Please re-write so this is understandable.
30 bundles covers 1000sq, you have 960, but you need 4 more for all your end cuts and about 3 for ridge cap,if your using Architectural shingles you will need to buy ridge cap shingles, say 3 bundles. You will also want min 2 bundles extra to save in case of damage down the road. You should get 38 bundles keep 2 and return what you don't use.
When talking about the area of a roof, remember that it is not the same as the square footage of the structure. For example a 20 x 30' building with a 12" overhang and a 4/12 pitch will have 736 sq ft of roof vs only 600 sq ft of slab. One square of shingles covers 100 square feet. 15 year shingles come 3 bundles to a square. 25 year come 4 bundles to a square.
When talking about the area of a roof, remember that it is not the same as the square footage of the structure. For example a 20 x 30' building with a 12" overhang and a 4/12 pitch will have 736 sq ft of roof vs only 600 sq ft of slab. One square of shingles covers 100 square feet. 15 year shingles come 3 bundles to a square. 25 year come 4 bundles to a square.
A 30x50 roof has 1,500 square feet which is 15 squares. 3 bundles of shingles equals 1 square so you will need about 45 bundles.
about 3 squares or 9 bundes plus one for cuts
There are 21 shingles to a bundle and 3 bundles covers a 10 by 10 ft area. a basic rule is a bundle covers a sheet of plywood, then add some for valleys.
Shingles are rated in pounds / 100 square feet. Typical ratings are 235# or 265#. 1 bundle of shingles covers 1/3 of 100 sq feet. 235# shingle / 3 = 78.33 lbs
measure the square footage first. one square of shingles (3 bundles) covers 100 sqft. divide the square footage by 100 and that's how many squares of shingles you need (be sure to buy enough extra to cap the roof with and compensate for waste at the ends. (starter and ender shingles)
A square usually refers to shingles or siding and it's the amount that covers 100 square feet (or a 10' x 10' area).3 bundles of shingles cover a square1 bundle of shingles covers a 4' x 8' sheet of plywoodSiding has a certain number of "square" per box
3/4 inch plywood takes 48 sheets to make a unit.
How many bundles of 3-Tab Shingles are needed to cover 80 square feet?
3
You will need to get 10 square of shingles, 3 bundles usually equal one square but it depends on if you get 30 year 40 year 50 years shingles ect. talk to your seller, but you will need ten square
Depends on type of roof. On average will require 4 bundles of Shingles.
Total area needed to cover: A = 10x12=120 area units Area of one piece of plywood: A = 4x8 = 32 area units You will have to divide the total area that needs to be covered with the area of on plywood board, to get how many plywood boards you can fit in the same area. 120/32 = 3,75 Answer: You will have to use 4 pieces of plywood, or more precisely 3 whole and 3 fourths of a plywood board.
3 bundles covers 100 square feet. You have 18,4 100 square feet. 18.4 x 3 = 55.2 so you will need 56 bundles.
One bundle of shingle covers about 33 square feet of roof hence around 850 bundles of shingles will be needed for 28000 square feet roof!