R Value: A term you need to know when upgrading attic insulation
Before you choose attic insulation, it’s important to learn the efficiency rating of the different materials to ensure a high return on investment. Just like a furnace rated 90 annual fuel utilization efficiency (AFUE) outperforms a system with an 80 AFUE, some insulation performs better than others. R Value helps you conduct a side-by-side comparison. […]