Assess
Assessing patch size to determine the right repair method.
Not every hole in a wall needs the same fix. A nail hole from a picture frame and a fist-sized hole from a doorknob call for genuinely different repair approaches, and using the wrong one is exactly how a "quick patch" ends up looking like a quick patch six months later.
Assessing patch size to determine the right repair method.
Feathering and blending compound into the surrounding wall.
Final sanding and texture matching for a seamless finish.
Small holes, nail pops, screw holes, anything under about an inch, usually just need joint compound built up in thin layers directly over the hole, since there's enough surrounding drywall to hold the patch in place on its own. Once a hole gets bigger than that, there's nothing left for the compound to grip, so it needs backing, either a scrap of drywall wedged in behind the hole or a self-adhesive mesh patch, before any compound goes on at all. Skip the backing step on a larger hole, and the patch will crack loose the first time someone bumps the wall.
The other detail that matters more than people expect is feathering, tapering each layer of compound out several inches beyond the edge of the actual damage, rather than building it up in one thick blob directly over the hole. A patch that isn't feathered wide enough always leaves a slightly raised or sunken spot that becomes obvious once light hits the wall at the wrong angle, even if the color match is perfect.
Generally, anything under about an inch across can usually be filled with joint compound alone, since there's enough surrounding drywall to hold the patch. Once a hole approaches an inch or larger, backing material behind it becomes necessary for a durable repair.
Not if it's done correctly. A properly feathered patch, tapered several inches beyond the actual damage, and matched to the surrounding texture, should blend in completely once primed and painted. A patch that looks slightly raised or sunken usually means the feathering wasn't wide enough.
We generally recommend against it, since an improperly backed or feathered DIY patch often needs to be redone before we can finish it properly, which can end up costing more than starting fresh. If you're unsure, it's worth calling before attempting a repair yourself.
Most single-hole patches can be completed in one visit, though the joint compound needs time to dry between coats, so texture matching and final finishing sometimes happen on a return trip a day or two later.