Insulating a crawl space involves adding a layer of thermal protection to the underside of the subfloor or the crawl space walls. This practice creates a thermal barrier, reducing heat transfer between the crawl space and the living areas above. For example, fiberglass batts might be installed between floor joists, or rigid foam board insulation could be applied to the foundation walls.
A properly insulated crawl space offers significant advantages. It can lower energy bills by reducing the amount of heating and cooling lost through the floor. Furthermore, it contributes to improved indoor air quality by minimizing moisture, mold, and pest problems often associated with uninsulated spaces. Historically, crawl spaces were often left uninsulated, leading to drafts and increased energy consumption. Modern building practices increasingly recognize the value of crawl space insulation for improved energy efficiency and healthier home environments.
