Chimney liner installation for homes in Bithlo

The code says masonry chimneys shall be lined

Section R1003.11 of the Florida Building Code, Residential, requires a lining in every masonry chimney, and it has to suit the appliance it serves, as that appliance's listing and its manufacturer's instructions set out.

That second half matters when relining. A liner is not a generic tube. It is chosen for the stove, fireplace or other appliance it serves, so every proposal we write starts by naming that appliance and then shows how the proposed system meets its instructions. If the appliance is unknown or about to change, we settle that question before anything is sized.

Three situations where insulation helps

One manufacturer lists three situations where an approved insulation wrap enhances the performance and life of the chimney. We explain which, if any, apply to your chimney before you decide, and whether insulation in your case is a requirement or a recommendation.

Insulation also changes the space the liner needs, so the decision comes before the route is proven, not after.

• An installation that must meet UL 1777 at zero clearance to combustibles
• A chimney located on the outside of the house
• Appliances expected to produce low flue gas temperatures

What heat damage does to a clay lining

A chimney fire can crack clay tiles, open the joints between them and leave sections loose. Those gaps expose the masonry to heat and gases the lining was meant to contain.

After a fire, the closer inspection comes first. Any relining proposal rests on what that inspection found, not on the fire alone. Some fire-damaged flues need a full new liner, while others have damage limited to a section, and the written findings explain which describes yours.

Water in the flue and the liner cap

A cap on the liner keeps rain from falling straight down the flue. Water that enters through the crown, the brick or the flashing takes a different path and needs its own repair.

We trace where water is actually getting in before crediting a liner or cap with a fix it cannot deliver. Stains on the ceiling beside the chimney, damp in the firebox and rust at the damper each point to different paths, so tell us exactly where you have seen water.