How Insulation Slows Heat Flow

Insulation does not create heat, and it does not permanently trap it. It slows the rate at which thermal energy crosses the building enclosure. Tiny pockets of air resist conduction and convection. Reflective surfaces can reduce radiant exchange in the right configuration. Air sealing limits warm air from carrying heat through cracks. General education only, not repair, installation, inspection, or code-compliance advice. Use qualified professionals and local requirements when action is needed. Sources and further reading: - U.S. Department of Energy Building Science Education, Types of Insulation: https://bsesc.energy.gov/energy-basics/types-insulation-0 - U.S. Department of Energy, Guide to Home Insulation: https://www.energy.gov/sites/prod/files/guide_to_home_insulation.pdf - U.S. Department of Energy, Air Sealing Your Home: https://www.energy.gov/energysaver/air-sealing-your-home