Repair Options

Stone chimney problems we fix in Altamonte Springs

Mortar softer than the stone

Repointing mortar, in Park Service guidance, should be softer and more permeable than the stone it holds and no harder than the original mortar. When a chimney moves with heat and moisture, a soft joint takes the strain. A hard, cement-rich joint pushes that strain into the stone, which is how edges spall and faces crack.

We choose the mortar for your stone, not the strongest bag on the shelf. Our family-owned team explains the choice to homeowners in Altamonte Springs.

Matching the color of the joints

The color and texture of a mortar joint come mostly from its sand, and Park Service guidance notes that matching the sand usually brings the rest into line. We look closely at the old joints, choose a sand and mix to suit them and make a small test before repointing a whole section. Fresh mortar still looks brighter for a while.

The test is shown to you before we go ahead. Our stone chimney experts in Altamonte Springs want the repair to disappear into the wall.

White deposits on the stone

White, powdery deposits on stone or in the joints are salts left behind as water travels through the masonry and dries at the surface. They brush off, but they come back as long as water keeps moving through. We treat them as a sign pointing to the source, whether the top of the chimney, a joint or the roof junction.

Fix the water and the deposits stop. Our stone chimney experts trace the source during a free inspection in Altamonte Springs.

Flashing against an uneven stone face

Metal flashing has to seal against the chimney where it meets the roof, and an irregular stone face makes that harder than flat brick. A bead of caulk run along the stone is not flashing, and it opens again with the first hot spell. Where the roof junction is leaking, we explain the proper fix and price it separately from the stone work.

This junction gets checked on every stone chimney in Altamonte Springs, and the inspection is free.

Working stone in hot weather

Heat shortens the working time of mortar and pulls water out of it too fast. The veneer installation guide suggests dampening the surface to lower its temperature, keeping mortar cool and running the hose to reach cooler water before mixing. We plan the hottest parts of the day around those steps so the new work bonds properly.

Careful timing is part of the job for our stone chimney experts. Ring (645) 465-4122 and we will set up a free look in Altamonte Springs.