Rock and fieldstone chimney repair in Fairvilla

Tight-fit and dry-stack styles

Some manufactured stone is fitted tightly for a dry-stacked look. The maker's instructions still require mortar between the units, with joints under three eighths of an inch, and recommend setting the bed on both the backing and the stone to reach full coverage.

Tight-fit walls are unforgiving to repair, since every piece must line up with its neighbors. We remove loose pieces, clean them and reset them level and plumb, with the same full coverage the original installation called for.

Flashing where the stone starts and stops

The maker's instructions call for corrosion-resistant flashing or weep screed and a means of drainage at all penetrations and terminations of the stone cladding, with flashing type and locations following the applicable building code.

On a chimney, those edges include the roof line, the top under the cap and any trim transitions. Missing or failed flashing at an edge can explain water behind stone, so we check every edge on the chimney.

Resetting a loose stone

A loose stone comes out carefully, by hand, without prying against its neighbors. The old mortar is cleaned off the stone's back and the bed it came from, down to sound material.

Then the stone goes back with fresh mortar filling the whole bed, pressed in until mortar squeezes out around its edges, and the joints are tooled to match. Before any of that, we find out why it loosened, since a reset over the same water problem will not hold.

• Removed by hand, neighbors protected
• Old mortar cleaned off stone and bed
• Reset with full mortar coverage
• Joints tooled to the existing profile

What a stone chimney estimate lists

A clear stone estimate separates the work so you can see and approve each part. Ours list the stones to reset or replace, the joints to repoint and how deep, the mortar type and how it will be matched, and any access equipment.

Cap, crown, flashing, drainage and flue items sit on their own lines beside the stone work. Each has its own price, and the total does not change later without your approval.

• Stones to reset or replace
• Joints to repoint and depth
• Mortar type and color match
• Access and site protection
• Related items on their own lines

Permits for bigger stone work

Building departments set their own rules on what chimney work needs a permit, and those rules differ by address. Resetting a few stones is one kind of job, and rebuilding part of a chimney is another.

When work rebuilds masonry or re-clads a chase, we look up the rule for your property before booking and explain any filing it needs. That step is written into the plan.