Albuquerque's intense UV exposure degrades skylight glazing and curb flashing sealants faster than most markets. Most commercial skylight leaks are flashing failures, not glazing failures — we identify which component failed, repair or replace it correctly, and verify watertight before demobilizing.
Commercial skylights are common in Albuquerque retail, restaurant, and mixed-use buildings — daylighting is a significant energy and comfort benefit in a market with more than 300 sunny days per year, and New Mexico architects specify skylights heavily in commercial construction from the 1990s forward. The Old Town cultural corridor, the Nob Hill retail strip, and the newer Uptown mixed-use developments all have high concentrations of skylighted commercial buildings. Those skylights operate in one of the most UV-intense commercial environments in North America.
The most common source of commercial skylight leaks in Albuquerque is the curb flashing — the roofing membrane that transitions from the horizontal roof field up the vertical face of the skylight curb and terminates under the skylight frame. This flashing degrades through the same mechanism as parapet base flashings: UV exposure on the south- and west-facing curb faces, sealant shrinkage at the frame interface, and repeated thermal cycling at the curb corner detail. At Albuquerque's elevation, the UV load on a south-facing curb face is meaningfully higher than sea-level markets, and the frame-to-flashing sealant joint sees the full 40-plus degree daily temperature swing that the building experiences.
Glazing failures — yellowing, surface crazing, and brittleness in acrylic or polycarbonate panels — are a secondary source of skylight problems and a separate repair category. At Albuquerque's UV exposure level, flat acrylic skylight panels show significant degradation between 10 and 15 years of service — compressed from the 15-to-20-year timeline typical in lower-elevation markets. When glazing degrades, it loses transparency, loses structural reserve against hail impact, and in some cases develops surface micro-cracking that allows direct water infiltration through the panel.
Curb Flashing Rebuild
A curb flashing rebuild strips the existing base flashing from the curb face, cleans and primes the curb substrate, and installs new membrane flashing per the roofing system manufacturer's curb detail. On TPO systems, the curb flashing is heat-welded to the field membrane at the curb base and mechanically terminated at the top of the curb under the skylight frame. On EPDM systems, the flashing is bonded with EPDM adhesive and terminated with a metal counterflashing. On silicone-restored roofs — common in Albuquerque's aging commercial inventory — we coordinate the curb flashing detail with the silicone coating manufacturer to ensure compatibility.
The frame interface is the most critical joint in the curb flashing detail. The aluminum skylight frames standard on most Albuquerque commercial buildings move 3/8 inch or more across the full summer-to-winter temperature range at this elevation. A rigid caulk at the frame-to-flashing termination joint fails at this movement within two or three seasons. We use manufacturer-specified flexible sealants at frame interfaces and document the product used in the repair record.
On buildings with multiple skylight units — common in Albuquerque's big-box retail along Coors Blvd and the strip retail buildings on Montgomery and Louisiana Blvd — we assess all units during a single mobilization. Units that share a flashing run often show progressive failure from the upslope unit toward the downslope, and repairing one while leaving adjacent units in marginal condition typically produces a callback within one monsoon season.
Glazing Replacement
Flat skylight glazing on Albuquerque commercial buildings is specified as acrylic, polycarbonate, or tempered glass depending on the building's age, occupancy, and insurance requirements. Acrylic is the original glazing on most pre-2005 Albuquerque commercial installations and shows visible UV degradation — yellowing, surface crazing, reduced light transmission — beginning at 10 to 12 years in this market, compressing from the 15-to-20-year timeline typical at sea level.
Polycarbonate panels with UV-stabilized coating are the specification we recommend for replacement glazing on Albuquerque commercial skylights for two reasons. First, polycarbonate is more impact-resistant than acrylic against monsoon hail — Albuquerque's convective summer storms produce enough stone-size variability that the additional impact reserve is meaningful. Second, modern polycarbonate UV stabilization is engineered for high-altitude UV environments, extending effective service life in Albuquerque conditions beyond what standard acrylic provides.
Glazing panel replacement requires removing the retaining bars, extracting the failed panel, inspecting and reseating the glazing gasket, installing the new panel, and reseating the retaining bars to the manufacturer's specified torque. We do not install replacement glazing over an old or compressed gasket — a deteriorated gasket produces a leak at the frame line within the first rain event after installation regardless of how carefully the panel is seated.
Verification Before We Leave
Every completed skylight repair — whether curb flashing rebuild, glazing replacement, or both — gets a water test before we demobilize. We flood the curb for fifteen minutes and verify no water entry at the frame-to-flashing interface, at the glazing gasket, or at the retaining bar line. This step is not optional. Skylight leaks in occupied Albuquerque commercial space produce disproportionate disruption and liability for building owners, and a repair that leaks at the first monsoon event after our mobilization is a failure of basic quality control.
For Albuquerque buildings where skylights serve as primary daylighting in tenant spaces — restaurants and cafés in the Nob Hill and Old Town corridors, retail in the Uptown and Coronado Center corridor — we coordinate skylight repair around tenant operating hours. Evening and weekend schedules are available when daytime work is not feasible.
Frequently asked questions
How do I tell if my skylight is leaking at the curb or through the glazing itself?
We run a targeted water test: apply water to the glazing panel surface only — not to the curb or frame — for fifteen minutes and monitor the interior. If no leak appears, the glazing is intact and the source is at the curb or frame interface. If water appears, the glazing is the source. We run this test as the first step of every skylight diagnostic.
My acrylic skylight panels are yellowing but not leaking. Do they need replacement?
Yellowing means the UV stabilizers in the acrylic have been consumed — the material is now brittle and has reduced structural reserve. In Albuquerque's hail-capable monsoon environment, a yellowed acrylic panel is meaningfully more likely to fracture under stone impact than fresh material. We document yellowed glazing as a capital planning item — replacement may not be urgent today, but it should be in the plan within one to two budget cycles.
Can I replace acrylic panels with glass?
Often yes, but the frame must be capable of supporting the additional weight and the different thermal expansion coefficient of glass versus acrylic. At Albuquerque's temperature swing, the thermal expansion differential is not trivial. We assess the existing frame before specifying glazing material and advise when the frame would require modification to accommodate glass.
Is skylight repair covered by a commercial roof warranty?
Most membrane manufacturer warranties cover the curb flashing as part of the warranted roofing assembly. Glazing and frame components are typically outside the membrane warranty and would fall under the skylight manufacturer's own warranty, if one is still active. We clarify which components are under which coverage before starting any skylight repair.
Skylight leaking or glazing showing UV age in Albuquerque?
We identify whether the failure is at the curb, the frame interface, or the glazing — then repair the right component with a weathertight detail we verify with a water test before we demobilize.
