Lining Process

Prior to installation, the chimney is inspected, cleaned and prepared using chimney maintenance procedures and equipment recognized by our industry. Should the flue already be lined, the existing liner is removed.

All openings in the chimney structure such as clean-outs, thimbles, and fireplace openings are sealed and weak areas in the chimney are braced.

The proper size Flu-former is calculated for the particular heating application. The Flu-former, an inflatable rubber former, is then lowered and guided into the chimney flue.

The Flu-former is then inflated and centered within the flue.


The Supaflu mix is prepared (adding water). The material is then pumped into the chimney from the top and fills the space between the Flu-former and the inside of the chimney casing.


After the new Supaflu liner has fully cured, the Flu-former is deflated and removed from the flue, leaving a smooth, round, one-piece liner.