Can new plywood be installed on a 40-year-old roof without removing the old? Roy Gingrich of Ellicott City has a 40-year-old house with an asphalt shingle roof surface. The existing asphalt shingles ...

Dear Jerry: I have inspected hundreds of roofs, but this one has me puzzled. The house is a two story, about 20 years old. On the east side of the house only, the plywood for the first three trusses ...

Plywood is a staple material in the construction and woodworking trades. Here's how to recognize the grades and choose among ...

Copies of the National Association of Home Builders’ report on fire-retardant-treated plywood are available on request at telephone number (800) 368-5242. The report, “Investigation of Problems and ...

Q: Shortly after it was built, we noticed a slightly lifted-looking horizontal line (shingles not flat as the others) on the upper-left area of the roof when looking at the front of the house. The ...

In last month’s column (“Truckie on a Hot Peaked Roof ,” March), I addressed peaked-roof structures that truckies commonly encounter while running around atop a fire building. Understanding these roof ...

DEAR TIM: I’m in the process of installing a metal roof over an outside deck. My rafters are in place, and now I’m getting ready to purchase and install my flashing and sheathing. I was planning on ...