Chimney Repair in St. Louis - You See the Footage Before You Get a Price

Trusted Chimney Repair for St. Louis Homeowners

St. Louis has more masonry chimneys than most cities its size, and that means more of them are quietly cracked, spalling, or missing a cap. Our job is to find those problems before they turn into a chimney fire, water damage in the ceiling below, or carbon monoxide backing into the house. We handle the whole system from cap to firebox, and every repair starts with an inspection you can follow along with. Our technicians have up to 12 years of experience, and they use professional-grade materials from HeatShield, DuraFlex, Gelco, Olympia Chimney, Famco, and Copperfield rather than generic substitutes. Estimates are free, the price is set per job by the written estimate, and nothing gets recommended without photo evidence you can see for yourself. Call (866) 596-7310 to book.

Call (866) 596-7310

Chimney Cap Installation

Chimney Cap Installation is the work of fitting a cover over the top of the flue that keeps rain, animals, and debris out while letting smoke escape. You need one when you have no cap at all, or when the top opening is wide enough for birds, squirrels, and raccoons to nest inside the flue. We size the cap to the actual flue opening, secure it to the crown, and confirm the mesh and spark screen are clear. Most St. Louis homes fall into a typical installation range of $250 to $650 depending on the flue count and whether a custom size is required. A written estimate sets the final price before any work starts.

What a Cap Actually Keeps Out

Water is the bigger enemy than most homeowners expect. A single open flue in a masonry chimney takes in rain all season, which softens mortar joints and rusts dampers from the inside out. A properly fitted cap with a spark screen also keeps embers from landing on a wood shake roof or dry gutter.

Single-Flue and Multi-Flue Fitting

Homes with two flues, one for the fireplace and one for a furnace or water heater, need a cap sized per opening rather than one large cover. We measure each flue and fit them individually so the cap sits level on the crown. That keeps the fit tight and the seal working for years.

Chimney Cap Replacement

Chimney Cap Replacement is called for when an existing cap is rusted through, bent, sitting crooked, or missing its screen. It also comes up after storm damage, when a cap has been pushed loose by wind or a falling limb. We remove the old cap, check the crown and flue tile underneath for damage the cap was hiding, and fit a new cap sized to the opening. A typical replacement in St. Louis runs $200 to $550 depending on cap style, flue count, and how much prep the rooftop work needs. All of it is quoted before we start.

Spotting a Cap That Has Failed

Look up from the yard. A cap sitting at an angle, a screen with holes torn through it, or rust streaks down the crown usually means replacement rather than repair. Water stains on the ceiling near the chimney are another sign, since a failed cap lets rain straight into the flue.

Matching the Cap to the Chimney

A tall masonry stack and a short metal flue draw differently and need different cap styles. We match the cap to the flue type and the roof pitch so it sheds water the way it should. That also cuts down on downdrafts in the winter.

Chimney Liner Installation

Chimney Liner Installation means fitting a new flue lining inside the chimney to replace a cracked, spalling, or missing original liner. It’s needed when the flue no longer contains heat and gases safely, whether that’s a clay tile cracked by a previous fire or a clay flue that was never sized right for a modern appliance. We install DuraFlex flexible liner systems sized to the appliance, and for liners that are cracked but still structurally sound we can resurface with HeatShield instead of relining, which is a repair option many sweep-only companies can’t offer. Typical liner installation in St. Louis runs $2,800 to $6,500 depending on height, flue size, insulation, and appliance type.

When Relining Beats Resurfacing

HeatShield resurfacing works well on a liner that has cracked or flaked but hasn’t separated or shifted. When tiles are offset, missing, or the flue was never sized for a wood stove or high-efficiency appliance, a full DuraFlex reline is the right answer. We explain which one fits your chimney and why.

Insulation and Draft

An insulated liner holds heat inside the flue, which improves draft and reduces creosote buildup in the upper sections. That matters in a St. Louis winter, when a cold exterior masonry stack struggles to warm up. We wrap the liner as part of the installation when the chimney calls for it.

Chimney Flashing Repair

Chimney Flashing Repair addresses the metal and sealant joint where the chimney meets the roof, which is the most common place a roof leaks around a stack. It’s needed when flashing is lifting, rusted, or sealed with tar that has dried and cracked, or when you find water staining on the ceiling near the chimney after a heavy rain. We rework the flashing with proper step and counter flashing, seal it, and check the roof deck around it. Most flashing repairs in St. Louis run $350 to $900 depending on roof pitch and how much of the existing flashing can be reused.

Why Tar Patches Keep Leaking

Tar is a quick fix that fails fast. It shrinks in summer heat, cracks in winter cold, and lets water work in behind it. Proper metal flashing lets the roof and chimney move independently so the joint stays sealed through both seasons.

Flashing Damage After Storms

High wind and hail are the usual culprits behind lifted or dented flashing in the St. Louis area. If a storm has passed through and the flashing looks bent or pulled loose, it’s worth a look before the next rain. A small repair now is cheaper than the drywall work that follows a slow leak.

Chimney Crown Repair

Chimney Crown Repair fixes the concrete cap that covers the top of the masonry stack and sheds water away from the flue. You need it when the crown is cracked, crumbling, or pulling away from the flue tile, which lets water sit inside the masonry and freeze. We chip back the failed concrete, rebuild the crown with the correct slope away from the flue, and seal the joint around the tile. Crown repairs in St. Louis typically run $400 to $1,100 depending on crown size, access, and how much rebuilding is required.

The Slope That Saves the Stack

A crown with no slope holds water right against the flue tile. When that water freezes, it expands and cracks the tile, and the damage moves down. Rebuilding with a proper slope and a sealed edge is what stops the cycle.

