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.

Insulation isn't one of the most glamorous aspects of your home. And hidden away behind your walls, it's easy for the average person to forget that it plays a pivotal role in the function of your home ...