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A piece of siding is used as sill extension and to provide slope in the opening for the window, which is deeper because exterior rigid foam has been added
Before installing the windows, the window rough openings are sealed with a liquid-applied flashing that provides a seamless moisture and air barrier to protect the wall from water intrusion.
Proper flashing around windows is especially important when the rigid foam serves as the drainage plane in the wall
Right - Tape flashing keeps moisture out around and below the window; extra tape reinforces the corners to prevent tearing of the house wrap and to keep water out of this critical juncture.
Right – The flashing is properly installed to create a complete drainage system with continuous rigid insulation sheathing/siding
Right – There is flashing installed along the top of the window and the water-resistant barrier is layered over to create a complete drainage system
Wrong - Stucco has rotted and cracked above a window because of water damage due to lack of proper flashing and drainage.
Wrong – The corners are not properly flashed, leaving a vulnerable area in the drainage system