Fireplace hearth repair by local pros in Orwin Manor

The insulating layer some manuals require

Some factory-built fireplace manuals ask for more than a noncombustible surface. One maker specifies a layer of noncombustible, inorganic material with a stated thermal conductivity under the finish, and shows how to work out the thickness needed from the rating of the material chosen.

That layer is easy to lose in a remodel because it hides under the tile. When we replace the finish on a hearth like this, we confirm what the manual requires underneath and rebuild the layers in order, so the new surface keeps the protection the original design had.

• A noncombustible, inorganic insulating layer
• Thickness worked out from its rating
• The finish laid over it in order

Finish materials that suit a hearth

Hearth finishes come in many forms. One fireplace maker lists tile, slate, brick, concrete, metal, glass, marble and stone as noncombustible materials that may cover a hearth extension, and each of them repairs in its own way.

At the free inspection our pros identify the material you have, explain how it repairs and show where a patch will be visible. You choose between a spot repair and a wider replacement with the tradeoffs laid out in the estimate.

When the whole hearth finish should be replaced

Replacing the whole finish makes sense when many tiles are hollow, the matching tile is gone, or the extension has to grow to meet the size rule anyway. It also gives a chance to rebuild any layers the original job left out.

Full replacement is a bigger scope and a bigger visual change, so we only suggest it with a reason. The estimate lists removal, base preparation, the new finish, the edges and trim, and any flooring that has to be adjusted around the new extension.

• Removal and disposal
• Base preparation or rebuild
• New finish and setting materials
• Edges, trim and floor transitions

A hearth rug is an extra layer on top of the hearth

Fire-resistant hearth rugs sit on a hearth or on the floor in front of it. They catch ash and small sparks, yet the code's size rule is written for the hearth extension itself, built of noncombustible material on noncombustible support.

If a rug is covering a short or damaged extension, we recommend repairing the extension and treating the rug as an extra. We point out, too, when a rug is hiding cracks that belong on the repair list.