Chimney Repair in Longmont - Inspected on Camera, Then Priced in Writing

Trusted Chimney Repair for Longmont Homeowners

Chimney repair in Longmont fixes the defects that let water in, smoke back, or heat reach places it shouldn’t: cracked crowns, failed flashing, spalling brick, and flue liners that have given out after years of freeze-thaw cycles along the Front Range. If a home inspection flagged your chimney, or you’ve noticed a stain on the ceiling near the flue, we can look at it and tell you plainly what’s wrong and what it takes to fix it. Our technicians have up to 9 years of experience, and we work with named professional-grade materials – DuraFlex, HeatShield, Gelco, Olympia Chimney, Famco, and Copperfield – so you know exactly what’s going into your home. We answer 24/7, and same-day appointments are often possible when you call early. Reach us at (855) 360-7080 for a free estimate.

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Chimney Cap Installation

Chimney Cap Installation puts a fitted cover over the flue opening to keep rain, snow, birds, and squirrels out while still letting smoke escape. You need one when the flue is open to the sky – common on older Longmont homes where the original cap rusted away or was never fitted – because an uncapped flue takes on water with every storm and gives wildlife a way in. We measure the flue, set a correctly sized stainless or galvanized cap, and secure it against the wind gusts that roll off the foothills. The work is straightforward and usually runs as part of a repair visit. Chimney Cap Installation typically costs $150-$450 depending on cap size, material, and the flue configuration, and the written estimate sets the final price. From the first sweep to a full liner repair, we handle the whole flue.

Single-Flue and Multi-Flue Caps

A single-flue cap fits one opening with a screened side band that keeps debris out while smoke vents freely. Multi-flue caps span the whole crown and cover every opening at once, which suits chimneys with two or more flues serving separate appliances.

Stainless Versus Galvanized

Stainless caps hold up far longer in our dry, windy climate and resist rust through snowmelt cycles. Galvanized caps cost less up front but tend to corrode sooner where moisture sits on the metal.

Chimney Cap Replacement

Chimney Cap Replacement is the swap-out of a cap that has rusted through, bent, or lost its mesh, and it’s usually called for when the old cap no longer keeps water and animals out. Once the screen is torn or the top plate is warped, the cap stops doing its job – and a loose cap can rattle or blow off in high wind, leaving the flue wide open. We remove the old unit, check the flue tile underneath for damage, and fit a replacement sized to the opening, generally a stainless model from Famco or a comparable professional-grade line. This is one of the simpler repairs we do, and it often gets handled during the same sweep that found the problem. Chimney Cap Replacement typically costs $200-$500 depending on cap size and material; the written estimate sets the final price.

When a Cap Is Past Saving

Heavy rust, a sagging top plate, or mesh that’s torn in several places means the cap is done. Patching a failing cap rarely lasts through another winter of snow and melt.

Fitting the Replacement Correctly

The new cap has to sit level and be anchored so wind can’t lift it. We check the flue tile and crown at the same time, because a cap that won’t seat properly usually points to damage underneath.

Chimney Liner Installation

Chimney Liner Installation means fitting a new flue liner inside the chimney when the original clay tile is cracked, gaps are showing, or the flue was never lined to begin with. A failed liner lets heat and combustion gases reach the framing and masonry around it, so this is a repair that shouldn’t wait. We install DuraFlex flexible liner systems, the industry standard for relining aged or damaged flues, sized to the appliance and run smoothly through offsets in the chimney. Where the damage is limited, HeatShield liner resurfacing can restore the existing flue without a full reline – a less invasive, cost-effective option we’re authorized to apply. Chimney Liner Installation typically costs $2,500-$6,500 depending on flue length, liner diameter, and whether the chimney needs other repairs at the same time. The written estimate sets the final price.

Choosing Between Relining and Resurfacing

HeatShield works when the liner is intact enough to carry a resurfaced coating and the gaps are moderate. Full relining is the right call when tiles are missing, offset, or badly cracked.

Sizing the Liner to the Appliance

The liner has to match the appliance it serves, or draft suffers and creosote builds faster. We size it to the flue’s actual measurements, not a generic fit.

Chimney Flashing Repair

Chimney Flashing Repair seals the joint where the chimney meets the roof, which is the single most common place water gets into a Longmont home. Flashing is the layered metal and sealant that sheds rain around the chimney base, and it fails when caulk dries out, metal lifts, or the step flashing pulls away from the shingles after years of freeze-thaw movement. We pull back the failed sections, replace the flashing where it’s rusted through, and reseal the joint so water runs off the roof instead of down the masonry. Left alone, a flashing leak rots roof decking and shows up as staining on ceilings well away from the chimney. Chimney Flashing Repair typically costs $400-$1,200 depending on roof pitch and how much flashing needs replacing, and the written estimate sets the final price.

Spotting a Flashing Leak

Water stains on the ceiling or walls near the chimney, damp masonry, or rust streaks on the flue are all clues. The leak often shows up indoors far from where the flashing actually failed.

Why Sealant Alone Rarely Lasts

Caulk over a lifted flashing edge hides the problem for a season or two. Repairing the metal and its layering is what keeps water out through repeated freezes and thaws.

Chimney Crown Repair

Chimney Crown Repair fixes the concrete slab on top of the chimney that sheds water away from the flue, and it matters because a cracked crown lets water soak straight down into the masonry. Crowns crack from settling, from freeze-thaw cycling, and simply from age, and once water gets in, it works through the brick and can freeze inside the chimney wall. We repair cracks and resurface the crown, or rebuild it where the damage is deep, using a mix that bonds to the existing slab and slopes correctly so water runs off. A crown that’s repaired before the masonry is saturated saves far more than the repair costs. Chimney Crown Repair typically costs $350-$1,500 depending on the size of the crown and whether it’s resurfaced or rebuilt. The written estimate sets the final price.

