Photomicrograph of a volcanic lithic fragment (sand grain); upper picture is plane-polarized light, bottom picture is cross-polarized light, scale box at left-center is 0.25 millimeter. Volcanic rocks are usually fine-grained or aphanitic to glass in texture. They often contain clasts of other rocks and phenocrysts.
I paid almost $13,000 to have Duration Premium shingles installed on my central Florida home in late 2007. I went with Owens Corning Duration Premium shingles because of their premium quality, their lifetime warranty and their high wind resistance. Within 3 months of the installation, I started having leaks.
1 Installing CertainTeed Designer, Premium Designer, and Luxury shingles costs around $4 to $6 per square foot, or $8,000 to $12,000 for a 2,000 square foot roof.  If the cost to remove and dispose of old shingles is not included in the price, this could add an additional $1 to $4 per square foot.