Different types of roofing.

1. Asphalt Shingles – They are the most common type of shingles used in the country today.  Most of these shingles are sold by the length of their warranty (i.e. 20-year, 25-year and 30-year. The difference is the weight and the design of the shingles.  Evan if you are told a new layer of shingles has been installed on the roof it is very important to view the shingles because depending on the area you live such as Florida (Southern State) shingles have been known to fail in 12 to 14 years. In most northern states with a higher pitched roof the shingles can last 25 or more years.   Roof with two layers normally never go bad in 12 to 15 years.2. Rolled Roofing- Is fabricated the same way as asphalt strip shingles.  Rolled roofing is generally installed on roof with less than a 4/12 slope.  We found the life of the product to be approx. 10yrs.3. Wood cedar Shake, terra cotta tile or slate shingles, metal – we recommend due to the expense of these types shingle you hire a professional who is knodgleable with each different roof covering.4. Rolled rubber roofing-  Always check for ponding of water, seams separating, signs of allegrating and check very carefully around the chimneys and vents for any separation or loose open joints.5. Metal roof – Metal roofing generally comes in two different types, either flat seam or standing seam. A standing seam metal roof generally last 75 to 100 years if properly maintained.  Maintance pertains to periodic scrapping and painting with rust resistance paint.