Chimney Liners

Stainless steel and cast-in-place chimney liner installation — restoring your flue's safety barrier and bringing unlined or damaged chimneys up to modern code

$1,500 - $5,000+ 4 - 8 hours CSIA Certified

Call (888) 737-0903 Get Free Estimate

Chimney Liners service by Shamrock Chimney

About Our Chimney Liner Service

Your chimney liner is the most critical safety component in your chimney system — the barrier between superheated combustion gases (exceeding 1,000°F during normal operation) and your home's combustible wood framing. When this barrier is cracked, missing, or deteriorated, your family is at risk from chimney fires and carbon monoxide exposure. Shamrock Chimney installs UL Listed stainless steel and cast-in-place liners that restore this safety barrier and bring your chimney up to modern code standards.

The Right Liner for Your Situation

We don't push the most expensive option — we recommend the liner system that best fits your chimney's condition, configuration, and your heating appliance. Stainless steel liners are excellent for most situations and cost less than cast-in-place. But when structural reinforcement is needed, or when chimney geometry prevents stainless steel installation, cast-in-place is the better solution. We explain the tradeoffs and let you decide.

What Sets Our Liner Installation Apart

Every liner installation begins with video inspection and precise sizing calculations. We don't estimate — we measure your chimney internally, calculate draft requirements based on your appliance specifications, and select the liner diameter that provides optimal performance. An improperly sized liner creates draft problems that are expensive to correct. Our engineering-based approach gets it right the first time.

UL Listed Materials, Proper Insulation

We install only UL Listed liner systems tested to withstand 2,100°F — meaning they survive even chimney fire conditions. Our stainless steel liners use 304 alloy for wood-burning applications and 316 alloy for gas applications where acidic condensation is a factor. Every installation includes proper insulation wrap or pour — maintaining flue temperature for efficient draft and protecting surrounding masonry from heat transfer.

Complete Installation Documentation

Every liner installation is documented with photographs of the existing condition, the installation process, and the completed system. You receive warranty documentation, liner specifications, and a signed certificate of completion. This documentation satisfies building code inspection, insurance requirements, and real estate transaction needs. We keep copies on file for future reference.

The Importance of a Proper Chimney Liner

Without an intact liner, combustion gases — including carbon monoxide, which is odorless and lethal — can seep through cracks and gaps into your home's living spaces. During a chimney fire (which can occur without warning when creosote ignites), temperatures inside the flue exceed 2,000°F. Without a liner rated for these temperatures, heat transfers through masonry to adjacent wood framing, potentially igniting your home's structure. A proper liner prevents both scenarios.

Code Compliance & Insurance Protection

A properly installed, documented chimney liner satisfies building code requirements and provides the documentation insurance companies require. Homes with unlined chimneys or damaged liners may face insurance coverage limitations. Our installation documentation provides proof of code-compliant liner installation that protects your coverage and your property value.

Why Choose Our Chimney Liner Service?

Restores the critical safety barrier between combustion gases and your home's structure

Brings unlined historic chimneys up to modern building code and NFPA 211 standards

Properly sized liners improve draft performance and heating appliance efficiency

Stainless steel liners carry lifetime manufacturer warranties against burnthrough and corrosion

Cast-in-place liners structurally reinforce deteriorating chimneys while creating a smooth flue

UL Listed materials tested to withstand 2,100°F — surviving even chimney fire conditions

Our Liner Installation Process

Video Inspection & Assessment

We perform a Level 2 video camera inspection of your existing flue to document current liner condition, identify damage locations, measure flue dimensions, and determine the best relining approach. We assess whether stainless steel or cast-in-place is most appropriate for your chimney's condition and your heating appliance.

System Design & Sizing

Proper liner sizing is critical for draft performance and safety. We calculate the correct liner diameter based on your appliance type, BTU rating, chimney height, and configuration. An oversized liner won't draft properly; an undersized liner creates dangerous pressure. Our calculations follow NFPA 211 and manufacturer specifications.

Professional Installation

For stainless steel liners, we lower the properly sized flexible or rigid liner through your chimney, connect it to your appliance with an approved connector, and install a top plate with cap. For cast-in-place liners, we pump a specialized morite or cement mixture around an inflatable bladder to create a smooth, seamless flue. Both methods include proper insulation.

Testing & Documentation

After installation, we verify proper draft using a manometer, check all connections for integrity, and confirm the system operates safely. You receive complete documentation including liner specifications, warranty information, and installation photographs. This documentation satisfies code requirements, insurance standards, and real estate transaction needs.

