About This Service
Track where moisture appears first
The first visible location and timing can help frame the assessment. Explain whether the symptom appears during rain, afterward or under another condition. Those details remain observations, not proof that the component closest to the stain is the source of the leak.
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.
Assess the roof junction
The connection between chimney and roof includes details that manage water at the intersection. BIA describes base flashing and counterflashing as related components. The proposed repair should address the relevant connection rather than assume a surface bead of sealant resolves every junction problem.
Account for earlier patches
The type and location of an earlier patch may influence the current condition. Share records or an accessible photograph if available. Twin assesses surrounding materials and explains whether the proposed work corrects the failed detail, removes unsuitable material or addresses a separate concern.
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.
