Hearth extension repair done right in LaVina

How far the extension reaches in front and to the sides

Section R1001.10 sets the size. A hearth extension reaches at least 16 inches in front of the fireplace opening and at least 8 inches beyond each side of it. Those figures apply to openings smaller than 6 square feet.

We measure your existing extension against the opening, then mark where it meets or misses the rule. A hearth that looks generous can still be short at one side, and a narrow apron often explains why floor finishes near the fireplace carry heat marks.

A crack through a single stone hearth slab

A one-piece stone hearth can crack from a point load, a dropped log or movement under the slab. Once it cracks, the two pieces may stay flush or begin to rock against each other.

A tight crack in a well-supported slab can often be filled and left in place. A crack with movement means the slab has to be lifted and re-bedded, or replaced if the break left pieces too small to trust. We explain the choice with the slab in front of us.

• A tight, stable crack filled in place
• A moving crack lifted and re-bedded
• A badly broken slab replaced

Condominium and association hearths

In a condominium or a community with an association, the hearth may belong to a unit that shares walls, chimneys or rules about visible changes.

We suggest checking with the association before choosing a new finish. The repair itself follows the fireplace and the code, and our written scope gives the association a clear description of what will change and what will stay.

• Association rules checked first
• A written scope for approval
• The repair itself follows the fireplace and the code

Why a flush hearth needs its full extension

A fireplace whose firebox floor sits at the height of the room floor has nothing to stop a rolling log or a spray of embers. The hearth extension in front of it is the only barrier between the fire and the floor.

That is why the code keeps the full thickness rule for flush fireplaces, and why we measure their extensions closely. If a flush hearth is short or thin, we treat it as a priority item on the estimate.