Insulation is often something that is overlooked by many homeowners, an out of “out of sight, out of mind” situation. However, insulation is one of the most important components of a home. It’s what keeps you warm in the winter, and cool in the summer. It works with the HVAC system to ensure a comfortable indoor temperature year round. In newer homes, insulation should last for many years without needing to be replaced. However, here are three circumstances, especially in older homes, where new insulation should replace the old, or even added to existing insulation.