Prefab fireplace repair in Lake Butler

Hairline cracks in refractory panels

Fine hairline cracks in refractory panels are expected as they heat and cool. One maker's warranty on its panels specifically excludes hairline cracks, which tells you how the maker regards them.

Width, depth and loose pieces matter more. We check whether a crack goes through the panel, whether its edges have shifted and whether pieces have fallen out, then compare that with what your model's manual says about replacement.

• Does the crack pass through the panel
• Have its edges shifted
• Have pieces fallen out
• What the model's manual allows

Signs a fireplace has been overfired

Overfiring means running a fire hotter than the fireplace was designed for. One maker lists its symptoms as cracking, warping or burning out of components, plated accessories changing color and glass that develops a haze cleaning will not remove.

The same maker names causes such as burning scrap lumber, pine branches, paper or cardboard boxes in amounts beyond a normal log fire, and burning trash or treated material. Overfiring damage falls outside its warranty, so we look for these signs early in any repair.

• Cracked panels or burned-out parts
• Warped steel
• Plated trim that has changed color
• Glass haze that will not clean off

Offsets and elbows in the chimney

Factory-built chimneys can jog sideways with elbows, within limits. Section R1005.7 keeps every piece of a factory-built chimney within 30 degrees of vertical and allows four elbows at most in the run.

One maker's manual adds its own rules for the length of angled pipe between supports and for the straps that carry the weight above an offset. When a chimney has been rerouted, we check it against both before any repair.

How often a factory-built chimney should be checked

NFPA 211 expects a yearly inspection of every chimney, fireplace and vent. One maker goes further for its wood-burning fireplaces, saying the chimney should be inspected at least twice a year during the heating season to see when deposits have built up.

The same maker says deposits of 1/8 inch or more should be removed. Cleaning is booked as its own service when it is due, and the repair visit notes what the flue looks like.