If you're looking for the doors (and windows) of perception east of the Mississippi, try MW Manufacturers. The company makes and distributes a variety of doors and windows for the residential construction industry. Its products range from patio doors to accent and stationary picture windows. MW's door and window products come in clad-wood (PVC cladding form-fitted over a solid wood frame), vinyl, and wood varieties. It also sells complete sash replacement systems. The company targets building material wholesalers, lumber yards, and retail home centers as its primary customers. MW Manufacturers, which began operating in 1939, is owned by Ply Gem Industries.