Hearth extension repair done right in Washington Shores

The 2-inch rule for a hearth extension

Hearth extensions in front of a masonry fireplace need to be at least 2 inches thick under section R1001.9.2. The extension is concrete or masonry on noncombustible supports, with reinforcement for its own weight and whatever loads it sees.

A thin layer of tile set straight onto a subfloor does not meet that description. If a past remodel replaced the original extension with something thinner, the repair becomes a question of rebuilding the extension correctly. We explain that difference in writing before quoting any finish.

Where wood flooring may meet the hearth

Wood flooring and trim may run up to the edge of a masonry fireplace's hearth extension under an exception in section R1001.11, provided that material stays 12 inches or more from the inner face of the closest firebox lining.

That distance matters after a flooring job. If new planks were pushed tight against a short extension, the edge of the floor can end up closer to the firebox than the exception allows. We check that measurement whenever a hearth repair meets new flooring.

Keeping a good base under a new surface

Not every hearth replacement needs demolition to the floor. When the concrete or masonry base is sound, thick enough and properly supported, the finish can be removed and renewed on top of it.

We confirm the base before promising that shortcut, because a new finish cannot fix what lies under it. Saving a good base usually shortens the job and reduces dust, and the estimate shows it as its own step.

• Base checked for soundness
• Thickness confirmed
• Support confirmed
• Finish renewed on top

Hearth finishes in metal or glass

Some modern hearths use sheet metal, glass tile or a solid glass panel set on a noncombustible base. They look clean and show scratches, chips and loose edges plainly.

Repairs start with identifying the product, since glass and metal finishes come in specific sizes and thicknesses. We confirm the base under them and replace damaged panels or tiles with matching material, sealed and edged to suit the fireplace.

• Product identified
• Base confirmed
• Damaged panels or tiles replaced to match
• Edges sealed and finished