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Crown replacement cost, and when you need it

The crown is the sloped concrete top that sheds water off the stack, and in this climate it is the part most likely to fail first. The cost question splits cleanly in two: sound crowns with hairline cracks versus crowns that are structurally done.

Sealing versus replacing

Hairline cracking on a structurally sound crown takes a flexible crown sealant, a job in the mid hundreds with real service life. Open cracks, delaminating sections, missing chunks, or a crown poured flat with no overhang mean replacement: demolish the old crown, form and pour a new one with proper slope, overhang, drip edge, and a bond break at the flue. Replacement typically runs from around a thousand for a modest stack to a few thousand for large or tall ones, with access driving the spread.

Why crown money is the best chimney money

Every failure downstream of a bad crown costs more than the crown: spalled top courses, saturated masonry, damaged liners. The rebuild that a neglected crown eventually causes runs five to ten times the crown replacement that would have prevented it. On the list of repairs to defer, the crown goes last.

Common questions