Learn how to install European-style windows that sit within the rough opening and require a face-sealed approach to water and air management.
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When water is leaking in around newly installed windows, chances are that there are some missing or improper flashing details that need to be corrected.
Builder Jake Bruton demonstrates trusted window-flashing details for walls with the following water-resistive barriers: Zip System sheathing, exterior rigid-foam insulation, housewrap, peel-and-stick membrane, and fluid-applied WRB.
Wrap the sides and head of the installed window with Zip System tape, but leave the bottom flange of the window untaped for drainage.
After installing the water-resistive barrier, cut the window opening and then use bevel siding and tape to create a positive-slope sill.
After installing a fully adhered membrane, cut the window opening, fold in the sides, and use bevel siding and tape to create a positive-slope sill.
Use the liquid WRB and a piece of bevel siding to build a sloped sill before liquid-flashing the entire surface.
Dry-fit the window, then run a bead of liquid flashing that provides an extra layer of protection against water intrusion.
Mask off the window to keep things clean when you flash the window flange to the wall.
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