When the wind gusts, the smoke comes back down the chimney

It burns fine for a while, then a gust hits the house and a puff of smoke rolls out over the screen. That pattern points at the top of the chimney more often than the bottom. Wind moving across an open flue does not always pull smoke up. On a hillside lot in Pacific Palisades, air climbs out of the canyons, curls over the ridge and the roof, and can drop straight into the flue for a second or two. The fire loses its upward pull, and the room gets the smoke. A cap with a properly sized hood breaks that gust before it reaches the flue opening and gives the exhaust a sheltered place to leave. On some roofs a standard square cap is enough. On others, where the wind arrives from the same direction most evenings, a deeper hood or a wind-directional top does far more. We watch the roofline, note which way the house faces, and look at nearby trees and taller rooftops before choosing one.

Wind is only part of it. An open flue also collects rain, and wet soot carries a sharp, sour smell into the living room on humid days, long after the last fire. Water that sits on the damper plate rusts it, and a rusted damper that will not close fully lets cold air and odour drift down all winter. Birds and squirrels find uncapped flues quickly, and a nest wedged against the smoke shelf will send the next fire's smoke straight back at you. The spark screen around the cap matters here as well. After the Palisades fire of January 2025 and the Woolsey Fire before it, embers leaving a chimney are a real concern on brush-lined streets in Malibu and the upper Palisades. A stainless mesh stops the large ones from landing on a dry roof or a neighbor's hedge. We remove the old cap if there is one, brush off the crown, and fasten the new cap so a Santa Ana gust cannot lift it.

A cap that is too small chokes the fire. A cap that is too large, or sits too low over the flue, can make downdraft worse. So we climb up and measure the flue tile itself, its outside dimensions and how far it stands above the crown, before ordering anything. Houses in Brentwood and Santa Monica often have two or three flues in one chimney: one for the living room, one for a den, sometimes an old furnace flue. Those usually get a single top that covers the whole crown, so smoke from one flue does not drift across into the next. Oversized and odd-shaped flues are common on older homes, and those caps are fabricated to the measurements. Stainless steel holds up to the marine air along the coast, where galvanized caps tend to rust through and streak the brick. A cracked crown gets pointed out before any cap goes on. Bolting new steel onto crumbling concrete only buys a short while.

Installed caps run $170 to $695. The spread comes from size and style: a single flue with a standard hood sits at the low end, while a multi-flue top or a custom wind-directional cap sits toward the high end. You get that figure in writing before we start. A cap will not cure every smoky fireplace. If smoke spills even on a still night, the problem is more likely the flue size, a damper that will not open fully, or a house so tight that the fire is starved for air. We look at those during the same visit and tell you what the cap will and will not fix, so you are not paying for a part that leaves the smoke in place. If we think the chimney needs a sweep or a closer look first, we will say so. To book a visit, use the call button on this page or send the form, and mention when the smoke shows up, since the timing tells us a lot.