Insulated garage door R-value: what R-18.4 actually saves
An attached garage is unheated space, so an R-18.4 door works as a buffer, not a furnace. Here is what the R-value really measures…
An attached garage is unheated space, so an R-18.4 door works as a buffer, not a furnace. Here is what the R-value really measures…
Sizes and finishes are confirmed at the free measure.