A “flat” roof still needs a drainage plan
Low-slope roofing must move water toward suitable outlets. Surface condition, slope, drains, scuppers, gutters and overflow provisions work together. Recurring ponding deserves investigation rather than assuming a new surface alone will resolve it.
Choose the assembly for the building
Existing layers, insulation, deck condition, rooftop equipment and the ability to create drainage influence the choice of system. TPO is a single-ply membrane; built-up roofing uses multiple layers. Each requires compatible details and installation methods. Neither should be selected solely because it is labeled “flat roofing.”
Common areas to assess
Look at the roof perimeter, seams, flashing, penetrations, equipment curbs, skylights and drainage outlets. Evidence of moisture below the surface can change the scope. Ask whether additional investigation is needed before a recovery or coating is considered. Covering deteriorated or wet materials can leave the underlying problem unresolved.
Repair, recover or replace?
A limited defect may be repairable when the surrounding assembly is sound. Recovery and coating options depend on compatibility, condition, moisture and applicable requirements. Replacement may be the more suitable choice where damage is widespread or drainage needs a broader correction. Ask for the reasons behind the recommendation.
Coordinate future maintenance
Keep drains accessible and discuss routes for technicians servicing rooftop equipment. Roof traffic, new penetrations and poorly coordinated repairs can affect a system after installation. Keep a record of equipment changes and ask that roofing details be addressed whenever another trade works on the roof.
Plan your next step
Bring your questions, existing roof information and priorities to the conversation. Call 415-786-7308 for a free roofing estimate.