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Homemade Chimney Liner

Chimney liners provide a safe channel for fire exhaust. A homemade chimney liner might be installed where the fabric of the chimney has been compromised by age, or it could be part of a building regulation requirement when fire exhausts must pass through interior walls or ceilings.



The installation of a chimney liner can extend the useful life of the chimney, insulating the interior from further damage caused by soot and heat. A liner will also make the chimney safer by channeling smoke and soot efficiently.

Things You'll Need

  • Stainless steel flexible chimney liner hose
  • Face mask
  • Goggles
  • Protective gloves
  • Wire mesh
  • Insulating material such as blanket wrap
  • Bottom termination connector
  • Foil tape
  • Ladder
  • Safety harness
  • Hose clamps
  • Finishing cap
  • Silicone caulk
  • Industrial measure
  • Saw or heavy metal snips
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Instructions

  1. Preparation

    • 1

      Wear a protective face mask and googles -- soot is acidic -- and ensure the inside of the chimney has been cleared of all residue such as soot and broken or crumbling stone or brick. Assemble materials and find an open space where the chimney liner may be straightened out to its full length.

    • 2

      Measure the length of the chimney from the point where the liner should end, to the crown of the chimney. Add 1 foot. Wearing protective gloves, cut the flexible chimney liner hose to the required length using a saw or metal snips. Leave the cut edge smooth and free of jags. Measure and cut a corresponding length of insulating material, allowing for at least a 1-inch overlap on the width.

    • 3

      Lay out the insulating material full length and lay the chimney liner hose on top. Work along the length of the hose, wrapping with the insulating material and securing the wrap at intervals of 1 foot with foil tape. Finally, run the length of the seam with the foil tape so the entire tube is securely fastened.

    • 4

      Unroll the length of wire mesh and place the liner on top. Encase the entire length of the chimney liner in the mesh. Holding one end of the encased liner, pull at the other end so the tube is tightly secured. Fasten with hose clamps and trim away any excess mesh, leaving the liner ready to be installed into the chimney cavity.

    • 5

      Position one person at either end of the chimney and ideally a third person at the roof end to help position the liner as it is fed into the chimney. Center the liner to avoid scraping it against the interior chimney wall. Apply silicone caulk generously to the crown, and press the top plate onto it before tightening a quick connect clamp around the liner, securing the liner to the top plate. Fit the cap over the top plate collar and tighten the hose clamp.

    • 6

      Attach the appliance connector to the liner and the termination point at the bottom. Cut a hole in the mesh and insulation to allow access for the connection. Secure the bottom connection using the metal band supplied with the connector. Finish off by bricking in the hole around the end of the liner.