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.
In light of regional climates, Roofhelp.com reports that the average life span for shingle roofs with a 20-year warranty in Phoenix, Arizona, is approximately 14 years, in Minneapolis, Minnesota, approximately 19.5 years and in Reading, Pennsylvania, approximately 20.8 years.