They are definitely measured differently. The insert window you would measure inside the existint window frame, which in most cases is built out of 3/4" lumber all the way around. For a full replace ... read more
Wood on the enrty will help stop it, also find the end of the part of the carpet that has begun to unravel and cut it with a sharp knife or clip with a sissors and place a drop of glue on the end down ... read more