Dayton Exterior Services
Some stucco cracks are cosmetic. Some mean water is already behind the wall. We’ll tell you which one you have.
Stucco
Stucco is one of the few exterior surfaces where the damage you can see tells you very little on its own. A wall covered in fine cracks can be perfectly sound. A single diagonal crack at a window corner can mean something is moving.
What matters is the pattern, where it sits, and which of the two stucco systems you actually have — because they are repaired differently.
We repair stucco throughout Dayton, Kettering, Centerville and Beavercreek, and the assessment comes before the quote every time.
Repair and repainting often go together — see exterior painting. If the damage came out of a storm, start with storm damage repair. For other cladding, we also handle siding repair and full siding services.
Crack patterns
Four patterns cover almost everything we are called out to look at. Two are usually cosmetic. Two are not. Select the one that matches your wall.
Usually cosmetic
Hairline and spider cracking. Fine, shallow, irregular cracks spread across a field of wall. This is largely what stucco does as it cures and as it moves with temperature. It still matters here: a hairline crack that fills with water and then freezes opens a little further every cycle, so sealing and re-coating is what keeps it cosmetic.
Usually repairable
Map or pattern cracking. A fairly regular grid, roughly following the lath or the panel joints behind the surface. It generally points at how the wall was built or how the coats were applied rather than at movement in the structure. It is repairable — but the cause is worth pinning down first, or the same grid works its way back through the patch.
Find the cause first
Diagonal cracks from opening corners. Running at roughly 45 degrees away from the corner of a window or a door. Corners concentrate stress, so this is where movement shows up first, and it is also where corner reinforcement is doing its work. Filling the crack addresses neither, and the filler cracks again along the same line. This one gets investigated before it gets patched.
Water is already behind it
Bulging, hollow, or staining below an opening. A discoloured band running down from a sill, an area that sounds drummy when tapped, or a section that gives slightly under pressure. That is water behind the system rather than on it. A surface repair over the top seals the damage in and hides it while it carries on. This needs the wall opened and the water path found.
Two systems
Two wall systems can look similar from the street and need different repairs. Establishing which one you have is the first thing we do.
Cement-based, applied in coats over lath and a weather-resistant barrier. It is hard, heavy, and it drains and dries. Cracks in it are cracks in a cement surface, and they are repaired with cement-based materials over the reinforcement behind them.
Exterior Insulation and Finish System: an insulated foam board carrying a thin acrylic finish coat. It is much lighter than cement stucco and it insulates better. Earlier barrier-type EIFS assemblies were built without a drainage path behind the finish, so water that got past the surface had no route back out; later drainable assemblies include one.
Tap it. Traditional stucco is solid and unyielding. EIFS sounds hollow and gives very slightly under a knuckle. The thickness at a window return and the way the finish meets trim are two more tells. Treat all of that as an indication rather than a diagnosis — confirming it is part of the assessment, not something to settle from the driveway.
Patching EIFS with cement stucco does not bond to it and traps moisture against the foam. Treating traditional stucco as though it were EIFS misses the reinforcement behind the coats. The repair has to match the system, which is why identifying it comes before the quote.
We identify the system before we quote. If your wall turns out to be EIFS, we will tell you at the assessment and be straight with you about what that repair involves and who is best placed to carry it out.
Local conditions
Water that gets into a hairline crack and then freezes expands, and the crack widens slightly on every cycle. Southwest Ohio delivers that cycle over and over each winter. It is why a crack that was cosmetic in October can be doing real work by March, and why sealing before winter matters more here than it does in milder climates.
Process
Ten steps, in order. The first six happen before anyone opens a bag of material.
Why AlphaOne
Interest-free financing options are available on exterior projects, and the work is covered by the AlphaOne Advantage Warranty. The certifications and training we hold are listed on our certifications and trainings page.
