System or conditionWork to understandWhat changes the decision
TPO and single-ply
TPO is a thermoplastic membrane with welded seams. Seams, perimeter securement, curbs and penetration details deserve the same attention as the open field. An appropriate repair must match the existing material and the condition of its surface.
Existing material, seam condition, attachment and wet layers define repair compatibility.
Drainage and low-slope replacement
Flat-roof replacement can include insulation and drainage changes as well as membrane work. Tapered insulation, drain elevations and scupper paths have to fit the building. Ponding water is a reason to investigate the drainage and structure, not simply add a thicker surface product.
Drain elevations, insulation and deck condition need a building-specific plan.
Coating candidate
A dry, adherent and compatible base with preparation, localized repair and reinforced details.
Unresolved moisture, failed substrate or drainage cannot be covered away.