Harrison McCampbell

Harrison McCampbell has been studying the effects of moisture on buildings and doing forensic work as a building-envelope specialist for more than 30 years. Harrison has worked across the United States and as far afield as Damascus, Syria. His newly remodeled home in Brentwood, Tenn., also serves as a home office for his busy one-man practice.

A Smarter Way to Flash
Removable two-part counterflashing allows access to roof flashings without digging in to the wall.
5 Roofs That Will Last a Lifetime
These premium products offer time-tested longevity, so your choice depends on price, appearance, and installation requirements.
A metal roof over old asphalt shingles?
Q: My house has two layers of asphalt shingles that are in excellent condition, but I’d like to cover them with steel roofing. Is it absolutely necessary for me to remove…

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