Installed, do not caulk the horizontal joints above orīelow the window, which would create a water dam. Head casing and seal the drip cap to the sheathing tape With wood casings, use a metal drip cap on top of the Under the housewrap, sealing the window’s top flange Side splines of peel-and-stickįlashing tape go on next, sealing from the windowįlanges to the sheathing wrap, extending 6 inchesĪbove the top of the window opening and lapping over To facilitateĭrainage at the sill, set the window on shims. Of high-quality sealant to create a backup seal, a goodīottom flange, however, which must be left unsealed Recommend bedding the side and top flanges in a bead Remember to increase the rough openingġ/2 inch. Piece of beveled wood siding to the rough sill, sloping One formed in place from flexible flashing tape, as The pan flashing can eitherīe a custom metal pan, an adjustable plastic pan, or Omitted but is critical for leak-free performance in
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