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Planning a new chimney liner
Planning and installing a new flue lining in Sanford, one step at a time.
An inspection before any relining
NFPA 211 calls for a more thorough inspection before a flue is relined. The inspection establishes the condition of the passage, the structure around it and the appliance connection at the bottom.
That examination decides whether relining is the right answer, what size and type of liner suits the system and which repairs must come first. Our inspection is free, and the relining plan that follows is written down with its price before anything is ordered. If the inspection shows that relining would not solve the problem you called about, we tell you so before you spend anything on it.
When an appliance leaves the chimney
Removing a furnace or water heater from a shared flue can leave the remaining appliance venting into a passage sized for more exhaust than it produces. Under NFPA 211, adding, removing or replacing a connected appliance is one of the moments that call for a closer examination.
We check whether the remaining flue still suits the appliance that uses it. If it is now too large, a liner sized for that appliance is one solution, and we explain it alongside any other option the appliance maker allows. This can happen after a furnace is replaced with a unit that vents another way, leaving the water heater on its own in the old flue.
One path for each appliance
The arrangement of a liner depends on the type, number and location of the appliances using the chimney, as one maker's instructions state. Two appliances are not joined into one liner unless their instructions and the code allow it.
We identify every appliance connected to the chimney before planning, including any that are rarely used. Each one gets a venting plan that suits its instructions, written into the estimate. Where the chimney holds only one usable flue for two appliances, we explain what each maker allows and which options remain.
Height of the liner at the top
A chimney has to clear its roof. The Florida Building Code puts the top at least 3 feet above the point where the chimney passes through the roof, and no part of the building within 10 feet may reach higher than 2 feet below that top.
A liner's termination follows the chimney top, so we check the height before relining. Where the chimney falls short, a listed extension or another change is discussed as part of the plan rather than left for later. The height is taken with a measurement at the roof, never estimated from the ground.
