Signs of Chimney Damage Tacoma Homeowners Can Spot From the Yard

The table is organized from outside to inside. The last column is the one to act on.

Water drives most of the outside signs. Rain gauges at the long-running Tacoma #1 station average a little under 40 inches annually, and its thermometers drop to 32°F or lower on about a month's worth of nights, most of them around the holidays and into January. Each freeze expands whatever water the brick has absorbed, which is how flaking faces and crumbling joints start. Moss adds to it: Oregon State University Extension describes how roof moss holds wet debris against the surface and can lift shingles, and the uphill side of a chimney is exactly where it collects.

Age makes the rest more likely. Tacoma's median home was built in 1967, and more than four in ten predate 1960, so a large share of the city's chimneys have already weathered six decades of these winters, many of them far longer.

Pierce County has direct experience. The 2001 Nisqually quake, centered 52 kilometers below Anderson Island, hurt chimneys on so many houses that FEMA's inspectors, per a USGS write-up, found one broken or cracked in every three of the 30,000 they visited. Visible damage often appears at the roofline, where a rigid stack meets a flexible roof, but the flue tiles inside can crack without any outward sign.

Ground shaking that may have harmed a chimney appears on the NFPA 211 and CSIA trigger list for the camera-based Level II. If you felt strong shaking, have the chimney looked at before using it again, even if nothing looks out of place.

One sign is easy to miss because it is not damage at all. Picture a ten-foot circle drawn around your chimney top: under Washington's code, the masonry should poke up two feet higher than any roof, dormer or wall inside that circle, and never less than three feet above its own spot on the shingles. A stack that was cut down after an old repair, or one next to a later addition, may no longer clear those heights, and a chimney that draws poorly leaves more deposits and pushes smoke back into the house on some days.

The Washington State Fire Marshal reports, citing federal data, that in 2024 more than three-quarters of home heating fires, 77 percent, started in a chimney, a flue or a fuel burner. That is the reason to take the inside signs seriously even when the outside looks fine.

An inspection sorts out which signs matter. Chimney repair booked through us is priced from $375 to $3,700 depending on what is found; Homeyou's typical Tacoma repair range, for comparison, is $112 to $792, a figure published by a third party rather than quoted by us. The inspection comes first at $99 plus tax, and its cost is deducted from the repair when you approve our written quote.