You're probably well aware of the benefits that insulation provides during the heating season. Snug in your warm house during the winter months, you know that without a well-insulated house, you'd freeze and end up with expensive heating bills. Yet, the same dynamic occurs in the summertime if your home isn't properly insulated.
Anything you can do to cut summer heat buildup in your home will lower your cooling bills immediately and for years to come. It won't cost much, and it will make a big difference in your conditioning load. It could even improve indoor air quality. Your attic, windows and air infiltration are the best places to reduce the heat gain indoors.