Chimney Repair in Mokena, IL — Crowns, Flashing & Rebuilds

Look up at your chimney the next time you are in the Mokena driveway. It is the one piece of masonry on your house with weather on every side and no roof of its own — sun, wind-driven rain, and Will County's winter freeze-thaw all hit it at once. That is exactly why the chimney is almost always the first masonry on a home to fail, and why a small crown crack this year can turn into a rebuild in a few.

Paul Lally's Masonry provides chimney repair in Mokena, IL — from tuckpointing failed joints and sealing cracked crowns to correcting flashing and rebuilding brick above the roofline. We are family-owned and have served Chicagoland since 1988. For a free on-site estimate, call (708) 448-8866.

Repair or rebuild? Start with an honest inspection

Not every tired chimney needs to come down. The right fix depends on what is actually failing, and an honest inspection sorts it out:

• Mortar failing, brick sound → tuckpointing. We grind the joints to depth and repoint with matched mortar.
• Crown cracked, brick sound → crown repair or replacement, often with fresh joints below it.
• Brick spalling, leaning, or loose above the roofline → partial or full rebuild of that section.
• Water inside, no obvious brick damage → usually flashing or crown, sometimes both.

We do not rebuild what can be repointed. If your Mokena chimney only needs its joints renewed, that is what we will tell you — the family name is on the estimate.

The four things that fail on a Mokena chimney

1. The crown

The crown is the sloped cap at the very top that throws water off the stack. Freeze-thaw cracks it, and once it cracks, water pours straight down into the chimney and the wall below. Sealing or replacing a failed crown is one of the highest-value repairs on the whole structure.

2. The mortar joints

The exposed stack takes more weather than any wall on the house, so its joints erode first. Open joints let water into the brick — and then the freeze-thaw cycle takes over.

3. The flashing

Flashing is the metal-to-masonry seal where the chimney passes through the roof. When it fails, water runs down the chimney base and into the framing. It is one of the most common leak points we find on Mokena homes.

4. The brick above the roofline

This is the most exposed brick on the house. Once it spalls or the stack starts to lean, that section usually needs to be rebuilt with matched brick and mortar.

Why Will County weather is so hard on chimneys

Here is the freeze-thaw chain that drives most chimney damage:

1. A cracked crown or an open joint lets water into the masonry.
2. Overnight the water freezes and expands roughly nine percent.
3. The expansion pushes brick and mortar apart from the inside.
4. It thaws, more water enters, and the cycle repeats — often several times a week in a Chicagoland winter.

A chimney gets this treatment on all four faces and the top, which is why it ages faster than the walls below it. Catching a cracked crown or open joint early is the difference between a modest repair and a full rebuild.

How we repair a chimney

1. Inspect the crown, joints, flashing, and brick from top to base and identify every water path.
2. Tuckpoint failed joints — ground to depth, repointed with matched mortar and profile.
3. Repair or replace the crown so the top of the stack sheds water again.
4. Correct the flashing at the roofline so the metal-to-masonry transition is sealed.
5. Rebuild any spalled or leaning brick above the roofline with matched units.
6. Clean down and, where appropriate, recommend sealing to slow future water uptake.

Materials that match your home

On a rebuild we match brick size, color, and texture as closely as we can, and we use the correct mortar strength — usually a softer, lime-rich Type N on older Mokena brick and a harder Type S only where conditions call for it. Match the mortar to the brick and the rebuilt section blends in; mismatch it and the new brick spalls.

What drives the cost of chimney repair in Mokena

We never quote a chimney sight unseen. The factors that move an estimate:

• Scope — a crown seal versus full tuckpointing versus a rebuild above the roofline.
• Height and roof pitch — a tall stack on a steep roof needs more staging and setup.
• Access — trees, landscaping, and roof layout affect how we reach the work safely.
• Brick condition — spalled brick that must be replaced adds to the scope.
• Flashing and crown — whether those need attention alongside the mortar.

We explain each of these on-site, and the estimate is free. For the number on your chimney, call (708) 448-8866.

Related masonry work and nearby towns

A chimney repair often connects to the rest of your masonry. If the joints on the walls are going the same way as the stack, see our tuckpointing work; the full scope of crown, cap, flashing, and rebuild work lives on our chimney repair and rebuilds page. Weighing the same repair nearby? See our chimney repair in New Lenox.

Paul Lally's Masonry is a family-owned, licensed and insured masonry contractor serving Chicago and the Chicagoland suburbs since 1988 — tuckpointing, brick repair and replacement, chimney repair and rebuilds, lintel replacement, masonry restoration, and waterproofing for residential and commercial properties. Built on Craftsmanship. Backed by Experience. Free on-site estimates — call (708) 448-8866.

Why Mokena homeowners call Paul Lally's Masonry

Since 1988 we have repaired and rebuilt Chicagoland chimneys, and we do not oversell. We inspect the whole structure, show you what is failing and why, and recommend the smallest fix that actually solves the problem. When a rebuild is genuinely needed, we match the brick and mortar so the work looks like it was always there. Built on Craftsmanship. Backed by Experience.

If your Mokena chimney is leaking, crumbling, or leaning, request a free on-site estimate or call (708) 448-8866 before the next freeze makes it worse.