Overlay or Full Rebuild

A hairline crack can sometimes be handled with a resurfacing overlay. A crown that has broken into pieces or lost its slope needs to be rebuilt from the base. We tell you which one applies after we’ve seen it up close.

Chimney Repair Companies

Chimney Repair Companies range widely in what they can actually do, and the difference matters most when the repair is structural rather than cosmetic. You need a company that inspects the whole flue system, not one that runs a brush and leaves. Hawk Chimney Sweep handles sweep, inspection, and repair under one roof, so there’s no handoff between a sweep crew and a separate mason, and no gap in who’s accountable for the result. Repair services are quoted per job from a free inspection, with a written estimate at the end so you know the scope before anything is booked.

Questions Worth Asking Any Chimney Contractor

Ask whether they can reline, resurface, and rebuild a crown in-house, or whether they subcontract the structural work. Ask what inspection standard they follow and whether you’ll get photos of what they find. A straight answer on both tells you a lot.

Why One Company Beats a Handoff

When the sweep, the inspector, and the mason are three different businesses, problems slip between them. With one company on the job, the person who found the crack is the person who explains and fixes it. That’s the accountability gap we close.

Chimney Masonry Repair

Chimney Masonry Repair covers the brick, mortar, and stone that make up the stack itself, from repointing joints to rebuilding the top courses. It’s needed when mortar has gone soft and sandy, bricks are spalling or falling out, or the stack is leaning. We repoint with mortar matched to the original brick, replace damaged units, and rebuild the top courses when freeze-thaw has done real damage. Masonry work on a St. Louis chimney typically runs $600 to $3,500 depending on square footage, height, and how many courses need rebuilding.

Freeze-Thaw and St. Louis Winters

St. Louis swings above and below freezing repeatedly through the winter, and that cycle works on masonry joints the way a wedge works on a log. Water gets in, freezes, expands, and pushes the joint apart. Repointing before it spreads protects the brick behind the joint.

Spotting Spalling Brick

Spalling shows up as brick faces flaking off and piling up on the roof or the ground below. It’s a sign moisture is getting into the brick and pushing back out through the face. Left alone, it moves inward and takes the structural brick with it.

Brands We Service

We install and work with HeatShield resurfacing products for cracked and spalling flue liners, and we know how the material sets inside a round, square, or oval flue. Getting the application thickness right is where a HeatShield job succeeds or fails, and we check it before we call it done. We also install DuraFlex flexible liner systems and size them to the appliance and chimney height so draft and clearance both work.

Gelco products come up in our crown and masonry work, where the right sealant and repair material decide how long the fix holds. Olympia Chimney and Famco round out the professional-grade materials we use for caps, liners, and related components, so a repair isn’t undone by a cheap part. Whether you have HeatShield, Gelco, Olympia Chimney, Famco, or any other make, we can help.

Signs You Need a Pro Right Now

• Strong smoky smell or a draft that reverses. A fireplace that smokes into the room instead of drawing up usually means a blockage, a damaged flue, or a chimney that’s out of balance. It’s worth a look before you light another fire.
• Creosote buildup you can see. A thick, glossy layer of creosote on the flue walls is the fuel a chimney fire needs. Regular sweeping keeps it thin, and a heavy buildup is a reason to stop burning until it’s cleared.
• Water stains or a musty smell near the chimney. Staining on the ceiling or wall around the stack points to a flashing, crown, or cap problem letting water in. Small leaks get bigger and rot the framing behind the drywall.
• Cracked or missing flue tiles. Visible cracks in the liner let heat and gases reach the masonry and the wood structure around it. That’s a carbon monoxide concern as much as a fire one.
• Crumbling mortar or loose bricks. Soft, sandy mortar joints and bricks that move when pressed mean the stack is losing its structural strength. A leaning chimney needs attention before wind or a freeze does more.

Our Process, Step by Step

1. 1
   Book the visit. We take the call, note what you’re seeing, and schedule the inspection so we know what to bring. You’ll get a clear arrival window, and the estimate itself is free.
2. 2
   Hawk-eyed inspection, top to bottom. We start at the cap and work down through the crown, flashing, flue, damper, and firebox. We use a camera for the flue interior so nothing gets skipped and nothing gets guessed at.
3. 3
   Show you what we found. You see the photos and the camera footage before we talk about repairs. If something can safely wait, we tell you that plainly instead of pushing work you don’t need.
4. 4
   Written estimate, per job. The estimate breaks out the scope and the price range so you know what’s included. Nothing is booked until you’ve read it and agreed, and the written estimate sets the final price.
5. 5
   Do the work and confirm it. We complete the repair with professional-grade materials and check the result before we leave. When a liner or crown is involved, we confirm it’s sealed and drawing the way it should.

How Much Does Chimney Repair Cost in St. Louis?

Our Service Area Near St. Louis

We serve homeowners across the St. Louis area, including Clayton, University City, Jennings, Webster Groves, Lemay, Affton, Overland, Bellefontaine Neighbors, Ferguson, Crestwood, and St. Ann. Older brick neighborhoods and inner-ring suburbs see the most masonry and crown work, while the outer areas tend to call us for caps and flashing after storms. Response times depend on the day and the route, so we’ll give you a real window when you book. For nearby homeowners, we also handle chimney repair in Clayton and chimney repair in University City.

Frequently Asked Questions About Chimney Repair in St. Louis

Schedule Your Chimney Repair Service in St. Louis Today

If your chimney has a cracked crown, a failing cap, water stains near the stack, or a liner that needs a hard look, get it inspected before the next heating season. Call (866) 596-7310 to book a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. One call covers the sweep, the inspection, and the repair – from cap to firebox, with a written scope before anything is booked.

Written by the team at Hawk Chimney Sweep.