Gas fireplace service
Sweep & inspection
Caps & crowns
Flue relining
Masonry repairLevel 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Why Salt Lake City Homeowners Choose HeatShield Chimney Cleaning
Forge Chimney Cleaning provides independent HeatShield chimney cleaning and repair service in Salt Lake City, UT. HeatShield is a cast-in-place refractory resurfacing system for fireboxes and flue liners, not a brand of fireplace, and we evaluate it as one option among several based on what your masonry actually needs. We are an independent service provider. We are not affiliated with, authorized by, or acting as a dealer for HeatShield, and no manufacturer warranty endorsement is implied.

That independence is the point. A cast-in-place resurfacing is the right call on some fireboxes and the wrong one on others, and we tell you which before anyone mixes material. Our technicians have up to 15 years of experience reading fireboxes in Salt Lake City housing stock, from the original masonry fireplaces in the Avenues and Sugar House bungalows to the prefab fireboxes in the bench ranches east and south. Call (833) 497-1153 to book an inspection.
Why Trust Forge Chimney Cleaning for Your HeatShield Chimney Cleaning?
HeatShield products are proprietary castable refractories. They don’t behave like generic refractory cement, and they don’t tolerate short cuts in mixing, curing, or surface prep. We work with them the way the material demands: substrate cleaned back to sound masonry, primed correctly, cast at the right consistency, and cured under conditions that let it harden instead of chalk.
Our familiarity with HeatShield runs through the specific work it does. FireGuard resurfacing on firebox walls, floors, and smoke chambers. TherMix insulating castable for flue relining. Resurfacing compound on cracked firebox walls. Cast-in-place liners for deteriorated masonry flues. We know how each one should look and feel when it’s applied correctly, which is how we spot the delamination, soft surfaces, and bond failures that show up when it isn’t.
Warranty-safe work means a few things here. Existing HeatShield material isn’t removed unnecessarily. Repairs are made to sound substrate, not layered over failure. And if the underlying cause is moisture getting in through the crown, flashing, or cap, we deal with that first, because resurfacing over a wet firebox just puts a new cast layer in line to fail.
Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Common HeatShield Chimney Cleaning Problems We Fix in Salt Lake City
HeatShield failures tend to follow patterns. Each one tells you something about what happened before the material was cast, and each one has a specific fix. Here’s what we see most in Salt Lake City.
- Delamination and shelling. FireGuard resurfacing shells off in flakes or slabs when the firebox substrate wasn’t cleaned back to sound masonry or wasn’t properly primed before casting. The material bonded to soot and loose brick instead of solid brick. Fixing it means removing the loose cast layer, cleaning back to sound substrate, and recasting.
- Cracks returning at firebox joints. A resurfaced firebox that cracks again within a season or two usually had a cause that was never corrected. Water getting in through the crown or flashing is the common one. The cast layer fails at the joints because the masonry underneath is still moving with moisture. The crown or flashing has to be corrected before any recast.
- Soft, chalky surfaces. Improperly mixed or cured TherMix or resurfacing compound leaves a surface that spalls under heat cycling and loses bond at the smoke chamber transition. Too much water in the mix, or curing in a firebox that dried too fast, are the usual culprits. The fix is removing the soft material and recasting properly.
- Material bridging over a firebox that was too far gone. HeatShield cast over missing brick or failed mortar joints will fail because the structure behind it moves. A cast layer can’t substitute for structural masonry. On fireboxes in that condition, brick and mortar rebuilding comes before any resurfacing.
- Cast liners that lost bond in a flue. A cast-in-place flue liner needs a clean, sound flue wall to bond to, and it needs to be sized correctly. Where the liner separates or the flue was too deteriorated, the answer is often a different relining approach rather than recasting over a bad wall.
HeatShield Parts & Our Repair-vs-Replace Approach
HeatShield is a proprietary castable refractory, so there isn’t a real OEM-versus-aftermarket choice the way there is with a mechanical part. The choice that matters is genuine HeatShield product, correctly mixed and cured, versus generic refractory cement that won’t hold up through Salt Lake City winters. We use the real material. We don’t claim to stock or carry genuine HeatShield parts, and we’re not a HeatShield dealer; we source and apply it for the job in front of us.
The repair-versus-replace call is where a lot of money gets spent wrong. Some fireboxes are good candidates for resurfacing with FireGuard, and some aren’t. A firebox with missing brick, failed mortar joints, or a firebrick wall that’s collapsing needs repointing or rebuilding first. Paying for a cast layer over that is paying for a repair that will fail within a few seasons.
