Damaged stucco is the last chapter of a story that started somewhere else. Crumbling at the base of a wall, a soft spongy area under a window, a section that has separated from the lath and sounds hollow: in almost every case the material failed because water reached it and stayed. A repair that grinds out the bad stucco and trowels in new mix without answering how the water got there is a cosmetic delay, and the same square foot fails again on roughly the same schedule.
The second half of stucco repair is matching, and it deserves plain talk up front. Stucco cures and weathers, so the wall you are patching into is no longer the color or the surface it was when it was new. Fresh material will read as fresh material, and the texture is applied by hand, so it carries the signature of whoever applied it. A good contractor tells you at the estimate whether your repair will blend, need a fog coat over the area, or make more sense as a full recoat of that elevation.
Before anything is opened, the wall gets looked at as a system: where the damage sits relative to openings, roof lines, decks, and grade, and what that position suggests about the water path.
The failed area is cut back to sound material, which exposes the lath and barrier behind it. That is where the actual cause shows up, usually a flashing detail or a barrier lap that was never right.
Barrier and flashing get corrected first, then lath, then the coats, built up so the repair has the same thickness and behavior as the wall it is tying into rather than sitting proud of it.
Texture is matched as closely as hand work allows, then you decide together whether the area is left as is, fog coated to even the color, or recoated to a natural break in the wall.
Stucco repair pricing turns on a few things, and square footage alone is not one of them. First is extent: a single failed area is a different job from damage running the length of an elevation. Second, and biggest, is depth. A repair that stops at the finish coat is modest. A repair that has to reach the barrier, correct flashing, and replace corroded lath is another scope entirely. Access matters, since second-story and gable work adds staging. Then the finish decision: living with a visible patch, fog coating the area, or recoating a whole elevation are three different numbers, with trim, screed, and flashing work on top.
You can, and sometimes that is the right call, for example on impact damage on a dry, well-drained wall. But if the stucco failed because it was wet, patching only resets the clock. The material will fail again from behind, usually within a couple of Utah freeze-thaw seasons. The question a contractor should answer before quoting is whether the damage is mechanical or moisture-driven.
Texture can usually be matched closely by a skilled hand. Color is the harder half, because your existing wall has cured and weathered and the new material has not. Expect the repair to be visible at first, and expect it to change as it cures. If a seamless appearance matters to you, plan on a fog coat over the area or a recoat to a natural break in the wall.
You often do not until it is opened. Sound stucco rings when tapped and damaged or delaminated stucco sounds hollow, so sounding out the wall gives a rough boundary. Moisture readings around the area help too. But the true extent shows up when the failed material is cut back and the lath and barrier behind it become visible, which is why estimates sometimes come with a range.
It raises the priority. A musty smell on an exterior wall usually means water has been sitting behind the cladding long enough to affect sheathing or framing, not just the stucco. That moves the job from a finish repair to an intrusion investigation, and the interior side may need to be opened as well to see how far it went. Get eyes on it sooner rather than later.
Hairline crazing is normal. Stair-step cracks at corners, diagonals running off window and door openings, and horizontal lines at floor level are telling you something. Diagnosis comes first, filler second, because a patched crack that keeps moving comes back.
Learn more →New stucco is built in layers over a weather-resistant barrier and lath, and a re-stucco is your chance to correct what the old assembly got wrong. A recoat changes the face of a wall. It does not fix drainage.
Learn more →Synthetic stucco is a different assembly from cement stucco, foam and thin coatings rather than cement over lath. It fails differently, probes differently, and repairs differently. Guessing which one you have is how money gets spent on the wrong fix.
Learn more →Water almost never comes through the field of a wall. It enters at a window head, a roof-to-wall junction, a deck ledger, or a weep screed buried in soil, then travels behind the stucco until it finds framing to sit against.
Learn more →Get the wall diagnosed before anyone mixes patch material.
Request a DiagnosisA few details about your stucco and your city is all we need to make the connection.