Skylight Flashing for Metal Roofs in Northern Utah: Leak Signs, Retrofit Options & When to Replace the Curb

A skylight can flood a Northern Utah home with daylight, but on a metal roof it is also the single most common place for water to sneak in. The panel and the skylight are two different materials that expand, contract, and shed snow at different rates, and the only thing keeping them watertight is the flashing where they meet. When that flashing is wrong or worn out, you get stains on the ceiling, drips during the spring thaw, and rot in the curb framing. If you have a skylight on a metal roof in Ogden, Weber County, or anywhere along the Wasatch Front, here is how to read the warning signs and decide what to do next.

Why Skylights Leak on Metal Roofs

Skylights on standing seam and other metal roofs leak for reasons that have more to do with detailing than with the skylight itself:

• Thermal movement. Metal panels grow and shrink with temperature swings. Flashing that is fastened too rigidly to both the panel and the curb can tear, loosen, or open a gap over time.
• Snow and ice loads. A skylight interrupts the clean downhill path of melting snow. Without a proper cricket or saddle on the uphill side, water and ice pile up behind the curb and get forced under the flashing.
• Generic or shingle-style flashing. Step flashing designed for asphalt shingles does not seal correctly against raised metal seams. Many leaks trace back to the wrong flashing being used on a metal roof in the first place.
• Failed sealant. Caulk is a backup, not a waterproofing system. When installers rely on sealant instead of correctly formed metal flashing, the joint fails as soon as the caulk dries out and cracks in Utah’s sun.

Signs Your Skylight Flashing Is Failing

Catch these early and you often save the curb and the surrounding roof deck:

• Water stains, bubbling paint, or a musty smell on the ceiling near the skylight.
• Drips that show up during snowmelt or wind-driven rain, but not every storm.
• Visible rust, lifted metal, or separated seams in the flashing around the skylight curb.
• Daylight or draft around the interior frame.
• Peeling sealant beads or gaps where the flashing meets the panel.

Because the water can travel several feet before it drips, the stain is rarely directly below the real leak. A proper inspection follows the flashing detail, not just the drip.

Retrofit, Reflash, or Replace the Curb?

Once the flashing is compromised, there are three common paths, and the right one depends on how far the damage has gone:

• Reflash the existing skylight. If the skylight unit and curb are sound, the best fix is new, correctly formed metal flashing with a head cricket to divert snowmelt. This solves most leaks without touching the glass unit.
• Retrofit a new skylight into the existing opening. When the skylight itself is fogged, cracked, or past its service life, replacing the unit and the flashing together gives you one clean, warrantable detail.
• Rebuild the curb. If water has already rotted the wood curb or decking, the framing has to be rebuilt before any flashing goes back on. Flashing over rot just hides the problem.

Why Custom-Fabricated Flashing Matters

Metal roofs are not one-size-fits-all, and neither is skylight flashing. Panel profile, seam height, roof pitch, and curb size all change the detail. At Omega Metals we fabricate flashing and crickets in our own shop to match your exact roof, so the metal does the waterproofing and sealant is only a secondary line of defense. That same custom metal fabrication capability is what lets us flash tricky penetrations cleanly on both homes and commercial metal roofs across Northern Utah. We also check that nearby gutters and downspouts are moving the extra water away, since a skylight leak and a drainage problem often show up together.

Request a Skylight Flashing Inspection

If you see stains, drips, or aging flashing around a skylight on your metal roof, do not wait for the next heavy snow. Omega Metals serves Ogden, Weber and Davis counties, and the surrounding Northern Utah communities with honest inspections and custom-fabricated flashing built for our climate. Call 801-731-5788 to schedule an inspection or request a free estimate, and we will tell you straight whether you need a reflash, a retrofit, or a full curb rebuild.