Should you repair or replace your stucco?
Updated August 2026
← Every repair-or-replace call
Crack filling, patching, and a fresh finish coat handle most stucco problems for $500–3,000; a full tear-off and re-stucco at $8,000–25,000 is reserved for delamination, systemic cracking, or trapped moisture behind the wall. Traditional three-coat stucco is a 50–80 year cladding, and hairline and settlement cracks in it are normal rather than alarming. The question that decides the money is never how the surface looks from the driveway. It is whether water has gotten behind the stucco and stayed there, and answering that takes a moisture probe, not a walk-around.
The short version
Sort the cracks first. Hairline cracks under about 1/16 inch, and the diagonal ones that radiate from window and door corners, are shrinkage and settlement, and they get filled with an elastomeric patch and recoated for $500–3,000. Cracks wider than 1/8 inch, horizontal cracks, cracks that keep growing season to season, and any area that sounds hollow when tapped point to a wall failing behind the finish. That is where a moisture test earns its fee: a technician drills small probe holes at the base of walls and around penetrations and reads the sheathing moisture directly. Wet readings on a one-coat or synthetic EIFS wall are the classic scenario that turns a cosmetic quote into a full redo, because those assemblies can hold water against the sheathing with no drainage path. Budget $400–1,000 for the inspection. It is the cheapest way to stop guessing on an $8,000–25,000 decision.
Your situation, decided
| Situation | Verdict | Why |
|---|---|---|
| Hairline cracks under 1/16 inch across the wall | Repair | Fill and recoat for $500–3,000; normal shrinkage in stucco |
| Diagonal cracks at window and door corners | Repair | Settlement stress points; patch, mesh, and seal the openings |
| Cracks wider than 1/8 inch or growing each year | Test, then decide | Something is moving behind the finish; get a moisture test |
| Hollow sound when tapped, finish separating | Replace that wall | Delamination from the lath; patching a loose field will not hold |
| Wet sheathing readings on a one-coat or EIFS wall | Replace | Trapped water rots the wall; it needs a real drainage plane |
| Staining and streaking below windows only | Repair the flashing | The sill or kickout flashing failed, not the stucco field |
| Rust stains and bulges along the lath lines | Replace that section | The metal lath is corroding; new finish cracks right back |
| White powdery bloom on the surface | Repair | Efflorescence marks a water path; find the source, wash, then seal |
What each path costs
Repairs typically run $500–3,000; a replacement is $8,000–25,000 installed. Traditional three-coat stucco lasts 50–80 years, while synthetic EIFS and one-coat systems run 20–40 and fail sooner if water gets behind them. Moisture forces a redo, not age. Price your own number on the home maintenance cost calculator before you commit either way.
The repair-or-replace call is easy when you know the unit's age and service history. OnOtto keeps both, plus the maintenance that delays this decision for years.
Start your home's service log, freeFrequently asked questions
Are cracks in stucco normal?
Hairline cracks are, and every stucco house gets them. Cement shrinks as it cures and the building moves with temperature and settling, so fine cracks under about 1/16 inch come with the material. Buy a $5 crack comparator card and record widths in a few spots each spring, which turns an anxious guess into data. Cracks that hold the same width for years are cosmetic and get sealed at the next recoat. Cracks that widen, run horizontally, or step through the wall deserve a professional look before they start letting water in.
What is a stucco moisture test?
An inspector drills small probe holes through the stucco at the base of walls, under windows, and near penetrations, then reads the moisture content of the sheathing behind with a pin meter. Readings under about 15% are dry, and anything sustained above 20% means water is being held against the wall. The holes get patched afterward. Expect $400–1,000 for a whole-house test, and treat it as mandatory before buying a synthetic-stucco home or approving a large repair. It is the only way to separate a $2,000 cosmetic job from a $15,000 wall rebuild.
How often does stucco need sealing or painting?
Every 5–10 years for an elastomeric coating, closer to 7–10 for a quality masonry paint, with sun-facing walls coming due first. The coating is what keeps a porous cladding shedding water instead of soaking it, and it bridges the hairline cracks that reopen every year. Expect $2–5 per square foot, so $3,000–8,000 on an average house. Wash the wall and fill the cracks before coating, because paint over dirt or an open crack fails early. A steady reseal schedule is what carries stucco toward its 50–80 year potential.
Is synthetic stucco riskier than the real thing?
Older synthetic systems are. Barrier EIFS, common on homes built from the late 1980s through the 1990s, has no drainage path, so any water getting past a window or a deck ledger is trapped against the sheathing and rots it quietly. Drainable EIFS installed since then performs far better. Traditional three-coat stucco over building paper and lath drains by design. If your home wears a synthetic system, inspect and reseal every penetration, keep the kickout flashings clear, and moisture test before you assume the wall behind it is fine.