from the peak down to the beginning of the gutter --and then from side to side and then multiply this number x 2 since there are two sides on the roof-- then devide the total you get by 100 and you will find out how many square.
will need more info than just house sq footage.... what is the roof pitch, how big are the overhangs, how many valleys
40 sq ft
Length times width
270 sq ft
1742400 sq ft
3 bundles of shingles per 100 sq ft of roof
To find the sq. ft of a roof you have to measure the length and the width and multiply those figures together. Then you divide that figure by 100 and it will tell you how many squares of shingles it will take to cover it.
Under air means the sq. footage under air conditioning through out the house, under roof means everything covered including for example the garage which isnt air conditioned but is a covered sq. foot area.
375 sq ft
910 sq. feet
The site below that explains the pitch - how to measure it with a calculator to use with pitch and calculate the total footage of your roof
A replacement roof would typically run around $10,000. This is a very rough estimate because you would have to know the sq footage of your roof as well as the pitch.
9 sq ft = 1 sq yd. Divide the square footage by 9 to find sq yds.
You measure the roof to get the square feet. There are 100 square feet in a square. On a straight single peak roof it's height times length on one side and double it. Then divide the total square feet by 100. This final number will give you the number of squares you have. If the roof is a flat, commercial roof, it is the same (100 sq. ft = 1 SQ). However, if it is a metal panel commercial roof, you need to add in "stretch factor" or the added amount of square footage if the panels were to be stretched flat. A good estimate for this is: If the ribs on the metal panel are 1" tall, add 10% to your square footage; if the ribs are 1.5" tall, add 15% to your total square footage. So, if you have a metal roof that is an R-panel (_/-\_), the ribs are 1.5" tall and the roof is 100 SQ (or 10,000 sq ft), take 10,000 sq ft + 15% (1500) = 11,500 sq ft (115 Squares).
will need more info than just house sq footage.... what is the roof pitch, how big are the overhangs, how many valleys
NO they differ by one dimension.
Unless you have a flat roof, no; the surface area of the roof will be larger than the ground area of the building.