part didn't add up to me.

 

If you have over 10,000 SF of roof you have a huge house. 34 square sounds more like a reasonable sized house roof.

 

Gunguy45 - Thanks for straightening that out, do not know what I was thinking.

 

So, Pearlyred, what does the number 10403.80 describe? Is it square feet area of the roof?

 

I figure it has to be what someone is trying to charge them....

Waaay too much I would think.

 

the total 10,403.80 would be 104 square-don`t be surprized that roofing costs more fellas-the prices have doubled than 1/2 again for most roofing material
30 year dimensionals are 3 bundles to square,lifetime dimensionals are 4 bundles to a sq
when measuring a roof,measure all roof planes by width ,and height-add all totals together,then add approx. 10 % for waste material
for a removal and reinstall with dimensional shingles,proper underlayments,and venting 10,400$ would not be out of line for a 34 sq. roof---prices should range from 9-12,000$ for a proper job with all necessities-more if it`s a steep pitched roof