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Q: We live in a 1925 Berkeley bungalow. The attic is insulated with blown-in cellulose and meets the current code for thickness. Also, the entire underside of the house is insulated with fiberglass.

Getting hit with a huge utility bill is unpleasant, but it’s even worse when you know that it’s high due to heat or air conditioning loss through the doors, windows, or walls. Fitting exterior walls ...

Some types of insulation are cheap and easy to use, but they may come with significant drawbacks, like being vulnerable to ...