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.
Your roofâs life depends on its materials. Most homes have asphalt or composite shingles. These last about 20 years, but the premium brands can go up to 50. Fiber cement will give you about 25 years. And architectural asphalt, which is thicker, holds for about 30 years, as does cedar shake.