Do you install replacement windows year-round?

Do you install replacement windows year-round? If so, will I lose a lot of heat/cooling at the time of installation?

We do install windows year-round and take precautions to mitigate any heat or cooling loss by only exposing minimal areas at a time by closing interior doors when possible to minimize effects on unaffected areas, and doing as much prep work as possible prior to removing the old window to minimize the time the interior of the home is exposed to the external environment.