many manufacturers recommend using the “Drainage System” for installing windows and doors in most parts of the country, which means applying a cant strip and sloped sill pan under the door or window sill, so that
Doors leading to patios and decks are particularly vulnerable to wetting around the sill from splashback and, in cold climates, from snow buildup.Pan Flashing for Exterior Doors & Windows - Rot below a Sliding Glass DoorAbove: this aluminum sill for a sliding glass door was installed over the...