The professionals get up on the roof and use a tape measure. One square = 100 square feet.
No dimensional shingles require 4 bundles per square
You just have to measure it. Height times width and double that for simple roofs. Lots of angles or dormers will have to be allowed for. 3 bundles in a square. 1 square covers 100 square feet. Height times width gives you the square footage and do the math. Assuming you are talking about asphalt shingles they can be up to 5 bundles per square if you are using dimensional shingles. the standard flat three tab shingles are 3 bundles per square. You can calculate roof area just based on the dimensions taken on the flat. There are different multipliers to use that depend on the pitch of your roof.
80 squares is a measure of area, it doesn't apply to length.
ASPHALT
A square of shingles covers 100 square feet. So, you need 1732/100=17.32 square of shingles. If you can only buy whole number squares of shingles, you will need 18 squares of shingles to cover 1732 square feet.
Asphalt shingles typically last between and 15 and 30 years. It varies depending on the quality of your asphalt shingles
form_title= Asphalt Shingles form_header= Put a new roof on your home with asphalt shingles. What color shingles do you need? *= _ [50] What size shingles do you need?*= _ [50] Are you replacing a whole roof?*= () Yes () No How old is the roof?*= _ [50]
26 shingles in a bundle of three tab asphalt shingles
or fiberglass ? Depends where you live, determines what shingles to use.
everything burns.
Depends on the shingle. Is it a 25 year or fifty year. Asphalt or fiberglass?
Yes.
All shingles fade after time
Perhaps, but not guaranteed. Tile is generally much heavier than asphalt or "composition" shingles. If you're concerned, have a roofing contractor to evaluate your roof.
An inexperienced handyman.
Most asphalt shingles have a strict nailing schedule so the shingles are secure but don't leak. I have included a link to an illustration for an asphalt shingle nailing schedule below.
23$ plus/ bundle