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The Home Depot

Chimney Liner Installation Guide

Pro Referral > Home Guides > Fireplace & Chimney > Chimney Liner Installation Guide
Chimney Liner Installation Guide

A chimney liner is required to ensure the safety of your fireplace and home. It helps reduce the carbon build-up and prevent drafts which can otherwise lead to fires. The chimney liner is installed inside the flue which is the passage that carries smoke out of the chimney. It is an integral part of the chimney system and proper installation is crucial. Professional chimney liner installation is an expensive proposition and can cost anywhere between $2,500 and $5,000.

  1. 1.Proper Specifications

    Chimney liners are installed only after obtaining a building permit. All the regulations regarding the permit need to be fulfilled before you can proceed with the installation. There are specifications about the way in which the liner must be installed as well as the space that must be left between the liner and the chimney.


    When professionals do the installation, they adopt one of different techniques possible with different materials. Chimney liner kits are available in the market with more and more people choosing to install it on their own. This is not a very easy task but can be accomplished by someone with a certain amount of skill in home improvement projects.

  2. The installation has to be done from the top of the chimney. You may not be able to handle this alone and since you will be working on the roof, it is safer to have someone assist you.
  3. 2.Installing a Chimney Liner

    Chimney liners are available in different materials such as steel and aluminum. When purchasing one, you must ensure that you have the largest fitting one for your chimney. Once you have the liner, the first thing you have to do is prepare it for installation by laying it on a flat surface after removing all the packaging. The chimney must also be prepared in advance by clearing it of any obstructions that might be there. You can obtain a chimney brush and do the cleaning or hire a professional chimney sweep to do it for you.


    The installation has to be done from the top of the chimney. You may not be able to handle this alone and since you will be working on the roof, it is safer to have someone assist you. You will need to lower a line down the chimney shaft to install the liner. Using a winch may help you do this faster and put the liner in place slowly without damaging it in any way. Then screw on the plates at the bottom of the liner to keep it in place and to avoid any smoke from getting into the house from the chimney.

  4. 3.Insulating the Liner

    After the installation process is complete, you can insulate it by pouring a mix of vermiculite and cement down the chimney in between the liner and the stone or brick of the chimney. Insulation helps the chimney to heat faster. Another way of insulating the liner is using an insulation blanket which can withstand heat up to 2100º F. This kit consists of insulation, wire mesh, foil tape, glue, and stainless steel locking wire.


    The entire length of the liner must be insulated and for this, you need to first measure the required amount of insulation and cut a piece accordingly. The piece you cut should be slightly longer than the length of the liner for overlap. Then, place the liner in the center of the insulation and wrap the insulation all around it. The edges can be secured with an adhesive. Use a roll of wire mesh to enclose the entire length of the insulated liner to prevent it suffering any damage when it is placed in the chimney flue.

  6. 4.Safety Matters

    Most replacement chimney liners are installed by being pulled up the chimney but there are some that need the liner to be pulled down from below. As when working on any kind of home improvement project, it is essential to wear protective gear such as gloves, goggles, and clothes that cover your whole body. Since chimney liner installation requires you to work on the roof, some extra caution might stand you in good stead and prevent any accidents. Make sure there is someone to help you out in case you encounter any difficulties during the process.


    If there is not anyone to help you out, you may not want to be walking on anyone’s roof if the roof is icy or if it is raining.

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