Layers and Roof Replacement Costs

David Groome, of Lansdowne, Pa., is a carpenter who worked in the roofing trade for over 14 years. Here he offers some advice regarding roof replacement costs. Groome said that most cities and towns in the country allow up to three layers of roofing, generally asphalt or similar types of shingles. "Sometimes you have to take a layer off, or if there is damage to the underlying wood, you'd need to perform repairs," said Groome.