Roof flashing or galvanized metal strips that divert water away from critical parts of a roof are an important part of preventing water damage. Flashing is typically used around skylights, chimneys, and venting. In some cases, damage to roof flashing can be repaired, but that depends on the extent of the degeneration. If minor damage is present, a sealant can be used to patch holes and prevent leaks. However, if flashing is rusted, no longer flush with the roof, or missing, a full replacement handled by a professional roofing company is necessary to avoid further issues. Because flashing must be soldered in place, it’s not an easy DIY job for most homeowners.