If you suspect your interior removable grille may be bowed or warped, we recommend using the steps outlined below to straighten the grille. Some degree of bowing or warping is normal and will not affect the performance of the grille. Successful removal of the bow will depend upon temperature, humidity levels, and the degree of the bow.

Interior Removable Grille

Instructions to Straighten Interior Removable Grilles

Remove the interior grille. For information on removing grilles from windows and patio doors, see Identifying and Installing Grille Fasteners for Removable Interior Grilles on Andersen® Windows and Doors.

Lay the grille on a flat, clean surface.

Completely cover with an even weight.

Leave the weight on for a few days, preferably 48 hours in a warm area with sunlight exposure.

©2026 Andersen Corporation. All rights reserved.