About This Service
Distinguish cap from crown
A cap and the masonry crown are different chimney-top components. A missing cap does not establish that every leak originates at the opening, and a cracked crown needs its own assessment. The repair scope should name the part being corrected and explain its relationship to the reported concern.
Review masonry defects before coatings
BIA guidance treats investigation and correction of defects as part of addressing water penetration. A water-repellent treatment is not a substitute for repairing failed joints or other defects. We discuss whether the material and condition support a treatment after the underlying concern is understood.
Keep roof investigation professional
Do not climb onto a wet roof, remove a cap or dismantle flashing to investigate a leak. Describe observations from a safe position and share photographs already available. The visit should plan the access needed to inspect the relevant details.
Do Not Equate Mesh With Water Protection
A screen or mesh component and the top of a cap perform different roles within the fitting. Damage should be assessed as part of the complete cap and termination. Replacing a screen alone is not evidence that a crown, flashing or other water-entry concern has been corrected.
Separate Condensation Questions From Rain Entry
Dampness near equipment should be described without assuming it is rainwater from the chimney top. The timing, location and installed system can lead to different assessment questions. Twin discusses whether the proposed chimney repair addresses the observed concern or whether another cause remains to be investigated.
