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Attention All Math Whizez (sp?)

fit1

New member
If someone is building a barn and they want to know what the cost of the roof is only, what would it be if the roof is 100x100...
and $1.50 per foot. Each panel is 3ft. ???????????????
I get stuck with sq. foot and foot...anybody?
 
if the roof is 100X100 - then that is 10000 sq ft. you just multiply

do you have the square foot measurements of the shingle panel? 3 foot is likely the width, but you would need to know other dimensions - otherwise you only know how many will fit across the roof
 
fit1 said:
If someone is building a barn and they want to know what the cost of the roof is only, what would it be if the roof is 100x100...
and $1.50 per foot. Each panel is 3ft. ???????????????
I get stuck with sq. foot and foot...anybody?

Math was not my best subject, but...

100 * 100 = 10000 sq FT

Panel = 3 (by 3?) = 9 sq FT

10000/9 = 1111.1 * $1.5 = $1666.67 to roof your barn.
 
fit1 said:
If someone is building a barn and they want to know what the cost of the roof is only, what would it be if the roof is 100x100...
and $1.50 per foot. Each panel is 3ft. ???????????????
I get stuck with sq. foot and foot...anybody?

Hmmm....

the roof is 100x100 or 10K ft
@ 1.50 per foot the cost (not sure if you mean cost of the material or cost of putting it on, including labor)

= 10,000 x 1.5 or 15,000 bucks.

From what you told us the size of the panel is irrelevant to the cost, sounds like they just charge by the sq foot.
 
If someone is building a barn and they want to know what the cost of the roof is only, what would it be if the roof is 100x100...
and $1.50 per foot. Each panel is 3ft. ???????????????
I get stuck with sq. foot and foot...anybody?

Roof is 100 x 100 = 10,000 square feet.

If it's $1.50 per foot, the cost would come out to $15,000... I've never heard of a roof costing $15,000.

I don't think XBiker's answer is right because his takes the panel size into account, even though your question says nothing about that. It just says "each panel is 3ft." If the cost per square foot is $1.5, then each panel would cost $13.50, x 1111.1 panels = around $15,000.

Unless you miscopied or misunderstood the problem, we're looking at some kind of penthouse barn.

-Warik
 
no offense - but this is not gonna work - you aren't relaying the info right here.
or the thing is worded poorly that you are looking at.

when dealing with area, you are dealing with two dimensions. which means you need to know both the dimensions...

so to say they charge $1.50 "per foot" - that is only one dimension.
if they say "per sq ft" then that will show both the dimensions.

OR

if they say they change $N per panel, then that works too.

otherwise, you don't have enough info here
 
Let me try this...the roof is 100 ft x 100 ft...
the panels are 3 ft wide x 30 ft long...
the cost is $1.50 per foot on each panel...
that's all i know...
 
Per foot... hehehe... if that is true, then the cost would be infinite. Right Happy?

Just like there are an infinite number of points in a line segment, there are an infinite number of feet in 10,000 square feet... all you have to do is move 1 attometer over and say "ok here's another foot, fork over the $1.50."

It *HAS* to be square feet unless, like Happy said, they charge per panel.

If you type out the question exactly as it appears, we might be able to offer more help i.e. give you the right answer.

-Warik
 
HappyScrappy said:

so to say they charge $1.50 "per foot" - that is only one dimension.
if they say "per sq ft" then that will show both the dimensions.


Or if she is having the roof put on by a company they may combine the cost of labor and materials into a flat rate they charge by the sq foot of the roof size.
 
The only one close to being right is XBiker. One square in roofing terms a 10'x10' area. So if you have a roof that is 100'x100' you have a 100 square roof.

Now you need to find out how many roofing panel's you'll need, if one panel is a 3'x3' panel that's 9 square feet, in roofing terms that's .3 squares.

It will take you 9 - 3'x3' panels
5 - 3'x1' pieces
and 1 - 1'x1' piece to properly roof in one square.

From that you can expand that to fit your 100'x100' roof. So you'll need:
approximately 1150 - 3'x3' pieces of the roof paneling and that will give you a lot of extra room to make some mistakes if you have some troubles.

So now that you have more information than you asked for...if it's $1.50 per square foot, that's going to be $15,000.00

If they meant square foot as in roofing squares then the price will be $150.00

Who gave you this amount? Does it cover materials and labor? You might want to contact a local roofing contractor and ask them to quote you a price. The estimate should be free, if it isn't look elsewhere. Doing this will give you an accurate assessment of what the cost will be.

