Level 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.
HeatShield Chimney Repair in Denver: What to Know First
We provide independent HeatShield chimney repair in Denver, typically completing most jobs within one to two business days after inspection. A written price and scope are delivered before any work begins - Clause 1 of the Haven Standard - and every repair includes a documented photo record under Clause 4. This page is for Denver homeowners who installed a HeatShield liner, crown, or sealant product and now need repair work done by technicians who understand the material’s behavior in Colorado’s climate. Call (720) 674-7312 for a free estimate with no obligation to book.
How HeatShield Products Fail - and How We Fix Them
- HeatShield Cerfractory Foam liner resurfacing cracks or delaminates. The cerfractory slurry bonds to clay tile but can separate when the underlying tile shifts during Denver’s freeze-thaw cycles, especially in older homes in Capitol Hill or the Victorians along Federal Boulevard. We camera-scan to confirm the bond failure, remove the compromised section, and reapply using the specified trowel thickness and cure protocol - or recommend a stainless liner from DuraFlex or Gelco if the substrate is too far gone.
- HeatShield Joint Repair (HJ) shrinks at vertical seams. The joint-packing material settles slightly over the first two heating seasons, leaving hairline gaps that collect moisture and expand in January cold snaps. We find these with a forward-scan camera, repack with fresh HJ compound to the manufacturer’s specified depth, and document the fill with before-and-after footage.
- HeatShield CrownCoat develops surface pitting on flat crowns. The elastomeric coating protects concrete crowns but degrades faster on south-facing exposures above 5,280 feet where UV is more intense. We grind the pitted surface, assess the concrete beneath, and reapply CrownCoat only when the substrate is sound - otherwise we pour a new crown with proper slope and drip edge.
- HeatShield Smoke Chamber Safe (SCS) flakes in chambers with heavy pyrolysis deposits. SCS is designed to smooth corbelled smoke chambers, but Class III creosote - the hardened, tar-like residue from burning unseasoned wood common in Denver’s wood-stove-heavy neighborhoods - can undermine adhesion. We mechanically clean to NFPA 211 standards, verify surface readiness with a moisture meter, then apply SCS in lifts with proper cure time between coats.
- HeatShield Flue Seal gaps at the thimble connection. The sealant around the thimble entry point hardens and loses flexibility after repeated thermal cycling, particularly in homes that burn daily through Denver’s shoulder seasons. We remove the old sealant, inspect the thimble for corrosion or offset, and reseal with HeatShield-compatible compound or recommend a Gelco thimble replacement if the metal is compromised.
Our HeatShield Chimney Repair Process

- 1
Call and schedule. A live person answers, notes your HeatShield product and symptoms, and books a Level 2 inspection with camera scan.
- 2
Inspection and documentation. Our tech runs a camera down the flue, photographs the failure, and records readings. Corrine Halstead trained at Apex Technical School in Manhattan on combustion venting and liner systems, and her crew applies that same discipline - write down what you find before you say a word about it.
- 3
Written price and scope. You receive a fixed price, written warranty terms, and the repair plan before anyone picks up a tool. No exceptions.
- 4
Parts decision. We source HeatShield materials through Haven’s buying network when OEM is warranted, or specify quality aftermarket from DuraFlex or Gelco when the job calls for it. We explain the trade-off and let you decide.
- 5
Repair and testing. The work is completed to manufacturer spec, then smoke-tested or camera-verified depending on the repair type.
- 6
Photo record and closeout. You get the completed job photos, written warranty, and invoice. The archive goes into our system, running continuously since 2009. The camera doesn’t guess. Neither do we.
Before
AfterWhat HeatShield Chimney Repair Costs in Denver
| Repair Type | Typical Range | What Moves the Price |
|---|---|---|
| Joint Repair (HJ) repacking, single flue | $340 - $580 | Height of chimney, number of joints, access difficulty on steep Denver roofs |
| CrownCoat reapplication | $420 - $760 | Crown square footage, surface prep needed, south-facing UV damage severity |
| Smoke Chamber Safe (SCS) recoat | $680 - $1,120 | Chamber size, creosote removal labor, lift count for proper cure |
| Cerfractory Foam section repair | $890 - $1,540 | Linear feet affected, tile substrate condition, full relining vs. spot repair |
| Thimble reseal or replacement | $280 - $640 | Sealant-only vs. metal replacement, compatibility with existing liner |
These ranges reflect Denver’s labor market and material costs through Haven’s supplier network. We do not charge for the estimate, and we do not start work until you have the written price in hand. Call (720) 674-7312 for an exact quote on your specific HeatShield product and failure.
Why Denver Homeowners Call Level Two Chimney Denver for HeatShield Work

We’ve inspected and cleaned more than 38,000 chimneys since 2009, and a growing share of those are HeatShield installations from the 2015-2020 window when the product saw heavy adoption in Denver’s inner suburbs. Our techs carry the HeatShield application manuals in their tablets, know the difference between HJ and SCS failure signatures, and won’t confuse a CrownCoat job with a pour-new-concrete job.
Every repair is backed by the 365-Day Done Right Promise: if it’s not done right, we make it right. Background-checked, uniformed technicians arrive on schedule with license information displayed, and you get a text when they’re on the way. If your HeatShield system needs a component we don’t stock, our buying relationship with DuraFlex, Gelco, and other suppliers keeps lead times short and prices honest. As an independent HeatShield service provider, we have no manufacturer affiliation - our only obligation is to the condition of your chimney and the written price we agreed to.
FAQs
No, if the repair is performed using HeatShield-specified materials and application methods. We follow the manufacturer’s cure and thickness requirements, document the work with photos, and provide you with a written record that supports any future warranty claim. Call (720) 674-7312 if you need help interpreting your original warranty paperwork.
We source HeatShield OEM materials through Haven’s buying network for repairs where the spec demands it. For some applications - thimble replacements, transition components - we may recommend DuraFlex or Gelco equivalents that meet or exceed the original performance. We explain the difference and the price impact before you decide, in writing.
The camera scan tells us. If the cerfractory bond failure is localized to one or two tiles and the surrounding substrate is sound, spot repair is viable. If we find spalling tile, shifted flue sections, or delamination exceeding roughly 30 percent of the liner length, we recommend a stainless steel liner from DuraFlex or Gelco. We show you the footage and explain the threshold before quoting either option.
Most inspections are scheduled within two to three business days, and repairs requiring no special-order parts are completed within one to two business days after you approve the written price. CrownCoat and HJ repacking jobs are often same-week. SCS and cerfractory repairs needing extended cure time between coats may stretch to three days. We do not promise same-day dispatch, and we do not pressure you to book - Denver’s burning season is long enough to do the job right.
Small gaps in Joint Repair compound or CrownCoat pitting admit moisture that accelerates freeze-thaw damage through Denver’s winter. A compromised smoke chamber or liner can allow creosote to accumulate in wall cavities or reduce draft enough to spill carbon monoxide into living space. The repair cost rarely goes down with waiting, but the hazard assessment is specific to what the camera finds - we do not recommend work you don’t need, and we flag what can safely wait until next season. Call (720) 674-7312 for a free inspection and an honest timeline.
Written by Corrine Halstead, Owner, Level Two Chimney Denver at Level Two Chimney Denver, serving Denver and nearby areas.





Before
After
Before
After
Before
After