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Think my roofing area calculation sound reasonable?

Think my roofing area calculation sound reasonable?

#1
07-18-10, 05:03 PM
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Join Date: Feb 2009
Location: Calumet Township, Indiana
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Think my roofing area calculation sound reasonable?

'Cause I don't.
In figuring actual surface area of the gable roof of my 1,150 sq ft house and 2 /2 car garage I came up with 2,730 sq ft.

This includes pitch, eaves and 15% waste for each of two cross gables according their individual area after their pitch was figured.

Material is 845 sq.ft. for the garage which leaves 1,885; an increase of 735 sq.ft. over 1,150 sqft living area just because of eaves, pitch, and valleys?

So I'm not looking for specifics unless anyone notes a blunder in what I've said already, but does this sound within the ball park? -Thanks for reading all!

#2
07-24-10, 07:15 PM
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Well since furd is talking about roofs then I'm gonna try one more time to get in on the action: BUMP!

Never mind the details I was just looking for the ball park.

#3
07-24-10, 08:38 PM
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The 2700 sf sounds reasonably close.

I did a lot of loss verification after hurricane Katrina. This was not a low-ball, minimal insurance estimate, but a real-life estimate of what a consumer would do for his own home. - Not 1/4 or 1/2 of a roof, but recognizing that the only sensible way to measure the real cost since replacing a portion is usually not he real story.

We used a "ball-park" figure of 1.4 times the structure foot print area if it was reasonably normal (average pitches and average overhangs). We also used some other factors for the more unique roofs. - This was for estimating and not for bidding, buying or ordering (where waste and conditions are big factors).

Dick

#4
07-25-10, 01:06 PM
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Join Date: Feb 2006
Location: USA
Posts: 6,394
Roof Area

Give us the roof pitch and amount of overhang. Then we can get closer to actual.

#5
07-25-10, 07:17 PM
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Location: Calumet Township, Indiana
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This is the house itself:
1,150 sq ft living space
18" of overhang all around
6/12 pitch
48 linear ft of valley

The garage seems more straightforward:
It's 575 square feet with a 12" overhang.
Same pitch.

Thank you for any help, even if it's to say, ya just go with 27 square and quit being a sissy!

#6
07-27-10, 06:29 AM
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Join Date: Feb 2006
Location: USA
Posts: 6,394
Roof

I get 23 squares for house and garage. Add waste allowance to get total amount to order.

#7
07-27-10, 05:37 PM
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Location: Calumet Township, Indiana
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Thank you. I feel better with the second opinions. Material estimations are not my strong point and in the past have also turned up too generous.