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If you plan on heating your garage, you must install a vapor barrier when drywalling the garage. A vapor barrier protects your garage from frost and mold that can occur through condensation. If your garage is unheated, you don't need to install a vapor barrier. The only exception is if you regularly crank the heat in your car before getting in it. In this case, you may still want to install a vapor barrier, as your car can heat your garage.

Beadboard is a decorative element and lacks the structural integrity of drywall. It cannot hold much weight and is not meant to be used as an insulator or moisture barrier, like drywall is. In almost all cases, beadboard is placed over an existing wall surface which, in modern days, is usually drywall, but decades ago could have been wood paneling.

The average life span for drywall is between 40 and 60 years, although panels can last significantly longer in many cases if it’s well-maintained. Of course, many things can reduce the life span of your drywall, including fire, smoke damage, water, moisture, and physical damage, like dents and holes. Thankfully, you’re likely to get around 50 years of value out of professionally-installed drywall, making the $2,000 you’ll spend on the job well worth it in the long run.

For maximum stability, install grab bars on wall studs, as this will adequately support the weight. However, if you don't have access to studs, you can get by with wall anchors. If opting for the latter, choose specialty hollow wall anchors.