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 ...

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 ...

Q. I'm trying to educate myself about new construction, as I'm thinking of building a new home. I see carpenters nail on large sheets of wood onto the wall studs. What's the purpose of this funny ...

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 ...

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 ...

Question: 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 ...

Whether you work in construction or in a wood shop, plywood is a material you can’t avoid. I’ve used it outdoors to sheath roofs and walls, indoors for subfloors and room dividers, and in the shop for ...