A building method employing a polyurethane or similar compound applied as a liquid that expands into a rigid foam, filling gaps and creating a thermal barrier during the initial phases of residential building projects. This process is often implemented shortly after framing and sheathing are completed but before interior walls are erected. For example, a builder might choose this method to enhance energy efficiency in a newly constructed house.
This approach offers advantages such as superior insulation R-value, air sealing to prevent drafts, and potential reduction in energy consumption for heating and cooling. The practice has become increasingly common as energy codes have tightened and homeowners seek more efficient and comfortable living spaces. Its adoption reflects a growing awareness of the long-term financial and environmental benefits of optimized thermal performance in residential buildings.
