Steel flashing is a durable and effective way to protect the vulnerable areas of your roof where water might seep in, such as around chimneys, skylights, and roof intersections. It’s usually made from galvanized steel, stainless steel, or copper steel, chosen for their resistance to rust and ability to conform to different shapes. Proper steel flashing installation involves tightly overlapping sections and sealing joints with high-quality roofing sealant or soldering, creating a continuous barrier that channels water away from seams. The metal should be carefully bent to fit snugly along roof contours, and fasteners must be corrosion-resistant and secured without causing damage. Improper flashing or gaps can cause leaks, which often start small before turning into costly water damage. Simple diagnostics you can try at home include looking for signs of moisture or staining on ceilings and walls near flashing areas or carefully using a hose to simulate rain and check for leaks from inside. Be mindful not to walk on flashing unduly, as it can be bent or loosened.
If you notice any loose edges, rust, cracked sealant, or active leaks around flashing, it’s advisable to call a professional roofer with experience in metal flashing repair or installation. When contacting a contractor, it helps to ask specifically if they will use corrosion-resistant fasteners and how they manage sealing joints—whether by soldering or high-grade caulk—and what their experience is with steel flashing in your climate. Also, inquire about any warranties on their work and the materials, especially since flashing failures can sometimes void roof shingle warranties. A good roofer will inspect surrounding shingles and underlayment, as flashing often works as part of an integrated system. Properly detailed steel flashing, maintained or replaced as needed, offers a long-lasting, low-maintenance waterproof seal that keeps your roof safe through many seasons.