How to install drip edge over window? To prevent water from entering window setting and causing rotting of wood for siding and sill, install a drip window cover. It is installed at top of window, and diver’s water away from window during a storm. You can buy preformed drip caps, and with little more than a hammer and nails, you can install them quite easily. Buy a pre-formed aluminum or plastic window drip channel from any home improvement center or retail window outlet.
If putrefaction of wood is present, replace wood there. Pry up or remove a row from top side of window. Eliminate waste. Cut how to install drip edge over window with a length slightly wider than window. Apply tape above blinking window. Slide liner under cover against flashing tape. Nail cover to liner with galvanized nails, making sure lid tilts away from window. Caulking along top edge of drip cap.
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Cover with water-repellent membrane nails or felt cover, or use tar on each nail head. Cut both edges of how to install drip edge over window protruding width of window along with tin snips to two flaps. Double so wind cannot blow rain under lid. Apply exterior grade sealant along edge of drip cap against house. Replace coating. Leave a space of 1/4 inch above window so that water cannot seep under coating. Caulk both ends of drain cover.