A good roof installed by professional contractors should last for 15 to 20 years or even longer. The amount of time the roof lasts depends on the materials used, with metal and ceramic roofs lasting longer than those featuring asphalt or composition shingles. Depending on the condition of the roof, contractors may determine that repairs are not enough and that the roof needs replacing. Homeowners should contact a Charleston roofing company, which will then send a contractor to their home and have that person check the roof’s condition and other factors before giving an estimate for replacement.
One factor that determines the replacement cost is the size of the roof. Contractors will need to measure the total square footage of the roof and use that measurement to determine the number of “squares” needed to cover the roof. Shingle manufacturers sell shingles by squares and not square footage. A roof measuring 100 square feet might need 25 or more squares of shingles. If the home has any unusual slopes or valleys that change the overall square footage, they may need to spend more on both materials and labor for replacing the roof.