To check the installation of your entire window or patio door unit, or an individual window sash or patio door panel, watch the YouTube® video or follow the written instructions below.
Determining if Your Window or Door is Plumb, Level and Square
Check Unit or Sash/Panel for Even Reveal and Plumb, Level, and Square
Check Reveal
From the exterior side of the window or door, inspect the reveal (the gap between the window sash or patio door panel and the unit frame).
Inspect both the horizontal and vertical reveal. There should be a consistent and even reveal between the window sash or patio door panel and the frame.
From the exterior side of the window or door, check whether the full unit, or an individual window sash or patio door panel, is plumb, meaning the up-and-down, or vertical, pieces of the window or door are straight.
Place the level against the face of the side jambs, the pieces that form the sides of a window frame. The unit (or the window sash or door panel) is plumb if the bubble on the level is centered between the indicator lines.
From the exterior side of the window or door, check whether the full unit, or an individual window sash or patio door panel, is level, meaning the horizontal pieces of the window or door are straight.
Place the level on the window or patio door sill and look to see where the bubble settles. The unit (or the window sash or door panel) is level if the bubble on the level is centered between the indicator lines.
From the interior side of the window or door, check your unit, window sash, or patio door panel for square.
Use a tape measure to take a diagonal measurement from opposite corners of the unit, window sash, or patio door panel. The measurements should be equal.
For full units, if the measurements on the frame are different by more than 1/8", the unit is out of square and should be reset. See directions underFull Unit Not Plumb, Level or Square below.
For individual window sashes and patio door panels, if the measurements of the sash or door panel are different by more than 1/8", this indicates the sash or door panel is out of tolerance and should be replaced.
Check for Square
Resolution
Based on your findings from following the instructions above, view more details below about your applicable concern.
Full Unit Not Plumb, Level, or Square
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If you determine that your window or patio door unit is not plumb, level, or square, it should be reset.
If you would like to reset the window or patio door unit yourself, you will need to remove all insulation and shims and refer to the unit's installation guide for instructions. We recommend configuring an installation guide for your specific window or door using our Installation Guide Configurator.
Window Sash or Patio Door Panel Has Uneven Reveal or is Not Plumb or Level
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To adjust your individual window sash or patio door panel within the unit frame, find the applicable instructions below for your window or patio door type. If you need help identifying the type of Andersen® product you have, use ourIdentify Your Producttool.
