What is the R-value of foam board insulation?
What is the R-value of foam board insulation? The R-value of rigid foam insulation varies based on the materials used and how many layers are installed. For example, our polyiso rigid foam boards have R-values between 6. If two layers are installed, it doubles the R-value and cuts heat/conditioned air loss in half. What Happens […]
What is the R-value of foam board insulation? Read Post »