HeatShield Chimney Liner & Rebuild Nationwide

HeatShield Chimney Liner & Rebuild in Yonkers: What to Know First

HeatShield chimney liner repair and rebuild in Yonkers runs between $1,800 and $6,400 depending on whether you’re patching a section, resurfacing the full flue, or rebuilding from the smoke chamber up. We’re an independent HeatShield service provider, not a factory-authorized shop, which means we make parts and repair decisions based on what the camera shows us, not what a manufacturer’s warranty department would prefer. Most HeatShield jobs in Yonkers take one full day, and you get a written price before anything starts.

Call (551) 212-3526

This page is for homeowners who already own a HeatShield liner or are weighing HeatShield against a stainless steel replacement. If your liner is showing cracks, peeling, or spalling, or if a previous sweep told you the HeatShield coating is failing, call (551) 212-3526. We’ll schedule a camera-scan inspection and give you the straight answer with photos to prove it.

How HeatShield Products Fail - and How We Fix Them

HeatShield is a ceramic-cement resurfacing system, not a structural liner. It bonds to the inside of an existing clay tile flue and seals gaps. It does its job well in the right conditions. But we see the same failure patterns across Yonkers chimneys, and they’re almost always traceable to one of three causes: moisture intrusion, improper original application, or a chimney fire that cracked the substrate beneath the coating. Here’s what we find most often:

• HeatShield Joint Repair System failures at tile joints. The Joint Repair System (JRS) is a high-temperature sealant applied to the mortar joints between clay tiles. In older Yonkers homes, we see JRS material delaminating because the original clay tile joints were already shifting. Seasonal freeze-thaw cycles along the Hudson River put constant stress on masonry. When a joint shifts even an eighth of an inch after the JRS cures, the sealant cracks and the gap reopens. Our fix is removing the failed JRS section, cleaning back to solid tile, and deciding honestly whether a reapplication will hold or whether the flue needs a stainless liner instead. The camera shows us which one is true.
• HeatShield Cerfractory flue sealant peeling over old spalled tiles. HeatShield’s Cerfractory material is applied as a sprayed-on coating over deteriorated clay tile. If the tile underneath was already spalling when the coating went on, the bond is only as good as the flaking surface it stuck to. We find sections where the coating looks intact from below but has separated from the tile behind it, creating a hidden void. Moisture collects in the void, then freezes, and the coating debonds in sheets. When we find this, the repair is not another coat. It’s removing the loose material and either installing a properly sized stainless liner or doing a partial rebuild of the flue section.
• Smoke chamber parging failures after HeatShield application. HeatShield also sells a smoke chamber parging material. The smoke chamber is the area above the firebox that funnels smoke into the flue. In Yonkers fireplaces built before the 1980s, we frequently see corbeled brick smoke chambers with missing mortar joints. If HeatShield parging was applied over a smoke chamber without proper surface prep, it cracks within a season or two. Smoke leaks through the cracks into wall cavities. This is dangerous and it’s often silent until the camera finds it. Our repair involves removing the failed parging, rebuilding the smoke chamber surface, and sometimes installing a stainless chamber liner sized to the flue above.
• HeatShield resurfacing over old, oversized flues is not a substitute for sizing. HeatShield can resurface a flue, but it cannot change the flue’s internal dimensions. We inspect Yonkers homes where an oil-to-gas conversion left an 8×13 clay tile flue venting a new gas furnace that needs a much smaller cross-section. The HeatShield coating made the surface smooth, but the flue is still oversized, which means condensation and draft problems. The fix in this scenario is not more HeatShield. It’s a properly sized stainless liner, often with insulation, routed through the existing flue. We’ll show you the draft calculation and the condensation evidence on camera before recommending this.
• HeatShield on exterior chimneys with water-damaged crowns. This is the one we see constantly in Yonkers’s older housing stock. HeatShield seals the flue interior, but it does nothing for a cracked crown or missing cap. Water pours down the outside of the flue tiles, saturates the masonry, and eventually works behind the HeatShield coating from the outside in. The coating fails because the chimney was never made watertight. Our repair always starts with the crown and cap. If the crown is shot, we rebuild it before touching the flue. Sealing the inside of a leaky chimney is throwing money at the symptom.