Hope this helps.

~p~
 
Math was not my best subject, but...

100 * 100 = 10000 sq FT

Panel = 3 by 30 = 90 sq FT

10000/90 = 111.1 * $1.5 = $166.67 to roof your barn.

I do believe that is the correct answer.
 
Guys... I think this is a math homework question, in which case stuff like "roofing terms" for what is deemed a square or not, and stuff like "labor costs" are not relevant. All that matters is what is given in the problem, which, judging by the fact that we can't get a definite answer here, is insufficient information.

-Warik
 
100' X 100' = 10,000 square feet

3' X 30' panels = 90 square feet

$1.50 per foot X 30'(length of panel) = $45.00

10,000 / 90 square feet = 111.111 panels

111.111 panels X $45.00 = $5000.00 to roof your barn.

That's the way I see it.

$166.67 like Xbiker says is a little too cheap, IMO
 
Actually, I was asking for this guy that I work with. He is having his barn built and was trying to figure out how much they were charging him for the roof only. Now, he said the price was $1.50 per foot and not square foot, which I see what y'all are saying about insufficient info...I'll check with him again to make sure...
 
fit1 said:
Actually, I was asking for this guy that I work with. He is having his barn built and was trying to figure out how much they were charging him for the roof only. Now, he said the price was $1.50 per foot and not square foot, which I see what y'all are saying about insufficient info...I'll check with him again to make sure...

in that case uNOwho is right - when I worked at a lumber yard, the way we calculated it was by squares and I forget the dimensions of the square - but he says 10x10 - so likely that.
from there you knew how many shingles were in a package and how much they would cover...
 
fit1 said:
Actually, I was asking for this guy that I work with. He is having his barn built and was trying to figure out how much they were charging him for the roof only. Now, he said the price was $1.50 per foot and not square foot, which I see what y'all are saying about insufficient info...I'll check with him again to make sure...

Ahhh ok... then Mr. uNOwho probably has the most authority in answering this question, as I know nothing of how roofing/building terms work. I shall now bow out.=)

-Warik
 
alrighty...got some addt'l info if this will help:

the panels are 3 x 30...at $1.50 per foot....they only charge for the lengh, which is 30 ft...so that would be $45.00 per panel...

so, is HumorMe right?
 
Holy shit !

I'd damn sure hate to be the poor dumb bastard that gets stuck hoisting a 30 ft panel up on the roof....
 
3'x30' hmmm, let me see here....that would really suck for whoever has to hoist them for damn sure.

I would say to get about 43-45 panels, that will give him ample room to make a mistake or two. It takes about 3 2/3 of a panel to fill one square. So the 43-45 will allow for about 2-3 extra panels in case future use is needed as well.

At that, the price for 43 will be $1935.00 and 45 will be $2025.00

That doesn't include cost for nails and all that extra stuff either.

So $2100.00 is a safe bet for a cost.

~p~
 
Not many barns have a flat 100x100 roof, is this roof actually 50 x50 on each side working out to 100x100 or did everybody forget to add for the other side?
 
total area of the roof in square feet = 100 ft x 100 ft = 10,000 sq ft

total area of 1 3x30 ft panel = 3ft x 30ft = 90 sq ft

total panels required to cover roof = 10,000 sq ft/90 sq ft = 111.11 panels

cost of panel = 30 ft x 1.50$ = 45$ per panel

total cost of roof = 111.11 panels x 45$ per panel = 5,000$


Whats wrong with this?
 
buddy28 said:
total area of the roof in square feet = 100 ft x 100 ft = 10,000 sq ft

total area of 1 3x30 ft panel = 3ft x 30ft = 90 sq ft

total panels required to cover roof = 10,000 sq ft/90 sq ft = 111.11 panels

cost of panel = 30 ft x 1.50$ = 45$ per panel

total cost of roof = 111.11 panels x 45$ per panel = 5,000$


Whats wrong with this?

This is the right formula.
That's the same formula is used on the first page of this thread. Why can't people do simple math?
 
only thing wrong with that humor me is the panels are directional in most cases, so you may need a bit more than the exact square footage
 
buddy28 said:
oh shit. Sorry HumorMe, didnt see you posted first.


nuff props :)


No problem here....I really posted it about others. Most people don't read the entire thread so there are always alot of rehashing the same thing. No prob!


DRRman
You do have a point there but I was just looking at the math end of it. I have always learned...always buy extra material......from experience, I always fuck up about half of my materials before I get it right! LOL!
 
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