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.
Weather is a prime factor in shingle life span. U.S. Inspect notes that in hot climates, such as in Florida, asphalt shingles often deteriorate in 12 to 14 years. And, in northern states, such as Massachusetts, asphalt shingles on houses with high, sloped roofs and an eastern and or northern exposure can last 25 years.