DIY Network

How to Repair a Flue

Learn how to repair different parts of a flue -- from the basement to the roof -- to prevent a backdraft. These step-by-step instructions also demonstrate how to repair drywall once the repair is complete.

DIY experts show you how to remove and replace the flue inside a wall, repair the seal up on the roof, install a fire stop in the basement, and patch the drywall after the repair is complete.

Install a new flue in no time.

  • Time

    Two Days

  • Price Range

    $100 - $250

  • Easy/Moderate

    Moderate to Hard

How to Replace a Flue

A backdraft in this homeowner's flue is sending deadly gases into the home. Learn how to remove and replace a faulty flue and secure the top to the roof.

  • Time


  • Price Range

    $50 - $100

  • Easy/Moderate


How to Vent a New Flue

Once a new flue has been installed the next step is to connect it to the water heater in the basement. The following steps show how to install a fire stop and vent a flue and water heater.

  • Time

    1 hour

  • Price Range

    $1 - $50

  • Easy/Moderate

    Easy to Moderate

New Flue Installation: Replace Drywall

Learn how to complete a new flue installation by replacing and painting the cut drywall.