We make the call based on what’s underneath, not what’s easiest to sell. If you’re weighing resurfacing against rebuilding, call (833) 497-1153 for a free estimate and an honest read on your firebox.
Our HeatShield Service Process – Step by Step
- 1
Diagnosis and Level 2 inspection. We clean soot and creosote to expose the true condition of the masonry, then inspect the firebox, smoke chamber, flue, crown, and flashing. You see the condition, not just a verbal description of it.
- 2
Repair or install. If the substrate is sound, clean, dry, and primed, we cast the HeatShield product the job calls for. If brick and mortar need rebuilding first, we do that before any cast layer goes on. Water sources get corrected at the same time so the repair holds.
- 3
Test. We check the finished surface for bond, consistency, and correct transition at the smoke chamber, and confirm the flue draws the way it should before the fireplace goes back into service.
- 4
Warranty paperwork. You get the written record of what was done, how it was cast, and what the work is backed by. If HeatShield’s own warranty applies to the product, we’re clear about what that covers and what it doesn’t.
See the difference
Before
After
Before
After
Before
AfterHeatShield Products We Service & Install in Salt Lake City
We work with the full range of HeatShield systems as the job requires. FireGuard is a cast-in-place firebox resurfacing for prefab and masonry fireboxes, restoring the firebrick surfaces that burn directly against the fire. TherMix is an insulating castable liner mix, typically used for flue relining. The resurfacing compound, including the air-set version, repairs cracked firebox walls. The cast-in-place flue liner handles masonry chimneys with deteriorated or unlined flues.
Which of these fits your Salt Lake City chimney depends on the firebox condition, the flue’s integrity, and the cause of failure. We don’t force a product onto a chimney. We match the product to the problem, and we say plainly when resurfacing is the wrong tool and repointing or rebuilding is the right one.
We Also Service These Brands
HeatShield is one tool in a full range. We work with DuraFlex flexible liner systems for relining, Gelco components for the parts that support and seal a chimney system, and other professional-tier brands in the same supply chain. That matters when your chimney needs more than resurfacing. A firebox repair and a flue liner replacement are often the same job, and we can handle both without sending you to a second company.
FAQs – HeatShield Chimney Cleaning Service in Salt Lake City
HeatShield is a cast-in-place refractory resurfacing system, not a fireplace brand. It’s applied to the inside surfaces of a firebox or flue to rebuild the refractory surface without replacing the masonry. It works when the substrate is sound and the application is done correctly. Call (833) 497-1153 with questions about your firebox.
No. FireGuard can be applied when the firebox substrate is sound, clean, dry, and structurally stable. If there’s missing brick, failed mortar joints, or a firebrick wall that’s collapsing, the firebox needs repointing or rebuilding first. Casting over a firebox that’s too far gone just puts a new layer in line to fail. Call (833) 497-1153 for a free estimate and we’ll tell you which your firebox needs.
Cracks reappearing after resurfacing usually mean the underlying cause was never corrected, and water getting in through the crown or flashing is the common one. Salt Lake Valley conditions make this worse: winter temperature swings and freeze-thaw on the firebox and crown work moisture into the masonry, and the cast layer fails at the joints where the structure underneath is still moving. The fix is correcting the moisture source before any recast. Call (833) 497-1153 to have the firebox and crown inspected.
No. A resurfaced firebox still needs regular sweeping, and here in Salt Lake City the burning season is compressed into cold months when the valley inversion has the air quality board restricting wood burning. Creosote builds up during the allowed burn days, and on red-air days the stove sits idle. An annual sweep and inspection keeps the fireplace safe and legally burnable through the season. Call (833) 497-1153 to schedule a sweep.
We are an independent HeatShield service provider, not a HeatShield dealer, so we don’t extend or endorse the manufacturer’s warranty. If HeatShield’s own product warranty applies, we’ll be clear about what it covers. Our work is backed by our own trade-grade standards for material, mixing, and curing. Call (833) 497-1153 to talk through what applies to your job.
HeatShield service in Salt Lake City is priced per job by a free written estimate, and the estimate sets the final price. A standard sweep and inspection costs less than a firebox resurfacing, which in turn costs less than a rebuild, because the scope is different. Nothing is recommended without a camera inspection and photo report you can see for yourself, and we say plainly when work can safely wait. Call (833) 497-1153 for an exact quote. Estimates are free.
Book Your HeatShield Service in Salt Lake City, UT
If your firebox is cracking, spalling, or showing a HeatShield surface that’s failing, we’ll inspect it, show you what’s happening, and tell you honestly whether resurfacing, repointing, or a rebuild is the right call. Call (833) 497-1153 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by the team at Forge Chimney Cleaning.