Installing High-Performance Windows - Bring on the Window

Scraps of OSB served as shims and provided space for expanding foam sealant.

Metal installation brackets snapped into grooves in the edges of the window unit.

The triple-pane unit was heavy and required three people to set it into place.

Scraps of 2-by temporarily screwed in held the window at its finished "inside-outside" location.

A Winbag inflatable bladder was used to adjust the window side to side and for plumb.

Once the window was in its final position, its installation brackets were screwed to the opening.

The free side of the opening for the operable portion of the window was attached with screws driven through the frame.

A light pencil mark about 1/2 inch up from the unit's bottom helped guide the placement of the flashing and keep it away from the weep holes.

Workers sealed the window to the opening using a tape that repels water and allows vapor to pass through it.

Once the top of the tape was adhered to the window frame, the rest of it was adhered to the dam and to the sill flashing tape.

The jamb flashing was first adhered to the window frame and then extended over to the rough-opening flashing.

The butt edge of a cedar shingle worked well for pressing the tape into the corners.

To complete the window install, the head flashing was adhered. The ends of the head flashing lapped down over the top of the jamb flashing.

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