Measure the distance from the bottom plate of the wall to a point that is 1 1/2 inches higher that the garage door height. Cut four 2 x 4 trimmers to this length and nail two each to either side of the rough opening. These trimmers should be on edge just as the studs in the wall rather than flat. Nov 15, 2013 – Learn how to frame a garage door opening for a new garage door. For a simple garage door installation you must prepare the opening . Follow this advice on garage door framing and framing your garage door should . The opening size for roll up and garage doors are different than other types of . HomeAdvisor’s Garage Door Cost Guide lists price information on installing or replacing a . Resizing the opening; Replacing hardware; Reframing the exterior . but they can withstand a lot more wear and tear than their cheaper counterparts. When framing for a 9′ X 7′ garage door, do you make the rough . Generally, I will make the rough opening for a 9×7 garage opening 9’3″x 7’1 . Shop our selection of 9(ft)x7(ft), Garage Doors in the Doors & Windows Department at The Home Depot. Shop our selection of Single Door, Garage Doors in the Doors & Windows Department at The Home Depot. Shop garage doors, openers and parts at Lowe’s. Find quality brands like Genie and Chamberlain online or in store. Browse single or two-car garage doors, .