Tag Archives: U-factor

What Affects the R-Value of a Building?

Doors and windows effect R-value of a building

This is part two of our posts on R-value.  Read the first post to get a definition of R-value and find out what it means to you. Doors and Windows As much as we love, and need, doors and windows, they are not good for a building’s insulation value.  Doors open and close, allowing air…