Dr. Frances Graham, extension housing specialist at Mississippi State University, said there are four basic ways to keep homes cool. Conservation means keeping the cool air in and shading means keeping hot air out. Ventilation is the movement of air and conditioning is the process of cooling and dehumidifying the home using an air conditioner. Attic insulation is as important for cooling in the summer as it is for heating in the winter. We recommend insulation with an r-value of 30.
Insulation is an effective means of conservation.
Other cost-effective additions include floor and wall insulation as well as storm windows. Another way to conserve energy is to weatherize homes to keep out moist, hot air. The best way to weatherize the home is to caulk any cracks or crevices and weather strip doors and windows. Landscaping around the home can help in shading. Even porches could benefit from vines or other plants.