Saving thousands of dollars over time is no exaggeration about the effects of adequate insulation in homes and buildings. Insulation creates a buffer against the transfer of heat. Heat is one of the most powerful forces in the universe and it’s always moving from hot to cold.
In the summer, heat wants to move into cooler spaces, like your home. In the winter, the process reverses and it escapes into the outdoors where it’s cooler. It takes a great deal of energy to stop heat from moving to cooler temperatures, but insulation thwarts it.