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Chimney Repair & Masonry in Mokena, IL

Cracked crown, crumbling mortar, a rusted damper, or water in the firebox? We repair the parts of your chimney that keep weather out and hold the structure together — before a small problem becomes a rebuild.

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A masonry chimney takes more abuse than almost any other part of your house. It stands fully exposed to rain, snow, and freeze-thaw cycles all year, and every winter the water that soaks into cracked mortar or a damaged crown freezes, expands, and pries the brick apart a little more. Left alone, a hairline crack becomes a leak, a leak becomes spalling brick, and spalling brick becomes a leaning chimney that costs thousands to rebuild. Catching and fixing the damage early is dramatically cheaper than waiting.

Global Chimney Sweep repairs chimneys across Mokena and the south suburbs, from small mortar and crown fixes to firebox and structural work. We start with an honest look at what is actually failing, show you photos, and quote the repair up front. You will never get pressured into a full rebuild when a targeted repair will do — but if the structure is genuinely unsafe, we will tell you that too.

Repairs We Handle

Tuckpointing

Grinding out failed mortar joints and repacking them with fresh mortar to stop water intrusion and restore strength to the brickwork.

Crown Repair & Rebuild

Sealing or rebuilding the concrete crown at the top of the chimney — the first defense against water getting into the structure.

Firebox Repair

Replacing cracked firebrick and failed refractory mortar so the firebox can safely contain the heat of a fire.

Flashing & Leak Repair

Fixing the seal where the chimney meets the roof, a common source of ceiling stains and interior leaks.

Spalling Brick Replacement

Swapping out brick that has flaked or cracked from water damage before the deterioration spreads.

Waterproofing

Applying a breathable water repellent that keeps rain out while letting trapped moisture escape.

Warning Signs You Should Not Ignore

Call for a repair quote if you see white, chalky staining (efflorescence) on the brick, which means water is moving through the masonry; mortar joints that are recessed, cracked, or missing chunks; pieces of brick or concrete on the roof or in the yard; a damper or firebox that has rusted; water stains on the ceiling or wall near the chimney; or daylight visible through gaps at the top. Any of these is a sign that water is getting where it should not, and water is what destroys chimneys. The sooner it is sealed out, the less you will spend.

How We Approach a Repair

1. Inspect First

We look at the whole chimney, not just the obvious spot, so we fix the cause and not only the symptom. See our inspection service.

2. Show You the Damage

Photos of the actual condition, with a plain explanation of what is failing and why.

3. Quote It Up Front

A clear price for the specific repair before any work begins. No open-ended billing.

4. Repair to Last

Proper materials and technique so the fix holds up to the next round of Chicago winters.

Frequently Asked Questions

How do I know if my chimney needs repair or a full rebuild?
An inspection is the only way to know for sure. Surface issues like failed mortar, a cracked crown, or a few spalled bricks are repairs. A rebuild is only necessary when the structure is leaning, the brick is deteriorating throughout, or the damage is too widespread to patch. We will show you photos and give you the honest answer, not the most expensive one.
What is tuckpointing and why does it matter?
Tuckpointing is the process of grinding out cracked or missing mortar between the bricks and repacking the joints with fresh mortar. Mortar is softer than brick by design and wears out first, and once it fails, water gets into the wall and freeze-thaw damage accelerates. Tuckpointing restores the water seal and the strength of the masonry.
Why is water such a big deal for a chimney?
Because masonry is porous and Chicago-area winters cycle above and below freezing constantly. Water soaks into cracks and mortar, freezes, expands, and physically breaks the material apart. Nearly every major chimney repair traces back to water getting in somewhere. Fixing the entry point and waterproofing is what makes a repair last.
Can you fix a chimney leak that shows up on my ceiling?
Usually, yes. Ceiling stains near a chimney most often come from failed flashing where the chimney meets the roof, a cracked crown, or a missing cap letting rain straight down the flue. We trace the leak to its actual source and repair it, rather than just treating the stain.
What time of year is best for chimney repair?
Late spring through early fall is ideal, because mortar and sealants cure best in mild, dry weather and you want the repair done before winter. That said, we assess damage year-round, and we prioritize active leaks or unsafe conditions whenever they come up.
How long does a typical repair take?
Small jobs like sealing a crown or repointing a few joints can often be done in a day. Larger tuckpointing, firebox rebuilds, or extensive brick replacement take longer and may depend on weather for curing. We give you a realistic timeline with the quote.
Do you waterproof after a repair?
We recommend it on most masonry repairs. A breathable water repellent lets any trapped moisture escape while keeping new rain out, which protects the work we just did and extends the life of the whole chimney. It is a small add-on that pays off over the years.
Will you inspect before quoting a repair?
Yes, always. Repair pricing depends entirely on the actual condition of the chimney, so we inspect first, show you what we find, and then quote the specific work. That way the price is based on reality, not a guess over the phone.

Stop a Small Crack From Becoming a Rebuild

Get your chimney looked at and repaired by a local team that quotes the work up front and fixes the cause, not just the symptom.

📞 Call (708) 500-6096   Book Online

Published July 29, 2026

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