Review Our Business

What’s a Chimney Liner And Why Do I Need One?

Every chimney should be fitted with a flue liner for best and safest performance. Though chimneys were originally not lined, since the early part of this century, modern fire codes have instructed that all chimneys be lined for safety reasons. Designed to contain the combustion products that your chimney produces and then funnel them outside, chimney liners may be clay or metal. Besides helping move toxic gases out of your home, a chimney liner also protects the wall of your chimney from heat and corrosion. Pozzi Chimney Sweep recommends that you have your chimney professionally inspected to be sure it is equipped with a liner and meets modern safety standards.

The Types of Chimney Liners

  • Clay tile liners. Most masonry chimneys are lined with clay tiles, which are inexpensive and generally satisfactory for open fireplace chimneys that have been properly maintained. However, these ceramic tiles aren’t great at evenly distributing heat when a chimney heats up quickly, as it does when a fire is lit. Uneven heating causes flue tiles to expand, crack, and break. If your chimney has a cracked clay liner, it needs to be repaired before it is used.
  • Metal chimney liners. Pozzi Chimney Sweep, Inc. is proud to be a registered dealer of Ventinox stainless steel chimney liners as well as HomeSaver UltraPro chimney liners. We stand behind these liners, which are primarily used to upgrade and repair existing chimneys, because they are extremely safe and durable. They can withstand high temperatures and corrosive environments that are typical in gas or oil vents. Tested and listed for all-fuel, these liners can be used for wood, gas, or oil-fired equipment.

The Purpose of a Chimney Liner

A lot of people don’t understand why a chimney needs to be lined, particularly because chimneys didn’t used to be lined. The Chimney Safety Institute of America explains why chimney liners are now necessary for a safe chimney: “In the 1940s and again in the 1980s, masonry chimneys were tested by the National Bureau of Standards (NBS) for durability due to rising concerns about their performance and safety. The tests revealed that unlined chimneys were so unsafe that researchers characterized building a chimney without a liner as ‘little less than criminal.’”

Here’s what your chimney liner will do for you:

  • Prevent the combustibles in your fireplace from catching fire. Studies show that unlined chimneys heat up so rapidly that adjacent woodwork can catch fire in less than three and a half hours.
  • Protect your masonry and extend the life of your chimney. Liners protect your chimney’s masonry from being penetrated by the corrosive byproducts of combustion. When acidic flue gases are allowed to enter brick and mortar, it hampers the durability of your chimney, as these gases eat away at the mortar joints. Eroding mortar joints allow heat to transfer more easily and quickly to combustibles, creating an environment ripe for carbon monoxide, which can leak into the home.
  • Ensure efficiency. Liners can help chimneys to function better by creating the correct-sized flue. An incorrectly sized liner can cause excessive creosote buildup and even the production of carbon monoxide. A liner will allow your chimney to operate with optimum efficiency.

Call us at 815-286-9922 or email us at to schedule your chimney relining. Let Pozzi Chimney Sweep put your mind at ease and ensure that your home is heated and vented safely.


Have your chase cover and crown inspected regularly to see if they need repair. Don’t ignore this important chimney service.

We Accept Credit Cards

We Are A Full Service Valor Dealer

Awards & Reviews

Angie's List Award Winner Angie's List Award Winner Angie's List Award Winner

Certifications & Associations

NCSG Member C-Det Certified Hinckley Business Association Sandwich Chamber of Commerce

Follow Us


After having our chimney swept, Gary gave us suggestions for this coming winter. I feel much better now, and we we will have a cozy fireplace with the assurance that we won’t have a chimney fire!
~ Connie