the difference between a political and a physical boundary is that a physical map shows geographical features like mountains and rivers while a political map shows boundaries.
Standard Weight. Standard asphalt shingles generally weigh about 190 pounds per 100 square feet, based on information from U.S. Inspect, a property inspection company. The weight of asphalt is especially important if you want to install a new layer of asphalt roofing over an existing layer.A roof measuring 1,600 square feet that has two layers of standard asphalt shingles on it is holding about 6,000 pounds of shingles..S. Inspect indicates that dimensional shingles can be 50 percent heavier than standard asphalt roofing. Therefore, they could weigh about 285 pounds per 100 square feet. Heavier shingles reduce the chance the underlayment will wrinkle, according to the National Roofing Contractors Association.
Asphalt Shingle Roof Costs. Asphalt shingle roof costs range from $2.75 to $5.75 per square foot, which includes both materials and labor. These replacement prices are on the lower end of the pricing spectrum in terms of all available materials.âFor a 2000 sq. ft. home, homeowners will spend between $5,500 and $11,500 for asphalt shingles.raditional asphalt shingle roof cost (woven fiberglass covered with apshalt coating) runs $75 to $125 per square (not including installation). Ths option is thinner and lighter than the organic variety and typically carries a longer warranty.