Installing French Doors, Images 14-19

Shims are critical for door performance. They're needed behind every hinge and across the top jamb.

Temporarily shimming the gap between the two door sash keeps the unit from distorting or overcompressing the weatherstripping while the door is installed.

The most accurate way to check if a rough opening or installed door is plumb is with a laser.

The easiest way to check for a cross-legged opening or door is with a pair of crisscrossed strings. The strings should touch gently in the center.

The top flashing laps over the upper nailing flange and is installed after the door is in place.

House wrap can be installed either before or after the door unit.

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