Fixing cracked flue tiles in Sweetwater
Both ends of the flue are examined at a free inspection before any repair method is named.
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- Available for same-day service
- Fully licensed and insured
- Family owned and run
Warning signs from inside the flue
- A cracked top tile above the crown
- A note about the lining from an earlier visit
- An earlier chimney fire in the flue
- Gaps around an appliance thimble
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Flue repair decisions and their reasons
Appliances a flue repair system may not serve
Repair systems are listed for particular appliance types. One resurfacing system's instructions exclude chimneys venting unlisted appliances and certain gas appliances that run with positive pressure or condense their flue gases. Those appliances need venting their own manuals specify.
Tell us what the flue serves before we recommend a method. If your appliance falls outside the repair system's scope, repairing the tile will not make the flue suitable for it. We explain what the appliance requires and where that work would come from. An appliance change later would mean checking the scope again.
Clearances outside the flue are checked too
A repaired lining still sits inside a chimney that needs the right air space to nearby framing. Repair instructions ask that clearances between the chimney exterior and combustibles be checked against NFPA 211, the building code and the appliance instructions.
We look at the clearances we can reach, such as in an attic or at a wall opening. Hidden areas are described as concealed rather than approved. If a clearance concern appears, it is explained separately from the tile repair and not folded into its price. Clearance notes stay in the findings even when no repair is needed.
Deposits that collect behind cracked tiles
When the lining leaks, soot and creosote can escape through the gaps and collect behind the tiles. There they sit against the masonry, out of reach of a brush. Repair literature points to this as one of the hidden risks of an open joint.
We explain whether your flue shows signs of deposits behind the lining. That finding can change the repair choice, because a surface repair does not remove what is already trapped. The estimate states what the preparation can reach and what it cannot. Where trapped deposits are likely, the findings say how that affects each route.
The mortar that belongs in a flue joint
Joints between clay flue tiles call for refractory mortar, which the code describes as medium-duty and water-insoluble. Ordinary masonry mortar and general patching compounds are made for other conditions. Inside a flue, the wrong material breaks down quickly.
When a repair involves resetting or rejointing tiles, the estimate names the mortar or repair material used. If an earlier repair used an unsuitable product, we explain what that means for the work now. The choice of material is part of the repair, not a detail. Material that suits the flue interior is also what the repair system's listing expects.
What our flue assessment covers
- Flue traced to the fireplace or appliance
- Defects located from top and bottom
- Joint repair along the flue
- Exclusions listed in plain words
Flue repair answers before you approve
How do you know whether my flue qualifies for resurfacing?
The repair system's instructions set the conditions: sound, clean and dry tiles, cracks that will not let pieces loosen, protruding mortar removed, and enough flue size left for the appliance or fireplace. We check each one and tell you the result.
Is resurfacing the same as installing a liner?
No. Resurfacing restores the existing clay lining. One maker states that its sealant does not provide the thermal protection of a liner and is not meant to be used as one. A new liner is a separate job with its own estimate.
Do you use ordinary mortar to fix flue joints?
No. Flue tile joints call for refractory mortar or a listed repair material made for the inside of a flue. Ordinary masonry mortar and patching compounds break down in those conditions. The estimate names the material used.
More Ways to Care for Your Fireplace
- Prefab and Zero-Clearance Fireplace RepairIdentify and repair manufactured fireplace components using the appropriate model information.
- Chimney Masonry RepairRepair affected chimney brickwork and joints with materials selected for the construction already in place.
- Chimney Animal RemovalAssess occupied chimney openings and plan appropriate follow-up cleaning or entry protection.
- Chimney RebuildRebuild the affected chimney section with the retained structure, roof connection and passage included in the plan.
- Gas Fireplace Repair and ServiceGet a model-specific gas fireplace service plan for the fault you are seeing or the maintenance your unit needs.
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Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo