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Enjoy A Highly Insulated, Strong Chimney & Optimal Fireplace Performance With A Cast In Place Flue Liner

Cast in place liners are another relining option we’re proud to offer our customers in Grand Junction and the surrounding communities.

Cast in place liners are liners that are made inside of the chimney. They’re made of a cement type mixture that’s poured down into the flue to create one continuous, single piece flue liner. While they’re not the least expensive relining option, they are long-lasting and highly effective. Keep reading to learn more about installation and the many benefits of a cast in place liner.


One reason why cast in place liners are more expensive than other options is that installation is labor intensive. There are a couple of different installation methods used, but here’s the gist of each:

Form Installation

Some are installed with the use of a form. The form is inserted inside of the chimney and inflated to the size necessary for creating the appropriately sized flue. Once it’s secured into place and a barrier is in place at the bottom of the chimney, a cement type mixture is poured into the area between the form and the chimney itself. Once the cast in place liner cures, the form is removed.

This method of flue lining can be used to create multiple flues within the same chimney, as more forms are simply used to do so.

Vibration Installation

Another method of installing cast in place liners is with the power of vibration. A vibrating bell shaped tool is placed at the bottom of the chimney, the cement type mixture is poured down in, and the vibrating tool is winched upwards through the chimney. This vibrating tool ensures that every little crack, gap, or void is filled, and the resulting flue liner is smooth and sealed.

Regardless of which method we use, if there is already a clay tile liner in place, we will need to remove that one before continuing with the cast in place liner installation.

What Are The Benefits Of A Cast In Place Liner?

  • They’re highly insulating and capable of preventing heat transfer and gas leaks.
  • They keep the flue warmer for better draft, better fireplace performance, and less creosote buildup.
  • They’re approved for use in both new and existing chimneys.
  • They actually strengthen the chimney.
  • Manufacturers offer a lifetime warranty.
  • These can be used to reline flues of all sizes and shapes.
  • They’re approved for use with all fuel types, including wood, oil, and gas.
  • They can be used to line multiple flues in the same chimney.
  • They’re regarded as the best option for relining historic fireplace flues.
  • They can be great with high efficiency oil and gas furnaces/boilers because they don’t have the condensation and acid attack issues that other liners may experience with these appliances.
  • They’re made of natural materials that don’t pose a health risk to those in the home.
  • They don’t require the clearance to combustibles that other liners do.
  • They’re heat resistant and can handle temperatures upwards of 2100 degrees F.
  • They seal and fill every last gap or crack in the chimney.
  • They’re joint and seam free.

                     chimney top being repairedinside chimney flue

If you’d like to learn more about cast-in-place liners or you’d like to discuss your relining needs with a chimney professional, please call us or reach out to us here on our website. We’re happy to help!

2944 I-70 Business Loop #210

Grand Junction, CO 81504

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