A working chimney liner is vitally important because it will protect against dangerous gases leaking into your home. Chimney liners greatly improve the efficiency of old chimneys and provide them with many extra years of life. It is very easy for chimney liners to get dirty and to break after continual use. In this instance, you will have to clean and repair the liner in order to make sure that your home is completely safe.
Step 1 - Prepare
Assemble the extension poles and select the correct size steel brush before going onto the roof. Assembling them once you are on the roof will be difficult and significantly increase the danger to you. Open the chimney flue door. This will make sure that excess dirt does not build up inside the chimney. This will help keep the chimney liner cleaner for longer.
Step 2 - Access Roof
Place the extension ladder safely against the side of your house. Climb up to the roof and make sure you can easily reach the chimney area. Check that you are safe and stable before carrying out any work. A safety harness should always be worn when working at height. Remove the chimney cap and inspect for any obvious signs of damage. Clean the flue screen with the small brush to clear any debris and dirt.
Step 3 - Repair Chimney Liner
Using the safety gloves and making sure you have a stable position on the roof, slowly withdraw the existing chimney liner. If it was installed correctly, it should not be too difficult to move. Removing the chimney liner allows you to inspect it for damage. If damage is minimal, replace the affected section of chimney liner with a new small piece. This can be secured into place with some heat resistant adhesive. Lower the liner back into the chimney once the repair has been completed.
Step 4 - Replace Chimney Liner
If the damage is greater than a small crack, replace the liner completely. Slowly withdraw the existing one until it is completely removed. Using a flexible replacement, slowly lower the new liner into place. Your existing chimney liner will be held in place on a number of threaded studs with wingnuts or hexagonal bolts securing them in place. These must be removed and refastened during the removal of an old lining and the addition of a new one. Make sure it is lined correctly and held securely in position.
Step Five - Clean
Once your repair job has been completed or new liner has been installed, use the large steel brush and extension poles to clean the liner. Slowly push the brush down into the chimney, rotating it as you work. Withdraw the brush from the chimney and any large build ups of dirt and debris should be removed. Do this three or four times to make sure the chimney is completely cleaned from top to bottom. Take care not to be too aggressive as you may cause further damage to the liner.
Step Six - Finish
Finish the process by replacing the chimney cap and cleaning up any debris on the roof. Come down from the roof and go back to the flue door. Inspect the dirt and debris for signs that you could have caused the liner damage during the repair process. Any accumulated debris in your fireplace should be cleaned up immediately.