Chimney Crown

The crown is the chimney's roof, and on most chimneys it was the first thing built wrong. A proper crown is a sloped, reinforced concrete cap that overhangs the brick by two inches or more, drains water away from the masonry, and isolates the flue tile with an expansion joint so thermal movement never cracks it. What countless chimneys actually have is a flat mortar wash troweled flush to the brick — a detail that cracks in its first few freeze-thaw cycles and funnels water straight into the structure. Texas Service Experts repairs and rebuilds crowns to the standard the original mason skipped, because the crown is the single most cost-effective place to stop water before it starts.

The right repair depends entirely on the crown's condition, and we're precise about the line between the two. A structurally sound crown with hairline cracking gets a brush-applied flexible elastomeric CrownCoat-type membrane that bridges the cracks and sheds water while staying elastic through Texas temperature swings — a real seal, not a brittle smear. A crown that's cracked through, spalled, or never more than a thin mortar wash gets recast: we demolish the failed crown and form-and-pour a new sloped concrete crown with the overhang, drip-edge kerf, embedded reinforcement, and flue-tile expansion joint that make it last decades. We tell you honestly which path yours is on, because sealing a crown that should be recast is money spent on a structure that's going to fail anyway.

Because the crown sits at the top of the leak hierarchy, getting it right protects everything underneath — the brick, the flue, the firebox, your ceilings. We detail the bond-break isolation around each flue tile, the drip kerf that throws runoff clear of the brick face, and the slope that drains instead of ponding: the small details that separate a crown that lasts from one that cracks again next winter. On a wide or multi-flue top we embed wire mesh or rebar against cracking, pack backer rod and high-temp sealant into the expansion joint so thermal movement doesn't telegraph into the concrete, and trim protruding flue tile to the 2-to-4-inch projection code wants instead of burying it or leaving it over-long. We handle the smaller crown failures honestly too — a single cracked top course of clay tile, a chimney pot cracked through — fixing the actual defect rather than upselling a recast you don't need.

Get the crown right and you've addressed the leading cause of chimney water damage at its source — which is why we always start at the top. And since the same crew is already up there, it's the sensible moment to seal the cap, check the flashing, and look in on the attic insulation the crown was quietly soaking, so one visit closes the whole water path instead of treating each symptom on its own trip.