I’ve seen many doors and windows with no insulation around them. It may pay to remove the wood trim carefully to see whether the narrow cavity is insulated.

The openings of these windows cannot begin higher than 44 inches from the adjacent finished floor. Additionally, the window must open to a net clear 20-inch minimum width and net clear 24-inch height.

Crystal furnished the project with a total of 4,261 vinyl windows and doors, including single-hung, fixed, casement, and ...