Hearth repair in Catalina

Cracks in a poured concrete hearth

A poured concrete hearth, bare or stained, can develop shrinkage cracks early on and structural cracks later. The first kind usually stays fine and narrow. The second kind widens, steps or comes with a height change across the crack.

We read the crack before treating it. A narrow, stable crack can be cleaned and filled to match the surface. A crack with movement or a height change sends the job back to the support question, and the estimate shows both options when both are possible.

Missing or crumbling grout on a tiled hearth

Grout locks tiles together and keeps ash and debris out of the bed. Once it cracks and falls out, tiles move independently, edges chip and the hollow spots spread.

If the tiles are still firmly set, the fix is to rake out the damaged grout and regrout with a product suited to the location, matched to the existing color as closely as practical. If tiles are loose too, we reset those first. You see the difference between the two scopes in writing.

• Damaged grout raked out
• Loose tiles reset first
• Grout color matched as closely as practical
• Sealer applied where the material calls for it

The ash dump door in the hearth floor

Some masonry fireplaces have an ash dump, a small cast-iron door in the inner hearth that drops ashes into a chamber below. Its frame can loosen in the masonry, and the door can warp, rust or go missing.

A loose or missing ash dump door leaves an opening into that chamber. We reset or replace the frame and door with a fitting unit and seal it into the hearth floor. If you no longer use the ash dump, we can discuss closing it properly as part of the work.

• Frame reset or replaced
• Door replaced with a fitting unit
• Sealed into the hearth floor
• Closed off if you no longer use it

Why the setting bed matters on a hearth

Under every tile is a bed that holds it, whether a mortar bed, a thin-set layer or an older adhesive. When that bed was thin, patchy or the wrong product, tiles let go even over a good base.

When we reset tiles, we remove the old bed down to a clean, sound surface and set each tile in full contact. Hollow spots under corners are what crack tiles later, and a full bed is what prevents them.

• Old bed removed to sound material
• Full contact under every tile
• Setting product suited to the location
• Curing directions followed