TPO roofing. Specify the complete system.

Separate the structural deck from insulation, cover board and any existing roof surface that remains. These are different receiving conditions. Ask how the proposed attachment reaches or bonds to its specified substrate and which investigation supports that choice. Record uncertain deck types or concealed deterioration as open questions rather than filling the gap with an assumed standard assembly.

Set a documentation point for exposed conditions and repair decisions. Keep location photographs, the proposed correction and authorization together. If the accepted assembly changes because of the findings, update the product and attachment schedules as well as the estimate. A material name on the membrane wrapper cannot establish that the underlying surface was suitable or that every supporting layer matched the reviewed design.

Thermal insulation provides resistance to heat flow. A cover board is a separately specified receiving or protective layer, although particular products can also contribute thermal resistance. These roles do not make the boards interchangeable. Identify flat insulation, tapered areas and protective layers on the roof plan. Compare the exact product and facer against the attachment and membrane documents, and ask whether a substitution changes the receiving surface or assembly evidence.

For thermal review, request the calculation or compliance basis used for this building rather than an unsupported statewide R-value promise. Connect height changes to drains, walls and equipment curbs. Keep the responsible reviewer and unresolved decisions visible. The proposal can then state what is included, what awaits review and how a design revision will affect quantities or related details.

Ask who establishes the wind-design criteria and reviews their application to the building. The record should identify the relevant roof geometry and the assembly information used. A membrane product rating, an isolated fastener pull test or a manufacturer logo is not the entire design basis. Where testing is proposed, state its purpose, location and the decision it informs.

The quantity and installation package should use the same roof-zone plan as the reviewed attachment documents. If a perimeter, corner or field condition is different, make that difference traceable rather than hiding it in a blanket fastener allowance. Changes to the deck, boards or fastening products should return to the appropriate review before substitution. This guide does not calculate pressures or prescribe spacing.

The manufacturer’s application guide controls cleaning, preparation, welding and checking for the selected product. Ask the team to identify that document and the project’s quality-control responsibilities. Weather, material condition and equipment operation belong in the field process; a single generic temperature or speed should not be copied from this website and treated as a universal installation setting.

For the owner’s record, keep a practical location-based account of checks, any identified issue and the corrective work. Connect field seams and complex details to the same roof-plan labels. A final wide-angle photograph can show the finished roof but not every weld condition. Decide beforehand which records will be delivered so closeout does not depend on trying to reconstruct covered work after the crew has left.

List equipment curbs, walls, drains, pipes and perimeter conditions by roof zone. Identify the selected manufacturer detail or the project-specific review for each. Note any curb modification, equipment lift or adjacent wall work that must be coordinated by another trade. If an existing component remains, record the assumption and the assessment needed to connect new work to it.

At completion, update the register for accepted changes and retain applicable inspection, product and coverage documents. Mark excluded areas and ongoing service responsibilities. The handover should help a future maintenance contractor locate a detail without guessing from the original bid quantity. Brand references describe where technical documents can be found; they do not establish Peak’s manufacturer status or promise that a warranty is available for the project.