Chimney Liner FAQs

Your chimney needs relining if: the existing clay tile liner is cracked, broken, or has gaps between sections; the chimney has no liner at all (common in homes built before the 1940s); you're converting from one fuel type to another; a chimney fire has damaged the existing liner; or a Level 2 video inspection reveals deterioration. Any of these conditions compromise the safety barrier between combustion gases and your home's combustible framing.

Stainless steel liners are flexible or rigid metal tubes installed inside the existing flue. They're faster to install, less expensive, and excellent for chimneys with straight or slightly offset configurations. Cast-in-place liners involve pumping a cement-like material around a bladder to create a smooth, seamless flue. They're ideal for chimneys with significant offsets, structural deterioration, or where the existing flue needs reinforcement. Both methods provide UL Listed safety performance.

Quality stainless steel liners with lifetime manufacturer warranties are designed to last 50+ years with proper maintenance. Cast-in-place liners can last 50+ years as well. The key is proper sizing, correct installation, and annual maintenance. We use only UL Listed 304 or 316 alloy stainless steel — 316 alloy for gas applications where acidic condensation is a factor. Both liner types far outlast the clay tile liners they replace.

Building codes require that chimneys have an intact, properly sized liner appropriate for the fuel being burned. If your liner is damaged, missing, or improperly sized, your chimney does not meet code — and more importantly, it's not safe to use. Insurance companies may deny claims related to chimney fires if the liner was known to be damaged or absent. Relining brings your chimney into code compliance and ensures safe operation.

No — the chimney must be out of service during liner installation, which typically takes one day for stainless steel and one to two days for cast-in-place. Cast-in-place liners require additional curing time (usually 24-48 hours) before the first fire. We'll give you a clear timeline so you can plan accordingly. Most installations are completed in a single day.

Get Your Liner Estimate

Restore your chimney's safety barrier — schedule your liner assessment today

Call (888) 737-0903 Request Free Estimate

Liner Details

Price Range $1,500 - $5,000+
Installation Time 4 - 8 hours
Certification CSIA Certified
Liner Warranty Lifetime Liner Warranty

Why Trust Us

UL Listed Liner Systems
CSIA Certified Installers
Lifetime Manufacturer Warranty
Veteran Owned & Operated
Precision-Sized for Optimal Draft

Related Services

Why Professional Liner Installation Matters

Your chimney liner is the safety barrier that prevents house fires and carbon monoxide poisoning. When this barrier fails — through cracking, deterioration, or absence — the consequences can be fatal. Professional liner installation using UL Listed materials, proper sizing calculations, and correct installation techniques is essential for your family's safety.

Sizing Science Prevents Draft Problems

Liner sizing is engineering, not guesswork. A liner that's too large for your appliance won't maintain flue gas temperature, causing condensation, poor draft, and accelerated creosote formation. A liner that's too small creates excessive velocity and potential pressure problems. Our CSIA certified technicians calculate the precise diameter using appliance BTU rating, chimney height, and NFPA 211 tables.

Northeast & Midwest Climate Demands Proper Liners

In the Northeast and Midwest, chimneys face freeze-thaw cycling that cracks clay tile liners from within. Water entering through crown or cap failures freezes inside liner joints, expanding and separating tiles. Once gaps form, combustion gases escape into the chimney chase. Professional relining with stainless steel or cast-in-place eliminates tile joint gaps entirely — creating a continuous, sealed flue.

Signs You May Need a New Liner

Video inspection reveals cracked, broken, or separated clay flue tiles
Your home was built before the 1940s and may have no liner at all
You've had a chimney fire — heat likely damaged the existing liner
White staining inside the flue indicates water penetration through liner gaps
Carbon monoxide detector alerts near the chimney — possible gas leakage through liner
You're switching fuel types — wood to gas or gas to wood requires proper liner sizing
Pieces of clay tile are falling into the firebox — liner is actively deteriorating

The Shamrock Liner Installation Difference

UL Listed materials, precision sizing, and lifetime warranty — your safety barrier done right

Precision Engineering

We calculate liner diameter using appliance specs, chimney dimensions, and NFPA 211 standards. Proper sizing ensures optimal draft, efficient heating, and safe operation — no guesswork, no generic solutions.

UL Listed & 2,100°F Rated

Our liner systems are UL Listed and tested to withstand 2,100°F — surviving even chimney fire conditions. We use 304 alloy for wood and 316 alloy for gas. No compromises on the material protecting your family.

Complete Documentation

Full installation documentation with photographs, specifications, warranty papers, and completion certificate. Satisfies building code, insurance, and real estate requirements.