Map drainage, seams, penetrations, and equipment before selecting membrane work

Roof check

From safe interior and ground positions, record leaks by room grid, parapet or wall, roof drain location if known, equipment cycle, rain or thaw timing, and exterior overflow. Do not access a roof because it appears flat; edges, wet membranes, ice, skylights, hatches, and concealed openings remain dangerous. Property staff should preserve roof-access control.

Season planner

Spring thaw can reveal drainage and membrane transitions; summer heat changes surface temperature and working conditions; fall debris may affect drains; winter snow conceals seams and adds access limits. Discuss a weather window, daily dry-in, and temporary protection without turning a seasonal plan into a guaranteed start or completion date.

Visible warning signs

Identify membrane type through records and professional observation, along with seams, flashings, curbs, penetrations, parapets, copings, drains, scuppers, overflow, insulation, cover board, deck, traffic paths, and equipment supports. Color alone does not identify a membrane or attachment. Ask which components are roof work and which belong to mechanical, masonry, structural, or drainage trades.

Roof system choices

The scope should state cleaning or preparation, repair area, removal layers, insulation replacement, cover board, membrane and attachment or adhesion, seam method, flashing height or termination, drain tie-in, edge metal, protection, test, and warranty effect. If wet insulation or deck is suspected, define how extent will be found and authorized.

Project path

Coordinate locked access, escorts, roof-hatch condition, fall-protection planning, equipment shutdowns, tenant operations, loading, crane or lift needs, material storage, odor or noise constraints, interior protection, and weather monitoring. Commercial and multifamily properties need one authorized contact to coordinate affected uses and separate contractors.

Questions before work

Ask how the entry path was localized and which areas remained inaccessible. How are trapped moisture, membrane condition, drainage, and deck evaluated? What result changes a local repair into a larger removal? How will seams and penetrations be documented before coatings or cover hide them? What maintenance or traffic restrictions follow?

Closeout record

Keep an annotated roof plan with drains, scuppers, curbs, repaired seams, patches, wet-area findings, insulation and deck replacements, membrane batch or product records when provided, adhesion or fastener information, weather, tests, permits, and warranties. Update the map after equipment or penetration work so future leaks are not investigated against an outdated roof layout.

Decision notes

For a leak near rooftop equipment, ask which party inspects the unit cabinet, condensate, piping, curb, duct, electrical penetrations, and roofing. Coordinate a joint visit if evidence crosses boundaries. The roof proposal should not absorb an equipment diagnosis, and the equipment report should not assume the membrane is sound simply because no opening was made.

Discuss access paths and protection for future service after repair. Walk pads, marked routes, curb clearances, drain access, and rules for other contractors can reduce accidental damage. Record new penetrations and removed equipment on the roof plan. A technically sound patch can still be vulnerable if later workers cannot identify where the membrane, seam, or concealed repair lies.

For recurring ponding or slow drainage, ask the appropriate professionals to distinguish membrane surface, insulation or deck slope, blocked drains, undersized or altered outlets, structural deflection, and temporary debris. The roof contractor should document the observed water boundary and drainage test limits. Do not prescribe added drains or structural changes from a photograph without design and permit review.

Record who clears and observes primary and overflow paths after future weather, and which condition requires renewed professional assessment rather than routine maintenance.