Good insulation can keep a house cozy in winter, and cool in summer--while saving money and conserving energy. In amazingly thorough detail, with plenty of color illustrations, William P. Spence, author of such bestsellers as Carpentry and Building Construction , describes every step of insulating, sealing, and ventilating your home. He shows how to determine the amount of insulation needed, locate air leaks, regulate air quality, and determine the...