Resurfacing Versus Rebuilding

A resurfaced crown handles hairline cracks and worn surfaces well when the slab underneath is still sound. A rebuild is needed when the crown has broken apart or lost its slope entirely.

Getting the Slope Right

Water only leaves the crown if it’s pitched away from the flue on every side. We check the slope as part of the repair, since a flat crown will keep pooling no matter how well it’s sealed.

Chimney Repair Companies

Chimney Repair Companies vary widely in what they’ll actually take on, and knowing what to look for saves you from paying twice for the same problem. Some sweep only and hand you a list of defects with no way to fix them; others push a full reline before anyone has looked inside the flue with a camera. We do both the sweep and the repair, and we work with a curated roster of professional-grade brands – DuraFlex, HeatShield, Gelco, Olympia Chimney, Famco, and Copperfield – so the materials are named, not mystery parts. Nothing gets recommended without camera evidence you can see for yourself. Chimney Repair Companies in Longmont typically quote repairs between $250 and $6,500 depending on the work, and we set the final price in a written estimate.

What to Ask Before You Hire

Ask which brands they install, whether a camera inspection is included, and for the repair in writing before anyone starts. A clear answer to those three questions tells you a lot.

The Value of One Contractor

When the sweep and the repair come from the same company, a defect found during cleaning gets addressed instead of turned into a second appointment with someone else. That saves time and keeps the record of your chimney in one place.

Chimney Masonry Repair

Chimney Masonry Repair addresses the brick and mortar on the outside of the chimney, where spalling brick, crumbling joints, and open mortar gaps let water in and weaken the structure over time. The freeze-thaw cycle along the Front Range is hard on masonry: water soaks into brick and mortar, freezes overnight, and pushes the surface apart, one winter at a time. We tuckpoint failing joints, replace spalled brick, and apply a breathable water repellent that keeps liquid water out while letting the masonry dry from inside. Repairing masonry early costs far less than rebuilding a chimney whose structure has gone soft. Chimney Masonry Repair typically costs $600-$3,500 depending on the extent of the damage and the height of the chimney. The written estimate sets the final price.

Spalling, Cracks, and Crumbling Joints

Flaking brick faces, cracks running through the mortar, and joints you can dig into with a key all point to water damage. Letting them go lets moisture reach deeper each season.

Why Breathable Sealant Matters

A masonry chimney has to dry from the inside out. A sealant that traps moisture makes spalling worse, so we use a breathable product designed for chimney brick.

Brands We Service

We install and work with DuraFlex flexible liner systems, and we know where they wear at the connection points after years of heating and cooling. We’re also authorized to apply HeatShield liner resurfacing, which restores a flue from the inside without tearing out the original tile.

Our roster includes Gelco, Olympia Chimney, Famco, and Copperfield products, and each has its own quirks in how it fits and how it holds up in our climate. Whether you have one of those brands or any other make, we can help, and we’ll tell you what’s actually in your chimney before recommending a fix. Call (855) 360-7080 for a free estimate.

Signs You Need a Pro Right Now

• Water stains near the chimney. Brown rings on the ceiling or walls point to a flashing or crown leak. Catching it early means repairing metal or concrete instead of replacing rotted framing.
• Crumbling mortar or flaking brick. Spalling brick and joints you can scrape out with a fingernail mean water is already inside the masonry. Tuckpointing now is far cheaper than a rebuild later.
• Smoke backing into the room. Smoke that won’t draw up the flue can signal a blocked or damaged liner. It also means combustion gases may not be leaving the house the way they should.
• A damaged or missing cap. An open flue takes on rain and invites birds and squirrels. A missing cap is an easy fix that prevents a much more expensive one.
• Visible cracks in the flue tile. A cracked liner lets heat reach the framing around the chimney. This is the one defect that shouldn’t be put off, so have it looked at before the next fire.

Our Process, Step by Step

1. 1
   Call and book. We answer 24/7 at (855) 360-7080, and we’ll schedule a visit that works for you. Fast dispatch runs from 7am to 7pm, Sunday through Friday.
2. 2
   Camera inspection. We run a camera down the flue and photograph what we find, inside and out. You see the same images we do, so nothing is recommended on trust alone.
3. 3
   Written findings and estimate. We explain what’s failing, what can safely wait, and what needs fixing now. The estimate is free, and the price is set per job in writing.
4. 4
   The repair. We bring the right materials for the job – HeatShield for liner resurfacing, DuraFlex for relining, or the appropriate flashing, crown, and masonry materials. You know the brands before we start.
5. 5
   Final check and photo report. We verify the repair and document it with photos you keep. If something else turns up, you hear about it in plain terms, not a sales pitch.

How Much Does Chimney Repair Cost in Longmont?

Our Service Area Near Longmont

We work throughout Longmont and the towns around it, including Boulder, Thornton, Westminster, Arvada, Greeley, Estes Park, Berkley, Commerce City, and Fairmount. Response times depend on where you are and how the schedule looks that day; the closer you are to Longmont, the easier it is to fit you in quickly. Book a visit by calling (855) 360-7080 – we answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday.

Frequently Asked Questions About Chimney Repair in Longmont

Schedule Your Chimney Repair Service in Longmont Today

If your chimney has a cracked crown, failed flashing, or a liner that needs attention, we can look at it and give you a straight answer with photos to back it up. Call (855) 360-7080 for a free, no-obligation estimate. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday. Book a chimney sweep or repair visit in Longmont and know exactly what’s going into your home.

Written by the team at Chimney Sweep Longmont.