Our Process
Inside a stucco repair on your Heathrow chimney
Why caulk is the wrong fix for stucco cracks
Caulking a crack is quick, which is why so many stucco chimneys carry lines of it. Preservation Brief 22 calls commercially available caulking compounds unsuitable for patching hairline cracks, because their texture differs from stucco, they weather differently and they attract more dirt, so the repair ends up easy to spot.
We do not run caulk over cracks on your Heathrow chimney. Where a crack is still moving, a flexible material can have a place, chosen and textured for stucco and used only after the crack has been assessed. Everywhere else the answer is a slurry, a coating or a proper patch.
Preparing brick so new stucco bonds
Stucco applied straight to masonry needs something to grip. Preservation Brief 22 describes raking out brick or stone mortar joints to a depth of about 5/8 inch where needed to ensure a good bond, and it notes that the irregular masonry or a scratched, roughened face provides the key.
On a brick chimney in Heathrow that has lost its stucco in places, our masons clean the exposed brick, rake soft joints where the bond calls for it and check the brick itself before new stucco goes on. Any loose brick found under the stucco is priced as a masonry repair on its own line.
Bonding agents and when they help
A properly cleaned and prepared area usually does not need a bonding agent, the brief says. One may be useful for hairline cracks or on surfaces that bond poorly, such as dense stone or brick or previously painted masonry, but it should not be used on a wall that is likely to stay damp or where large amounts of salts are present.
Our specialists rely on good preparation and a mechanical key first on your Heathrow chimney. If the surface calls for a bonding agent, we tell you why, name the product on the estimate and make sure the chimney is not one of the damp walls where the brief advises against it.
When the damage is in the framing
Stucco on a framed chase is only as good as the wood behind it. If water has rotted the sheathing or the framing, repairing the finish alone covers a structural problem, and that part of the job becomes chimney chase repair.
Our team tells you at the free inspection whether the trouble on your Heathrow chimney stops at the stucco or goes into the chase. Where it goes deeper, the chase repair and the stucco finish are priced together, so one crew carries the job from framing to final coat.
