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Building a durable driveway
Q: I am bidding a job where the owner wants to install a new metal roof over a double layer of asphalt shingles. The roof has solid lumber rafters and plywood sheathing. Should I install 1x4 horizontal purlins over the asphalt and attach the metal roof to those? Should the purlins be...
Rafter sizing chart for multiple shingle layers
Q: What is the best way to flash around a wood-frame-and-stucco chimney for asphalt shingle roofs?
Q: Is roofing felt necessary under asphalt shingles?
Q: What is the difference between organic and fiberglass shingles?
Q: Are there any drawbacks to reroofing over asphalt shingles? How many layers can accumulate before you should tear them off?
Q: Our clients are unhappy with the color of their roof now that the house has been painted. The asphalt shingles are less than two years old and are in very good condition. Is there any way to change the color of the shingles without replacing them?
Q: What is the life expectancy of hot-mopped asphalt on a flat roof? Will aluminum paint extend the life of the roof? If so, how often should the roof be recoated with the paint?
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