About This Service
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.
Distinguish component repair from a rebuild
Localized damage does not automatically require rebuilding an entire chimney. Conversely, a cosmetic patch is not a substitute for a broader repair when the condition calls for it. We explain the extent of the proposed work and the findings that support it.
Match Junction Work to Surrounding Materials
Roof coverings and chimney construction can affect the detail being repaired at their intersection. Identify the materials actually present before treating an example from another property as the specification. Twin explains the relevant chimney work and any separate roof scope needed to address the connection coherently.
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.
Coordinate Disposal of Failed Components
A detached cover, cap or removed patching material may be part of the access and disposal scope. Explain what is present from a safe position rather than retrieving it yourself. The proposal should describe removal as well as the new work so the property owner understands what completion includes.
