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.
Before
After
Before
After
Before
AfterHeatShield Chimney Liner & Rebuild in Danbury: What to Know First
We provide independent HeatShield chimney liner and rebuild service throughout Danbury and Fairfield County, with most inspections scheduled within a few days and liner replacement or rebuild work typically completed in a single visit. Our Level-2 camera inspection runs $289, and we’ll show you exactly what we’re seeing before any repair is proposed. HeatShield systems are solid products when installed correctly, but we’ve found that the Cerfractory Foam lining in older CC-100 series installations around Danbury’s Clapboard Ridge and Shelter Rock neighborhoods often develops thermal shock cracking after fifteen to twenty winters of freeze-thaw cycling through the Candlewood Lake microclimate. If you’re seeing bits of orange ceramic in your firebox, smelling smoke in upstairs rooms, or your sweep keeps flagging “suspect liner condition” without specifics, this page is for you. Call (475) 375-9457 and a live person will pick up, any hour.
How HeatShield Products Fail - and How We Fix Them
- CC-100 Cerfractory Foam liner: thermal shock cracking in the smoke chamber. The original CC-100 foam application can develop hairline fractures where the flue transitions through the smoke chamber, especially in Danbury homes built during the 1970s oil-to-gas conversion boom. Cold air drops down the flue, the foam expands and contracts at a different rate than the surrounding brick, and the surface crazes. We pull a camera to map the crack pattern. If the steel substrate beneath is sound, we can apply HeatShield’s factory-compatible repair mixture; if the steel is corroded, we recommend a full stainless liner from DuraFlex or Gelco.
- CC-200 ProLiner: joint separation at the flue collar. The ProLiner’s two-piece collar system can work loose where the upper and lower sections meet, particularly if the original installer didn’t use the factory torque spec on the band clamp. We’ve seen this in three homes along Long Ridge Road where the collar sits in a narrow chase that heats unevenly. Our fix is straightforward: disassemble, inspect the mating surfaces for pitting, reseat with fresh high-temp gasket, and torque to spec. We document the before and after with photos you can see.
- CC-100 foam slumping in oversized flues. When the original mason left a 13×13 flue in a house that only needs an 8-inch round liner, the foam thickness varies and the thick sections can slump before full cure. We find this most often in Danbury’s converted summer cottages near Lake Waubeeka. The repair is removal of the failed foam and installation of a correctly sized flexible liner, usually DuraFlex Pro, with proper insulation pack to maintain flue temperature.
- CC-200 ProLiner: creosote bridging in the corrugated section. The ProLiner’s corrugated flex section gives it flexibility for offset chimneys, but the ridges can collect glazed creosote if the homeowner burns unseasoned oak or runs the stove too cool. Danbury’s hardwood supply is plentiful and cheap, which means we see more of this than crews down in Westchester. We rotary-clean with polypropylene whips, never steel on a HeatShield liner, then camera-verify the bore is clean and round.
- Factory termination cap corrosion. HeatShield’s original galvanized caps from the 1990s and early 2000s have reached end of life in many Danbury homes. The cap rusts through, water enters the annular space, and the liner exterior corrodes from the outside in. We replace with a Gelco or Famco stainless cap with proper storm collar and sealant, sized to the liner OD, not the flue tile ID. It’s a detail that matters.
Our HeatShield Chimney Liner & Rebuild Process
- 1
Call and schedule. A live person answers, 24 hours a day. We’ll ask what you’re seeing, what you’ve been told, and when you’re available. No automated queue.
- 2
Level-2 camera inspection. Russell or one of our background-checked, uniformed technicians arrives with a digital borescope. We photograph every foot of the flue, the smoke chamber, the damper assembly, and the exterior crown. You get the photos and a plain-English verdict before any work is discussed.
- 3
Parts decision: OEM HeatShield, compatible aftermarket, or alternate brand. If the repair is within HeatShield’s original design envelope, we’ll source factory-compatible materials. If the system has failed beyond economical repair, we quote DuraFlex or Gelco stainless liners with equal honesty. No brand is pushed for commission.
- 4
The repair or rebuild. Most liner replacements and partial rebuilds finish in one day. Full chimney rebuilds in Danbury’s historic districts may need two days for proper mortar cure between lifts. We protect your floors, work methodically, and clean up after.
