![Curling Shingles on a Roof](http://showalterroofing.files.wordpress.com/2009/08/roof-1.jpg?w=300)
Granule Loss
When a roof reaches the end of its life the granules on the shingles come off more readily as the asphalt that holds them in place begins to deteriorate. Watch for granules in your gutters washing out onto your lawn, or the roof turn dark as the asphalt is exposed. Shingles may begin to curl when asphalt breaks down allowing water to penetrate the core of the shingle.