Chimney cap replacement in San Marco by local cap pros

Band-mount caps for tiles with rough edges

Band-mount caps clamp around the outside of the flue tile instead of reaching inside it. A metal band or a set of screws draws the cap's base against the tile's outer faces. This style suits tiles whose inside edge is chipped or out of square, and tiles slightly larger than a slip-in model allows. It still needs the tile to stand clear of the crown by enough height to give the band something to grip.

We tighten the band evenly on every side, because uneven pressure on clay tile concentrates stress at one corner, and a cracked tile turns a cap job into a flue repair. The band's metal matches the cap's, so the two do not corrode against each other.

Rain that slips past a cap

A cap sheds rain that falls straight down, but wind-driven rain can travel sideways under a shallow hood and into the tile. Some cap makers offer deeper hoods or models with side baffles for chimneys that stand exposed, and their literature says which.

Before we recommend a deeper hood, we confirm the water really arrives through the flue opening. Rain soaking through the crown or the brick shows up in the same firebox, and a larger hood does nothing about it. So the answer names the path we found, what closes it, and whether a bigger cap belongs in it at all.

Water the cap cannot stop

The cap guards only the flue opening. The crown around it takes the same rain, and when it cracks or pulls away from the flue tile, water enters the top of the masonry and runs down inside the chimney. The result looks just like an uncapped flue from below: water in the firebox and rust on the damper. That is why a cap visit includes a close look at the crown surface and the joint where the crown meets the tile. When crown repair is needed, it appears as its own line, priced apart from the cap, making it clear that the new cap was not sold as a cure for a crown leak.