Our HeatShield Chimney Liner & Rebuild Process

A HeatShield repair or rebuild in a Yonkers home follows the same discipline as every other job we run. The camera comes out before any work is discussed. Here’s the sequence:

1. 1
   Camera-scan inspection, full-length. We run a Level 2 camera down the flue and through the smoke chamber. You see the footage in real time. We note every crack, void, separation, and moisture stain on a written inspection record. This is Clause 4 of the Haven Standard, continuous since 2009.
2. 2
   Written scope and price before any work starts. You get a document that states exactly what we will do, which materials we will use, what the final condition will be, and what it costs. No verbal estimate, no “we’ll see once we get in there.” If the scope changes mid-job, the price is re-written and approved before we proceed. That’s Clause 1 of the Haven Standard.
3. 3
   Parts and material decision, in writing. On a HeatShield job, we assess whether the existing HeatShield material can be section-repaired with compatible products or whether the right move is a stainless liner from DuraFlex or a rebuild with new clay tile. We use HeatShield products where OEM material is the correct and warranty-consistent choice. We use DuraFlex or Gelco when the repair would be stronger and longer-lasting with stainless. We explain the trade-off in plain terms and let the camera evidence make the case.
4. 4
   The repair or rebuild. HeatShield section repairs involve removing all loose or debonded coating, prepping the surface, and applying the appropriate HeatShield product per the manufacturer’s spec. Full rebuilds mean tearing out the failed flue tiles and rebuilding with proper materials, then addressing the smoke chamber and crown at the same time. There’s no point rebuilding a flue above a deteriorating smoke chamber.
5. 5
   Post-repair camera scan and pressure check. After the work is done, the camera goes back down. You see the before and after. We also check draft with a smoke test where the repair type calls for it. If it doesn’t pass, we don’t call it done.
6. 6
   Documented photo record and written warranty. You walk away with the inspection record, the pre-repair scan, the post-repair scan, the written warranty for the work, and the written price you agreed to. Everything is on paper. The camera doesn’t lie, and neither does the quote.

Before

After

What HeatShield Chimney Liner & Rebuild Costs in Yonkers

Here’s what HeatShield-related chimney liner and rebuild work actually costs in Yonkers, based on the jobs we’ve priced in this market. These are the numbers we put on paper before work starts:

• HeatShield section repair, 5 to 10 linear feet: $1,800 to $2,900, depending on access and the extent of failed coating removal.
• Full HeatShield resurfacing of a one-story flue: $2,400 to $3,800, including prep, application, and post-scan.
• HeatShield removal and DuraFlex stainless liner installation: $2,900 to $4,600, including insulation and top-plate termination where required.
• Partial chimney rebuild (above the roofline, including new crown): $3,500 to $5,200, using new clay tile and a poured crown with proper overhang and drip edge.
• Full chimney rebuild from the smoke chamber up: $5,000 to $6,400, including flue tile, smoke chamber parging, crown, and cap.

What moves the price: roof pitch and staging access on Yonkers’s steeper roof lines, whether the flue runs interior or exterior, how much of the old HeatShield coating has to be mechanically removed before new material can bond, and whether the crown and cap need to be done at the same time. We’ll bring the camera, tell you what you need, and write the number down. Call (551) 212-3526 for a free estimate.

Why Yonkers Homeowners Call Level Two Chimney Yonkers for HeatShield Work

We’ve inspected and cleaned over 38,000 chimneys since 2009, and every single one got a written price before the work started and a documented photo record when it was done. That’s not marketing language. It’s the operating standard Corrine Halstead set when she started running camera scans on fireplace inspections years before insurers or code enforcement asked for it. If a HeatShield repair doesn’t hold, we make it right under our 365-Day Done Right Promise. You’ll also get a named technician, a text when they’re en route, and a live person on the phone at any hour. We service HeatShield because it’s a legitimate product with specific failure modes, and we know what those look like on camera. We also install DuraFlex and Gelco stainless liners when the smarter repair is a liner swap rather than another coat. Bring us a competitor’s written estimate and we’ll give you a free second opinion.

FAQs