This flexible drip cap solves the serious problem of how to keep water out from behind exterior curved mouldings. Without proper flashing water gets behind the moulding and channels down to the hidden window jamb and wall framing below. Over time this rots out the trim, window or door frame and the wooden side walls of the building. We make many replacement mouldings for situations where proper flashing was not used and subsequently the original trim, and often much more, has succombed to deterioration.
IMPORTANT: caulking trim to prevent water penetration is at best a temporary solution. Even though high quality caulks are guaranteed to last for many years, they do not prevent moisture from seeping through in a horizontal sealing application.
Within a few years of installation wind, weather and wood movement will cause the caulk seal to fail and water WILL penetrate behind the window trim. A quality window or door installation will always incorporate some form of water penetration protection, either in the form of a wide ceiling overhang or proper flashing, such as copper, lead, vinyl, polypropylene or this flexible product.