Insulating a house can lower its heat loss by up to 75 percent. Even partial insulation can cut heat loss by up to 30 percent. The higher the R-value of insulation, which is a measure of resistance, the more resistant the insulation is to heat flow. The idea is to keep warm air in and cold air out in the winter, and to keep cool air in and warm air out in the summer.
One of the easiest DIY insulation choices is spray insulation, which begins as a liquid and once released into the atmosphere becomes solid. The spray insulation can expand up to 100 times its volume, creating a complete barrier. If you are insulating an attic, you will need to use open-cell spray insulation so that it can breathe since attics generally require proper ventilation because of extreme temperatures. The walls of a home should be insulated with closed-cell insulation.
Protective clothing and goggles are imperative when tackling a spray insulation project. Plan this project in phases and insulate one area of your home at a time