Keeping Distance Between Chimney Liner and a Wall Keeping Distance Between Chimney Liner and a Wall

Keeping the distance between the chimney liner and a wall is simple. Before gathering materials and beginning, you want to check with building codes of your district, county, or state.

Gathering Materials

Many home improvement stores sell liner kits at a 10:1 ratio for chimneys less than 25 feet in height, and a 12:1 ratio for anything over 25 feet. The measurements come from the width and depth of the chimney, noting that a chimney that is up to 600 sq ft. (including insulation) would only need a 9 inch liner. 

Usually, the kit comes with:

  • Flex tubing
  • Stack off (boot)
  • Insulation plug or bottom plate
  • Installation instructions

Insulation

Don’t forget that the chimney must be insulated before the liner is placed in the chimney. To not do so would be in violation of building codes, causing fines and a possible restart of your chimney project. This would be a waste of time as well as a waste of your good money spent. Keeping distance between the chimney liner and the wall is necessary in order to pour cement between these 2 materials. This is done in order to insulate the chimney so that heat is kept within the chimney and also within your house.

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