You don't have to climb onto the roof to notice when chimney brick is starting to fail. In Greenbrier and the rest of Robertson County, chimneys take a beating from summer storms and the freeze-thaw cycles of a Middle Tennessee winter. Water gets into small cracks, freezes, and slowly pops the face off a brick or washes out the mortar. Left alone, that damage tends to spread.
Here are the signs that are worth a closer look.
Spalled or flaking brick
If the face of a brick is peeling, flaking or breaking off in sheets, that's called spalling. It usually means water has been getting into the brick. Once the hard outer face is gone, the softer inside weathers faster, so those bricks are the ones to replace rather than ignore.
Crumbling or missing mortar
Mortar joints should be mostly flush and solid. If you can see gaps, if the mortar looks sandy and is washing out, or if you can flake it away with a finger, water has a path in. On a chimney, tuckpointing those joints — cutting out the failed mortar and packing in new — is often enough when the bricks themselves are still sound.
Cracked or crumbling crown
The crown is the cement cap at the very top of the chimney. If it's cracked or crumbling, rain has a direct way into the brickwork below. A crown patch can close those openings when the damage is still limited. A fully failed crown or a chimney that needs to be rebuilt is a bigger job, and we'd tell you if that's what you're looking at.
Loose bricks
A brick that wiggles, or a corner that's starting to step out of line, is a sign the mortar holding it has failed. Catching that early is much simpler than waiting until a section starts to lean.
White staining
A white, powdery film on the brick, sometimes called efflorescence, is salt left behind when water moves through the masonry and evaporates. It isn't always a crisis on its own, but it is a clue that moisture is traveling through the chimney. It's worth finding where that water is getting in.
What we repair, and what we don't
We handle chimney brick and mortar repair, tuckpointing chimney joints, replacing spalled or cracked chimney bricks, and chimney crown patching. We don't do full chimney rebuilds, flue liners, or fireplace and gas work. If a job is past a repair, we'll say so plainly.
If you can see any of these from the yard, text a photo and your town to (865) 409-7887 for a free estimate. You can also read more about our brick and chimney repair work.