Q: What is the correct way to install a two-ply roofing underlayment? I was quoted a price on two-layered underlayment for my roof (Fontana G40 underlayment). I asked how much overlap he uses in his installs and he answered 2-4 inches. I was very confused as I have read your information and then confirmed with the TRI Installation Guide (page 17) that there should be 18-19 … [Read more...] about How To Install Two-Ply Roof Underlayment?
Q: Our original concrete tile roof, a little east of San Diego, is around 30+ years old with a roof pitch of about 6 in 12. My guess is that the underlayment should probably be replaced before adding solar panels. The tiles are in great shape with no cracks anywhere. The only problem is on the south end of the house where the fascia had some termites, so I cut off about a … [Read more...] about Reuse or Replace Concrete Tiles When Reroofing ?
Q: I have received proposals for re-roof of my house however each proposal calls for different underlayments with significant price differences. I live in Southeast Florida. I would appreciate guidance as to what makes the most sense. Thank you for your input; it is greatly appreciated! Proposal 1: - Install on Roof Deck Area: 2.1 One layer of 30# ASTM D-226 asphalt … [Read more...] about Peel-and-Stick vs. Hot Mop For Florida Roof Underlayment
Q: What is the best option for replacing a low-slope roof over an addition? We have a low-slope shed roof that was repaired with roll roofing as an emergency patch in 2014. We had ice damage which forced the roof repair, but because it was in the winter, only the lower half of the 23×12' area was repaired. The top half of the addition roof has asphalt shingles where it … [Read more...] about Best Low-Slope Roofing Option
A: What is the best underlayment for a tile roof? Our house in Los Angeles is 25 years old. One roofer recommended removing the composite roofing tiles and replacing the old underlayment with 90-pound paper. Then they will replace the roofing tiles. Another roofer recommended the same approach, but with two layers of 30-pound felt as the underlayment. Please explain the … [Read more...] about Best Underlayment for Tile Roofs