Liner Install

Professional Chimney Relining Services in Greater Philadelphia & the Poconos

If your chimney liner is cracked, deteriorating, or missing altogether, it’s time to consider a full chimney relining. A damaged flue liner can lead to smoke backup, carbon monoxide exposure, and even chimney fires. At Chimney Scientists, we provide expert chimney relining services across the Greater Philadelphia and Pocono regions, including Philadelphia, Bucks, Montgomery, Chester, Delaware, Carbon, Lehigh, and Monroe counties.

Whether you’re upgrading for safety, efficiency, or code compliance, our certified team delivers reliable chimney flue installation solutions built to last.

What Is Chimney Relining, and When Is It Necessary?

Chimney relining involves removing or bypassing a damaged or outdated liner and installing a new, properly sized flue liner inside your chimney. This service is essential when your existing liner is no longer safe or functional, or when you’re switching fuel types (such as converting to gas).

Your chimney may need to be relined if one or more of the following is true:

  • The clay tile liner is cracked, missing tiles, or deteriorating
  • The flue is unlined or not up to modern building codes
  • You’re installing a new wood stove, gas appliance, or furnace
  • A recent inspection uncovered gaps, corrosion, or fire damage

Unlike a repair, which addresses localized issues, chimney liner replacement restores the full system with new, high-performance materials.

Signs Your Chimney Needs To Be Relined

Not all liner damage is visible to the naked eye. A professional chimney inspection is often the best way to determine whether your chimney requires relining.

Common signs that your chimney needs to be relined include:

  • Smoke entering your home when using the fireplace
  • Poor fireplace draft or frequent odors
  • Bits of tile, rust, or debris in the firebox
  • A history of chimney fires or flue overheating
  • Failed home inspection related to fireplace venting

If your chimney is exhibiting any of these signs, schedule an evaluation right away. In some cases, we may recommend chimney flue repair as a smaller fix, but often, relining is the safest long-term solution.

top view of a chimney flue in need of chimney relining services on a home in Bucks County, PA

Our Chimney Relining Process

Our chimney relining service is handled start to finish by CSIA-certified technicians using industry-standard materials and installation techniques. Here’s what to expect:

  1. Initial inspection to assess liner condition, flue size, and compatibility
  2. Old liner removal or preparation of the chimney interior
  3. New liner installation, sized properly to your appliance or fireplace
  4. Insulation and sealing to ensure safe, efficient venting
  5. Final safety check and smoke test to verify performance

We also offer chimney cleaning services before relining to ensure debris doesn’t compromise your new system.

Types of Chimney Liners We Install

As experienced chimney lining installers, we offer a range of flue liner options depending on your chimney structure, heating appliance, and fuel type:

  • Stainless steel liners: Durable, corrosion-resistant, and ideal for wood, gas, or oil appliances, these liners are available in rigid or flexible formats.
  • Aluminum liners: Lightweight and cost-effective, these are typically used for gas appliances with lower heat output.
  • Cast-in-place liners: Poured-in materials form a seamless liner that’s best for flues with irregular shapes or multiple bends.

Each liner type is installed according to NFPA 211 standards and local code requirements for safety and performance.

Benefits of Replacing Your Chimney Liner

A new chimney liner installation offers benefits far beyond safety. Homeowners choose to reline their chimneys to:

  • Meet local code for real estate sales or new appliance hookups
  • Improve fireplace or stove performance and draft
  • Prevent moisture damage, corrosion, and interior brick decay
  • Reduce creosote buildup and lower chimney fire risk
  • Ensure compatibility when converting to a new fuel type

Relining is one of the most important upgrades you can make to your chimney and one that can prevent costly repairs in the future. If your chimney structure also needs attention, we can assist with exterior chimney repair at the same time.

Serving the Greater Philadelphia & Pocono Regions

Chimney Scientists provides expert chimney relining services across southeastern Pennsylvania and the Pocono region. Our service areas include:

  • Philadelphia County
  • Montgomery County
  • Bucks County
  • Chester County
  • Delaware County
  • Monroe County

Whether you’re upgrading a historic chimney or preparing a home for sale, our team brings trusted experience and local insight to every job.