Some are. Fine, shallow, irregular cracking spread across a wall is largely what stucco does as it cures and as it moves with temperature, and on its own it is usually cosmetic. What is not normal is a crack running diagonally from the corner of an opening, a crack that keeps opening season after season, or a soft or hollow area. Those are telling you something about what is behind the surface.
Three signals move a crack out of the cosmetic bracket: it runs at an angle away from a window or door corner, it is wide enough to catch a fingernail or has kept growing, or the wall around it is stained, bulging, or sounds hollow. Any one of those is worth an assessment before winter rather than after it.
Traditional stucco is cement-based, applied in coats over lath and a weather-resistant barrier. It is hard, heavy, and it drains and dries. EIFS, an Exterior Insulation and Finish System, is an insulated foam board carrying a thin acrylic finish coat; it is much lighter and it insulates better. Earlier barrier-type EIFS assemblies were built without a drainage path behind the finish, so water that got past the surface had no route back out. Later drainable assemblies include one. They are different systems and they are repaired differently.
Tap the wall. Traditional stucco is solid and unyielding; EIFS sounds hollow and gives very slightly under a knuckle. The thickness of the wall at a window return is another tell. Treat both as indications rather than a verdict. We confirm the system as part of the assessment rather than asking you to work it out yourself.
Openings interrupt the wall, and the corners of an opening concentrate whatever movement the building is doing. That is why the first crack in an otherwise sound elevation often shows up there, running away at roughly 45 degrees. It is also where corner reinforcement is doing its work, so a crack in that position is worth understanding rather than simply filling.
Caulk over a hairline crack buys time, and on a genuinely cosmetic crack it can be a reasonable part of a maintenance routine. It is not a repair for anything that is moving or anything that is wet. Caulk stays flexible and the wall does not, so on a moving crack it opens along the same line, and on a crack that is admitting water it seals the water in rather than out.
That is the part that takes skill. Stucco textures are applied by hand and vary from house to house, sometimes from elevation to elevation, so matching is done by working up samples against your actual wall rather than by picking a product off a shelf. On a weathered wall a repaired area can stay faintly visible until it has weathered too, which is one reason re-coating a whole elevation sometimes makes more sense than patching.
New material and weathered material rarely read as the same shade straight away, even with a good color match. Where an exact match matters, the usual answer is to re-coat or repaint the full elevation rather than the patch alone. We will tell you which one your wall needs at the assessment rather than after the repair.
We do not publish figures, because the drivers vary too much between houses. What moves the number: how much of the wall is affected and across how many elevations, whether the cause is on the surface or behind it, access and storey height, whether reinforcement or flashing has to be put right, how difficult the existing texture is to match, and whether the elevation needs re-coating afterwards. All of it goes into a written estimate.
It depends on the size of the affected area, what we find once it is opened up, curing time between coats, and the weather. Rather than give a generic answer we put a date range in the written estimate, and we tell you promptly if it moves.
Cement-based materials need temperatures above a certain point to cure properly, and Ohio winters do not reliably provide them, so full repairs are usually scheduled for milder weather. Urgent work to keep water out can often be done sooner as a holding measure. If your wall is already letting water in, that is a reason to call before winter rather than to wait it out.
Both usually mean the surface has separated from whatever is behind it, and water is the common reason. Water that gets in through a crack, a failed sealant joint, or missing flashing sits behind the surface and the bond gives up. A drummy or bulging area is not a surface problem, and treating it as one hides it rather than fixing it.
It depends on the cause. Sudden damage from a covered event, such as a storm or an impact, is more likely to be covered than damage that developed slowly from long-term water entry or from how the wall was originally built. Your policy and your adjuster decide that, not us. What we can do is document what we find so you have something to submit.
Our workmanship is covered by the AlphaOne Advantage Warranty. Materials carry whatever warranty their manufacturer publishes. Where a repair is a holding measure rather than a fix, because the underlying cause needs larger work, we say so in writing up front rather than warranting something that was never going to last.
A professional assessment, an honest read on repair versus remediation, and a clear written estimate either way.
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