Loose stucco on a chimney in Westchester, fixed properly
Our family-owned team explains the base, the cause and the options in plain terms.
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Stucco damage worth a closer look in Westchester
- Hollow sound when the stucco is tapped
- Paint peeling on one chimney face
- Dark streaks below the chimney top
- Stucco pulling away at a corner
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Our approach to stucco chimneys in Westchester
The scored first coat that anchors a patch
The first coat is scored with a comb while it is still soft. Those grooves give the next coat something to lock into, which is why plasterers call it the scratch coat.
On a chimney patch, we apply it to the cleaned base or to the lath, then let it firm up before the next layer goes on. Putting the next coat onto a scratch coat that is still too wet can weaken the bond. The right gap depends on the weather and the mix, so we plan the visits around it.
Reproducing the texture on a stucco chimney
Stucco textures range from smooth to heavily worked finishes. A textured surface can hide a well-made patch. On textured stucco, it is not usually necessary to replace a whole wall section for a repair to blend in.
Smooth stucco is less forgiving, because every change in plane or texture shows in low sunlight. We look at the existing finish closely and describe how we would reproduce it. If you have leftover finish material or a record of the original texture, share it with us.
What an elastomeric finish can and cannot do
Elastomeric finishes are thick, flexible coatings that can bridge fine cracks. They are one of the finishes used on stucco chimneys, and they can make a surface look uniform again. The choice between a breathable finish and an elastomeric one is made for your chimney, not by habit.
An elastomeric coat does not repair loose plaster, failed lath or a leak at the top. Because it forms a film, it can also slow drying if water gets behind it. We use one only where the stucco is sound, the water source has been dealt with and the product's data supports it.
Stucco layers separating from the base
Delamination is when stucco loses its bond to the base, or when one coat separates from the coat beneath. The International Masonry Institute lists it with cracking and spalling as common forms of stucco damage.
A delaminated area can look almost normal until it is tapped or until a piece falls. Because it can spread from a small start, we map its full extent before quoting. The repair removes the separated layers back to a sound bond, and the estimate states the area involved.
What we check before pricing stucco work
- Sealant at stucco transitions
- Adhesion check on the existing coating
- Open top covered at each day's end
- Hose water test when the job needs it
Stucco chimney repair, answered plainly
Do you replace the metal lath or reuse it?
Sound lath that has only pulled away can often be refastened. Corroded or torn lath in the repair area is cut out and replaced with corrosion-resistant lath lapped into what remains. The estimate says which we expect to do.
Can you repair the stucco if the chimney top also leaks?
We can, but the top should be dealt with first or at the same time. A patch below a leaking top tends to fail early. The top repair is listed separately, and we explain the order before you approve anything.
When is a hose water test part of a stucco job?
No. We run a hose water test only when the job calls for it, usually when the entry point is still unclear after the inspection. We explain why it would help before doing it.
More Ways to Care for Your Fireplace
- Chimney Sweep and Chimney CleaningArrange careful chimney cleaning in Miami with a defined scope, protected work area and useful findings.
- Chimney WaterproofingTreat suitable chimney masonry after checking the surface, repair needs and product requirements.
- Chimney Cap Installation and ReplacementProtect the chimney opening with a cap chosen for its fit, attachment and compatible system.
- Fireplace Hearth RepairRepair the hearth surface after considering the supporting assembly and fireplace requirements.
- Chimney Damper Repair and ReplacementRestore a usable damper mechanism after checking the plate, frame and control linkage.
We received your request
Our team will contact you to arrange your inspection.
Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo