For example, if you had a batch file called stuff.bat and you typed stuff a b c d at the command prompt, the letters a, b, c, and d would be assigned to the variables %1, %2, %3, and %4, respectively.
Fiberglass shingles generally have a longer life expectancy than do asphalt shingles. Properly installed tiled roofs have a normal useful life of 20-30 years or longer, but individual pieces can become cracked or broken or the nails rust out.
You can use our area calculator to calculate the area of each surface. The most common roof materials in the United States are shingles, membrane roofing, ceramic tile, etc. Typically shingle roofs have a life expectancy of 15 to 30 year. Membrane roofing normally can last 5-15 years.