What is the best step by step procedure for framing a basement?

If you are undertaking to frame your basement yourself, be aware of local building codes first. Some municipalities require a vapor barrier on the bottom sill plate that comes in contact with the concrete. Although pressure treated lumber is more costly than 6 mil poly, you can use pressure treated lumber to achieve better results. Your top plates only need be spruce as well as all of your studding. Be sure not to place your studs more than 16" apart on center as it creates a weak point for joints in drywall later. The myth that placing your studs at 24" is a way to save money will soon be lost when you later have to fix your walls where the taping has given way to a gentle push or settling of your foundation walls.

Door openings need to be 2" wider and taller than the door size you wish to install except for bi-fold doors which need to be 1 3/4" wider and only 80" in height. In Calgary window openings for bedrooms need to be a minimum of 30" x 54" but some inspectors will allow 24" x 48" for egress. Be sure to check with your building authority before planning a bedroom.