Request an assembly description
A TPO product name is only part of the proposal. Ask for the deck and insulation assumptions, attachment approach, perimeter and penetration details, and any removal scope.
Clarify verification and documentation
Ask the proposed installer which inspections and installation records apply to the selected assembly. Confirm the manufacturer’s current project-specific requirements directly.
Read the warranty boundaries
Review the exact written terms, exclusions, registration responsibilities and maintenance obligations. Do not infer a contractor qualification or coverage commitment from a generic system guide.