Schedule Your Chimney Relining Estimate Today

Not sure if you need a full chimney relining or just a repair? Our certified technicians will inspect your flue, explain your options, and provide a detailed quote without the upsell. If a full liner replacement is needed, we’ll make the process straightforward and stress-free.

Contact Chimney Scientists today to schedule your chimney liner estimate and get your fireplace or appliance venting safely again.

Frequently Asked Questions About Chimney Relining

What is chimney relining?

Chimney relining involves replacing the existing flue liner with a new one—typically made of stainless steel or another approved material—to restore safe and efficient venting for your fireplace or appliance.

How do I know if my chimney needs to be relined?

You may need relining if your flue liner is cracked, missing tiles, corroded, or unlined altogether. A professional chimney inspection is the best way to determine whether relining is necessary.

What types of chimney liners do you install?

We install stainless steel, aluminum, and cast-in-place liners. The best choice depends on your fuel type, appliance, and chimney structure.

How long does chimney relining take?

Most relining jobs can be completed in one day, though larger or more complex installations may require additional time for preparation and curing.

Can I reline my chimney to convert to gas?

Yes, you can reline a gas chimney, and it is often required when switching from wood to gas, as it ensures proper draft and prevents moisture-related damage from gas combustion byproducts.

What’s the difference between chimney repair and relining?

Chimney repair typically involves fixing localized damage, such as sealing gaps or patching mortar. Relining is a full-system upgrade that replaces the entire flue liner for long-term safety and code compliance.

No Guesswork,
Just Chimney Science.

5-Star Results
Backed by Science

beachboy
20:29 08 Oct 25
Fantastic job! We had an old wood burning fireplace converted to gas with a gas stove insert. It’s a one stop shop they did absolutely everything ran new gas line installed electric new stove and stainless chimney liner. Quick clean and efficient and everyone was nice.
Susan T.
16:38 03 Oct 25
We didn't know what was wrong with our chimney, but could see moisture was damaging the plaster in the ceiling around it. We consulted a roofer who said the issue was the flashing (on the roof just above the room where damage was visible). New flashing had absolutely no effect. Talked to another roofer who admitted he was stumped and recommended a company called "Chimney Scientists". Best recommendation EVER. The Chimney Scientist inspector recognized the problem immediately: unfortunate repairs in the 1980s to this chimney built in 1900 used a modern type of mortar (Portand cement) that trapped moisture inside our chimney, forcing water out through brick (and then into surrounding ceiling plaster). This past week Chimney Scientists rebuilt our chimney in the top floor of our house and up through the roof using historic lime-based mortar. They found reclaimed brick that closely matches our original brick for the exposed chimney inside the house. Above the roof, they used new brick that will resist the elements for a long, long time. End result: a gorgeous, healthy chimney inside and out. During the job, they provided thorough protection around their work area. At the end of the job, they cleaned up to perfection. All along the way, they cheerfully provided crystal clear and detailed explanations. Maybe best of all: they LISTEN. Whenever we had any concerns or questions, we were heard and any needed adjustments were made right away. The name Chimney Scientists isn't just great branding: these guys really DO understand the science behind chimneys and they take great pride in skillfully solving chimney problems. 10 stars out of 5.
Eric G.
14:44 03 Oct 25
Chimney Scientists do a great job. Antonio is a great service person—super friendly and professional.
Robert G.
19:09 02 Oct 25
Professional, personable service.
Nadine K.
15:59 25 Sep 25
We have used Chimney Scientists several times for chimney inspections, cleaning, and masonry repair and weather proofing. They have always been professional and have done an excellent job.
Kylie K.
19:17 16 Sep 25
Antonio is so great! A wonderful and kind human who is always smiling. His work is fantastic!
Jerry T.
20:33 15 Sep 25
Mark was a nice guy. He cleaned and inspected the unit thoroughly.