Curb, flashing, and glazing diagnosis for skylights set in tile fields and foam sections, where the wet ceiling below rarely names the failed detail above.
Scottsdale custom homes carry a lot of glass overhead, and a drip at the shaft is one of the most misread symptoms in roofing. The skylight is simply the lowest opening in the ceiling near the water, so it gets blamed first. The actual entry may be the curb flashing, the glazing seal, a saddle of dried underlayment just upslope, a cracked foam coating at the curb base, or a parapet detail feeding the same shaft from the side.
The unit and the roof meet at the curb, and that joint carries most of the risk. On tile, the flashing must hand water back onto paper that is still doing its job; when 15-to-20-year felt has gone brittle around the curb, water skips the flashing argument entirely and enters through the field. On foam, the coating turn at the curb base cracks with movement and bakes in summer sun. The inspection should test each layer before anyone quotes a new skylight.
Flashing, glazing, or the roof around it
Three different failures produce the same wet drywall. A flashing failure is a roofing repair: lift the surrounding tile or cut back the foam, rebuild the curb metal and waterproofing, and tie into sound material. A glazing failure lives in the unit itself, where the seal between glass and frame has given up, and points toward reglazing or unit replacement. A field failure sits upslope in the underlayment or coating, and replacing the skylight would spend money without touching it.
Timing and pattern separate them. Water that arrives only with wind-driven monsoon rain suggests a lap or flashing path that gentle rain never tests. A drip that follows any wetting of the glass points at glazing. A stain that grows after the roof has drained argues for water stored in the field, arriving slowly along the shaft. Interior photos, hose testing where safe, and a controlled lift beside the curb settle the question with evidence instead of a guess.
Repair honestly, replace when the unit has failed
Sealant smeared around a skylight is the classic short repair. It can buy one season while hiding the joint that actually moved, and it complicates the proper rebuild later. A durable curb repair states which courses were lifted or how much foam was cut back, what flashing was rebuilt, and how the new work laps into the field. Scottsdale planning ranges put this class of work in the moderate leak-trace band at $800-$2,000 when the surrounding roof is sound.
When the glazing seal has failed, the frame has corroded, or an older plastic dome has gone chalky and cracked, unit replacement belongs in the conversation, and the curb should be reflashed while the opening is already dressed. A failing unit over occupied space is also worth replacing during any underlayment or recoat project rather than after it. Call (623) 283-1450 with the room, the drip timing, and the roof type around the skylight, and the inspection can be routed with the right materials on the truck.
From first symptom to written repair scope
The first conversation establishes the material, leak behavior, flat sections, skylights, parapets, recent weather, safe access, and any gate or property-manager instructions. Those details determine what the inspector should examine and whether temporary protection needs to precede a complete diagnosis.
After inspection, the homeowner should receive photos tied to a written scope. It identifies the failure, work area, material assumptions, temporary measures, cleanup, and any credible restoration or replacement alternative. The assigned contractor verifies applicable city, county, and HOA requirements before replacement or structural work begins.
Related decisions are explained in the tile repair guide, foam roof guide, leak-tracing guide, and Scottsdale pricing guide. Each page addresses a different part of the scope so bids can be compared against the roof condition actually documented. A free inspection with photos is the starting point when the roof's condition is the open question.
