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.
Aluminum shingles should last the lifetime of the home. Most aluminum shingle manufactures are warranting the roof for the limited lifetime of the first owner and a fifty year warranty for any additional home owners. Aluminum roofs are long-lasting, fire resistant and great for insulating.