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Sealing or rebuilding the chimney crown in Kendale Lakes

A new crown gets slope, an overhang, a drip edge and a sealed joint at every flue.

  • Owned and run locally
  • Available for same-day service
  • Fully licensed and insured
  • Family owned and run

Crown cracks and other early warnings

  • Dark streaks on the brick below the top
  • Peeling coating from an earlier repair
  • A crown patch that has cracked again
  • Crown and brick separating along the top course
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Sealing a sound crown or replacing a failed one

Setting a precast crown on a bond break

A precast crown sits on a mortar bed over the brick. Brick industry guidance places a bond break between the brickwork and that setting bed. The break lets the crown move a little with temperature without cracking the masonry beneath it.

That layer is invisible once the job is done, so ask about it. Your estimate should say how the crown is bedded, how it is separated from the brick and how the joints at the flues are sealed. Those details decide how well the new top performs.

An earlier crown coating that is peeling

A crown coating that lifts at the edges or blisters in the middle has lost its bond. Water may be getting behind it. Once that happens, the membrane can hold moisture against the concrete instead of keeping it out.

We check whether the failed coating can be removed cleanly and whether the concrete beneath is still sound. If it is, a fresh application may be possible after preparation. If the crown has deteriorated under the old membrane, we explain replacement. Either way, the peeling layer comes off before anything new goes on.

Keeping the flue sealant joint in good order

The sealant joint at each flue is often the first part of a crown to wear. Brick industry maintenance guidance expects sealants to need replacing well before the masonry around them. A split or hardened bead lets water run between liner and crown.

During maintenance visits we check that joint on every flue. Failed sealant is cut out, the joint is cleaned and primed, and a new bead goes in over backer material. It is a small job that protects the larger work of the crown.

What changes the size of a crown job

No two crown jobs are the same size. The amount of unsound concrete, the number of flues, the chimney's height above the roof and the roof access all change the work. So does whether the cap and any damper must come off.

We explain which of these apply to your chimney. Your estimate shows each item with upfront pricing and no hidden fees. If the job changes once work starts, we stop and discuss the change with you before any extra work is done.

Inside a crown repair proposal

  • Crack preparation before any coating
  • Cap removal and reinstallation
  • Protection for roof covering and brick faces
  • Access plan for the roof and chimney top

Chimney crown work, questions and answers

Why does a new crown need to overhang the brick?

An overhang with a drip edge throws water clear of the brick face instead of letting it run down the chimney. The code also calls for a drip edge on the top of a masonry chimney. Without one, water can keep soaking the top courses.

Can I coat the crown myself with a product from the store?

A crown coating only works on firm, clean and dry concrete, and it cannot hold loose pieces together. Roof work also carries real risk. If you are considering it, ask us first whether your crown is a suitable surface for any coating.

How is debris from the old crown handled?

Broken concrete is lowered from the roof with care, and the work area is cleaned. We haul the debris away. Should the job pause with the chimney top open, we fit a cover over it before leaving and keep it there until work resumes.

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