Andersen® products are manufactured with strict design tolerances for maximum performance for each of our specific product lines. We do not recommend any product modifications which involve handing or operational changes. We do not recommend modifications to your window or patio door that include, but are not limited to, those listed below.

When considering any modifications to your product, we recommend reviewing the Andersen® Owner-2-Owner® Limited Warranty  for your product. Any damage as a result of product modifications is not covered under the terms of the Andersen® Owner-to-Owner® limited warranty . If you need assistance identifying your Andersen® products, visit our Identify Your Product  pathway in the Andersen® Window and Door Help Center.

Modification Is Not Recommended

Replacing Glass 

We do not recommend replacing the glass in your window. See Broken Glass.

Installing an Air Conditioner 

We do not recommend installing a window-mounted air conditioning (AC) unit in the window. While AC units have been known to be installed in windows, we do not offer instructions for installation, as there is too great a risk of damage to the window.

Installing Alarm Systems 

For more information, see Installing an Alarm or Alarm Sensors on Andersen® Products.

Applying Film to Glass 

We do not recommend applying reflective or decorative film to your window or patio door glass. For more information, see Applying Film to Andersen® Window or Patio Door Glass.

Changing the Handing of a Window or Patio Door 

We do not recommend changing the handing, or the direction in which your window or patio door opens. An example is switching the handing of a gliding window to open from the left vs the right-hand side.

To review the different handings available for windows and patio doors, see Andersen® Window and Patio Door Handing.

Changing the Operation of a Window or Patio Door 

We do not recommend changing how your window or patio door operates. An example is converting a stationary window or patio door into an operating window or patio door - or vice versa.

Changing the Operator Type on Your Casement or Awning Window 

We do not recommend converting the style of operator used on your casement or awning window to another style, such as converting from a split-arm operator to a straight-arm operator - or vice versa. Operator styles can be seen in Identify My Andersen Casement Window Worksheet. 

To review the different operators available for casement and awning windows, see Identify Casement or Awning Window Operator.

Reasons that product modification is not recommended include, but are not limited to, the following:

In many cases, the handing is designed into the window sash.

The hardware on the window unit is designed to support the weight and size of the window.

Altering the product could compromise the integrity of the window or patio door unit.

Altering the product may affect the Andersen® Owner-2-Owner® Limited Warranty .

Altering the product could compromise the performance of the unit.

Altering the product could result in property damage.

Altering the product could result in personal injury.

To change your Andersen® product, we recommend a replacement window or patio door. For any product ordered incorrectly, we recommend contacting your Locating Andersen® Window and Door Retailers/Dealers to order the correct part or product.

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