Walk into the garage of most Gwinnett County houses built in the last forty years and you find drywall that was hung, taped, and then left: gray paper, white stripes of joint compound, and screw heads dimpled with mud, because many builders finish a garage only as far as the building code requires. Painting it turns a storage room into a space that is brighter, easier to keep clean, and more pleasant to walk through twice a day, and the work is the same in a Buford two-car garage as in a three-car bay in Hamilton Mill.
Finishing taped drywall first
Fire-taped walls are not ready for paint. The tape seams and screw heads get a second and third coat of compound, feathered wide and sanded, so the joints do not show through the paint as stripes. The whole wall then gets a drywall primer, because bare paper and dried compound soak up paint at different rates, and a single coat over both dries blotchy. Two finish coats follow. Most owners choose a light gray or a warm white in eggshell or satin that wipes clean, since garage walls collect tire spray, red clay, and handprints.
Ceilings, block walls, and the door to the house
The garage ceiling, usually the same taped drywall, is painted a flat white that spreads the light from a single bulb or the door opener. Concrete block and poured walls, common in the basement-level garages of hillside lots around Dacula and Lawrenceville, are cleaned and coated with a masonry primer or a breathable masonry paint rather than ordinary wall paint, because moisture moves through them. The door from the garage into the house is a solid or fire-rated door that the building code calls for; it is painted like any other door, with any rating label left unpainted.
Temperature, humidity, and timing
A garage is not climate-controlled, so the calendar matters more than it does indoors. Latex paint needs the air and the wall above the minimum printed on the can, often fifty degrees and lower for some products, through the whole drying time, and a Gwinnett garage can sit below that for days in January. July brings the opposite problem: humid air that slows drying to a crawl. Spring and fall are the easy seasons, and a winter garage job is scheduled around a warm stretch.
What the job covers
A coated floor, such as epoxy, is its own trade with its own preparation, so this work covers the walls, ceiling, doors, and trim. Shelving and storage systems come down or are worked around, and anything electrical, such as moving an outlet or adding lights, belongs to a licensed electrician. In a house built before 1978, old painted surfaces in the garage get the same lead-rule check as the rest of the house before anything is sanded.