Poorly installed insulation can result in higher heating and cooling costs, comfort problems, mold and other moisture problems. Professionally-installed insulation meets industry best practices as specified for Grade 1 installation by the Residential Energy Services Network (RESNET). This includes no gaps, voids, compression, or misalignment with air barriers; complete air barriers; and minimal thermal bridging. This creates conditioned spaces that require very little heating and cooling, along with even comfort and quiet throughout the house.