Not every hole needs a fresh sheet of drywall, and lath-and-plaster walls need a different approach entirely. Here is how to tell them apart.
A doorknob through the hallway wall, a row of nail heads showing through last year's paint, and a brown ring on the ceiling under the upstairs bathroom are three completely different repairs, and treating them the same way is why so many patches still show a year later. The right method depends on the size of the opening, what sits behind the wall, and whether something caused the damage that will quietly go on causing it again.
Size sets the method. Anything under about half an inch, including screw holes and small dings, takes lightweight spackle on a putty knife and a single sanding. From half an inch up to roughly six inches, a California patch, where you peel the paper backing off a scrap of drywall to create a built-in feathering edge, is stronger and faster than a self-adhesive mesh patch. Beyond six inches, cut the opening square, add wood backer strips inside, and screw in a fitted piece.
Plenty of Bay Area homes built before about 1950 have lath and plaster rather than drywall, and the repair is genuinely different. Old plaster fails because the keys squeezed through the wood lath break loose, so the surface flexes when you press on it. Plaster washers screwed through the loose field into the lath pull it back tight before anything else happens. The patch is then built up in layers to match a three-quarter-inch wall thickness, using setting compound rather than premixed mud.
Nail pops and hairline seam cracks are movement, not damage. Framing lumber dries and shrinks, and the seasonal swing between a damp Bay Area winter and a dry heated interior moves everything a little. The fix is to drive a drywall screw about an inch and a half above and below the popped fastener to re-anchor the board to the stud, then set or remove the original nail, then fill. Simply skimming over the pop guarantees you will see it again.
Compound choice matters more than most people expect. Setting-type compound, sold as twenty-, forty-five-, or ninety-minute mud, cures chemically and is what you want for deep fills, plaster repairs, and any day when the house is damp. Premixed all-purpose compound dries by evaporation, and in a foggy Sunset or Richmond District flat that can mean waiting a full twenty-four hours between coats instead of the eight the label promises. Run a fan and a dehumidifier if the schedule is tight.
Three coats is the standard, and each one goes wider than the last. Use a six-inch knife to fill, a ten-inch to build, and a twelve-inch to feather, carrying the final pass eight to twelve inches past the repair so the transition disappears under a roller. Sand between coats with 120 grit and finish at 150 or 220 using a sanding sponge. Hold a work light flat against the wall afterward to reveal ridges you simply cannot see head-on.
Texture is where amateur repairs get caught. Most Bay Area tract housing from the 1960s onward has orange peel or a light knockdown, while older homes and recent remodels often have smooth walls that demand a true level five finish. Aerosol texture cans work if you practice on cardboard first and hold them back roughly eighteen inches to get droplets rather than blobs. Knockdown gets flattened with a wide blade after the spray sets up for about ten minutes.
Prime before you paint, always. Bare joint compound is far more absorbent than the surrounding wall, and paint alone dries to a visibly duller patch, an effect called flashing. A drywall PVA primer evens the porosity out. Water stains need a different product entirely: a pigmented shellac-based stain blocker, because water-soluble tannins and rust bleed straight through latex primer. And fix the leak before you patch, or you will be repairing that ceiling a second time.
Small holes, whole walls, or plaster that has already been patched badly three times, we handle all of it. Benjamin Handyman Service repairs drywall and plaster throughout the Bay Area and can paint the room while we are there so the repair never shows. Call (801) 800-1349 for a free estimate on your repair list. Referrals and returning customers each save 15 percent.