- 5
Post-repair testing. We run a smoke test or draft gauge verification, depending on the appliance connected. The flue must draw correctly under real conditions, not just look right on camera.
- 6
Documentation and guarantee. You receive photos of the completed work, a written summary, and our 90-Day Done Right Promise in writing. If it’s not right, we make it right. No arguing, no paperwork chase.
What HeatShield Chimney Liner & Rebuild Costs in Danbury
These are real numbers for Fairfield County, based on jobs we’ve completed in Danbury over the past three seasons. Your exact price depends on flue length, access difficulty, and whether the original installation documentation is available.
- CC-100 foam repair (localized, substrate sound): $1,200-$1,800
- CC-200 ProLiner collar reseat and gasket replacement: $800-$1,400
- Partial stainless liner replacement (DuraFlex or Gelco, single flue): $2,400-$3,800
- Full stainless liner with insulation pack: $3,200-$5,500
- Partial chimney rebuild (crown to roofline, liner preserved): $4,500-$7,000
- Full chimney rebuild with new liner: $8,500-$14,000
Factors that move the price: chase height above roofline, need for scaffolding versus ladder access, presence of an active gas appliance that must be disconnected and reconnected by a licensed fitter, and whether we find hidden water damage once the old liner is out. We quote upfront, in writing, before work begins. The number on the estimate is the number on the invoice. Call (475) 375-9457 for a free estimate.
Why Danbury Homeowners Call Hearthstone Chimney Co. for HeatShield Work
We’ve been answering the phone with a live person for over 42 years, and we plan to be in Danbury for thirty more. That changes how we approach a job. Our 90-Day Done Right Promise is backed in writing, not mentioned once and forgotten. Russell Haines and our technicians know HeatShield products from hands-on work, not from a distributor seminar. When a liner fails, we can pivot to DuraFlex or Gelco with equal competence, no brand loyalty that serves the supplier instead of the homeowner. Every inspection ends with photos you can see and a plain-English verdict. Background-checked, uniformed technicians. Most jobs in a single visit. A square deal: no surprises on the bill. Tell me what you’re seeing, and I’ll tell you what it actually means.
FAQs
Original HeatShield warranties were typically 20 years for the CC-100 and 15 years for the CC-200, but coverage requires documentation of original installation by a certified technician and proof of annual inspection. As an independent HeatShield service provider, we cannot extend factory warranty, but our repairs use factory-compatible methods and materials that do not void existing coverage where it still applies. Call (475) 375-9457 and we’ll review your paperwork with you.
HeatShield’s CC-100 Cerfractory Foam mixture and CC-200 ProLiner components remain available through wholesale distributors, though some collar sizes for discontinued liner diameters require fabrication lead time. We stock common repair materials and maintain relationships with multiple suppliers so we’re not waiting on a single source. If your system is obsolete, we quote a DuraFlex or Gelco replacement with full transparency about why.
The camera tells the story. Localized cracking or minor joint separation often repairs well. Widespread delamination, exposed substrate corrosion, or liner sections that have shifted out of alignment mean replacement is the sounder long-term choice. We show you the footage, explain the failure mode in plain English, and recommend what we’d do in our own home. No work is proposed without camera evidence you can see for yourself.
Inspections typically schedule within two to five days during shoulder season, one to two weeks during peak fall burning season. Repair work requiring parts orders may add three to five business days. We do not promise same-day dispatch, but we do answer the phone 24 hours a day and keep a waiting list for cancellations. Call (475) 375-9457 to check current availability.
A compromised liner allows combustion gases, including carbon monoxide, to leak into wall cavities and living spaces. It also permits creosote to accumulate in the chimney’s original masonry, creating a fire hazard in the structure itself. The risk is real and specific, not theoretical. That said, if our inspection shows minor cracking that we can monitor, we’ll say so plainly and schedule a follow-up. Nothing is sold on fear. Call (475) 375-9457 for an exact quote - estimates are free.
Written by Russell Haines, Owner, Hearthstone Chimney Co. at Hearthstone Chimney Co., serving Danbury and nearby areas.