Masonry and factory-built chimney repair in Union Park

Precast crown or one cast on the chimney

A new crown can be made two ways. A precast cap is formed off the chimney and set in place on a mortar bed. A cast-in-place cap is formed and poured right on top of the chimney.

BIA guidance says a prefabricated cap generally performs better and is more easily made water resistant. A cast-in-place cap should take the same shape, with thickened sides and overhangs, carry reinforcement to help control cracking, and have flashing beneath it, which BIA calls highly recommended. With a precast cap, a bond break between the brickwork and the setting bed lets the cap move without distressing the brick.

The right choice depends on the top's size and shape, how the flues sit and how a cap can be lifted into place. Our technicians explain which type suits your Union Park home, and the estimate names the type, its shape and how it will be flashed.

What the attic shows about a chimney leak

If you can reach the attic safely, it often shows where a chimney leak gets in. Look at the framing and roof decking beside the chimney and at the insulation around it. Where the marks start high near the roof, the flashing or the stack above is the likely entry point.

Leave the insulation around a masonry chimney as you found it, and do not pack more into the gap to stop a draft. That gap is an air space the code requires, and a stain beside it is a reason to find the leak rather than to close the gap.

Tell us what you saw and where. The attic signs from your Union Park home go on the estimate beside the roofline and top findings, so the repair targets the entry point rather than the stain.

• Dark stains or drip marks on framing
• Soft or discolored decking beside the chimney
• Damp or matted insulation

Fireblocking where the chimney passes floors

The air space around a masonry chimney stops at each floor and ceiling it passes through. There the Florida Building Code requires fireblocking of noncombustible material, securely fastened, so flame and hot gases cannot travel up the gap. Between wood joists and the chimney it must be self-supporting or rest on strips of metal or metal lath.

The same code asks for fireblocking in concealed spaces of wood-framed walls at ceiling and floor levels, and around openings for vents, pipes and ducts. A framed wall or chase built around a chimney is that kind of concealed space.

Fireblocking can be missing, loose or made of wood or foam that does not belong at a chimney, and it tends to come to light only when a ceiling or wall is opened for some other reason. When a chimney wall or ceiling in your Union Park home is opened for a repair, the fireblocking is checked, and restoring it in noncombustible material is priced on the estimate.

A written estimate that names each repair

A line that says chimney repair with one price under it tells you very little. A useful estimate breaks the job into components, the crown, the flashing, a section of brickwork, the damper, so you can see what each part needs and what it costs.

Each line on ours names the part, the problem found and the repair, with its own price. That makes it easy to compare with another contractor's figures, to phase the work or to approve only the urgent items first. Pricing is upfront, with no hidden fees added once the job starts.

Items you could put off are easy to spot, because nothing is bundled into a single total. The estimate is free, it is in writing before any work, and nothing starts until you approve it. For homeowners in Union Park, the lines you approve are the scope of the job.