Sealing and Insulating your home is one of the most cost-effective ways to make a home more comfortable and energy efficient—and you can do it yourself. Use This Guide To: Learn how to find and seal hidden attic and basement air leaks Determine if your attic insulation is adequate, and learn how to add more Make sure your improvements are done safely Reduce energy bills and help protect the environment Glossary of terms is included in this illustrated do-it-yourself guide.

Popular Mechanics inspires, instructs and influences readers to help them master the modern world. Whether it’s practical DIY home-improvement tips, gadgets and digital technology, information on the newest cars or the latest breakthroughs in science -- PM is the ultimate guide to our high-tech lifestyle.