Chimney repair for homes in Morningside Park

The mortar used to repoint matters

Stronger mortar is not necessarily better mortar. BIA guidance on mortar says no single mortar is best for all purposes and advises choosing the lowest compressive strength that meets the needs of the job. For repointing, it names compatibility between the existing brick and mortar as the most important consideration.

Mortars laid before the early twentieth century were mostly lime and have lower strength, so older brickwork likely needs a weaker repointing mortar than new construction would use. BIA maintenance guidance wants repointing mortar no stronger than the original, and it cautions that a mismatched mortar can make the old brick spall and crack.

The reason is stress. A repointing mortar stronger than the original concentrates stress where brick meets mortar, and the brick faces can spall. The mortar is chosen for the chimney in front of us, and its type is named on the estimate.

Broken and spalled brick faces

Spalling is when the face of a brick breaks away and leaves a rough, recessed surface behind. BIA maintenance guidance notes that water gets through broken or badly spalled brick, and that the damaged units may have to be replaced.

Replacing a brick without finding out why it spalled only sets up the next one, so the joints, the top and the flashing around the damage are checked first. Our chimney brick replacement service handles the work, and on your Morningside Park home the estimate lists the bricks to be replaced along with the cause they point to.

• The damaged brick is broken out to make removal easier
• Mortar around the opening is cut away without harming the neighbors
• New brick and the opening are fully buttered and the brick pressed in
• Joints are pointed and tooled to match the original profile

Decorative shrouds on a factory-built chimney top

A shroud is a decorative metal housing set over the top of a chimney to hide the cap and pipe. On a factory-built chimney, the Florida Building Code allows one only where it is listed and labeled for that specific chimney system and installed per the maker's instructions.

The top of a factory-built chimney is part of what was tested. A shroud that encloses the cap can change conditions at the outlet, and the code ties it to the system's own listing. A catalog shroud can look right and still sit outside it.

If a shroud is already in place, the details below show whether it was made for your system. A listed one is repaired or replaced with the listed part. An unlisted one comes off, and the estimate shows the cap or listed shroud that replaces it.

• The maker and model on the chimney label
• A matching listing for the shroud itself
• An install that follows the shroud maker's instructions

Loose brick above a door or walkway

A loose brick, a cracked piece of crown or a tilted cap over an entry, a patio or a driveway is a falling hazard before it is a repair. Brick Industry Association maintenance guidance counts chimneys among the parts of a building with more severe exposure, which may need repairs at shorter intervals.

When you describe it, say where it sits over the house, what has already come down and whether people walk under it. That tells us how soon the visit is needed and where a ladder can go safely. Keep the area below clear in the meantime.

Loose masonry over a path goes to the top of the estimate, ahead of cosmetic items and even ahead of some leak repairs. The first step is taking down or securing what is loose, then rebuilding on sound material. That order is explained before any work, and nothing begins until you approve it.