A coating starts with the roof underneath.
A roof coating should follow an assessment of the existing surface and system. Ask how the proposal addresses repairs, preparation, compatibility and drainage before comparing the coating itself. A new-looking surface does not demonstrate that hidden moisture or a damaged assembly has been resolved.
Establish what can remain
Ask which parts of the existing roof are suitable to receive the proposed system and which must be repaired or removed. The estimate should make this boundary clear. If the roof history is incomplete, discuss what additional investigation may be needed.
Make preparation visible in the scope
Cleaning, repairs, detail work and manufacturer-specified application steps belong in the proposal. Ask how the contractor will confirm that the surface is ready and document the finished work. Different preparation assumptions can explain a large price difference.
Understand the maintenance obligation
Keep the selected product and coverage documents. Confirm inspection, cleaning and reporting requirements, plus how later rooftop work will be handled. Discuss where a coating makes sense and where a replacement comparison would be more useful.
