• Are your shingles dried out and cracking? You my have water penetrating your roof deck causing rot and decay.

  • Curling Shingles: These are indications that the shingles are nearing the end of their lifespan. If you see (or don’t see, as the case may be) lots of these types of shingles, you should consider getting your roof replaced.

  • An excessive amount of shingle granules (they look like large grains of sand) in the gutters or are missing from your roof -- this is a sign of advanced wear.

  • Shingles that are dark, dirty, or even wet. If shingles are allowing moisture to be trapped, they aren’t doing their job. Keep in mind that the wetness may not be right under the offending shingle (since water runs downhill).

  • Roof Deck is Sagging: If you notice the decking or rafters in your attic are sagging downward instead of remaining straight, they may be wet from leaking moisture. If it’s localized, you may be able to avoid a complete roof replacement.

  • Wear and tear around roof objects and openings: Chimneys, vents, pipes, and other objects that penetrate your roof are places where deterioration may initially develop. Often, the fixes can be confined to these specific areas.

  • People do notice. Your roofing material can actually enhance your home's curb appeal. (Hall confirms that, on average, 40 percent of what you see from the road is the roof!) And Realtor Mag includes roof replacement in the top ten valuable home improvement projects and reports that homeowners can expect to recoup 56.7 percent of these costs when selling.

  • Blocked Soffit: If your roof ventalation is restricting the air flow your attic temperature may be too hot in the summer and in the winter you could have condensation issues.

  • Buckeling: With severe leaks and substansial damage underneath, buckeling can occur.

  • When you take a look at the exterior of the roof, pay attention to such things as damaged flashing, missing shingles, curling, blistering, buckling, rotting and algae growth (which occurs most often in humid climates and appears as dark or greenish stains).