Steel roofing and skylight leaks often occur where metal panels meet flashing or where sealants around skylight edges have failed. Steel roofs are durable but can develop leaks from rust, loose fasteners, or damaged seams. Skylights are common leak points because they interrupt the waterproof layer of your roof; water can seep through deteriorated seals, cracked glass, or bowed frames. Temperature changes and weather wear can shrink or crack the caulk around skylights. To diagnose, start with a simple visual check inside for water stains or drips near the skylight or roof joints. On the roof, look for rust spots, loose screws, or damaged sealant around the skylight frame and steel panels. Using a hose or waiting for rain can help comfortably see where water enters without climbing on the roof unnecessarily.
For a safe DIY check, gently touch the sealant and flashing to see if they’re brittle or separated, and clear any debris that might trap moisture. If you’re comfortable with ladders, inspect the condition of caulk and flashing around the skylight and metal joints without walking directly on thin steel panels, as this can cause dents or damage. If leaks persist or if you notice extensive rust or bent panels, it’s best to call a professional roofer who knows steel roofing and skylights. When you do, ask, “What type of sealant do you recommend for steel-to-skylight joints that complies with my roof’s warranty?” and “How will you ensure water-tightness without compromising the metal roof’s finish?” These questions help ensure your repairs are durable and warranty-safe.