Andersen® casement windows feature decorative interior trim stops that provide a clean, finished appearance on the inside of the unit. These trim stops are individually replaceable. The steps below will help you figure out and order the correct replacement parts.
If you need assistance identifying your Andersen® products, visit our Identify Your Product 
pathway in the Andersen® Window and Door Help Center.
Andersen® 400 Series Traditional Casement Sill Stop
Andersen® 400 Series Contemporary Casement Sill Stop
Identification
Before ordering replacement stops for your Andersen® casement window, you'll need to gather a few key details.
Start by identifying the Series of your window using the Identify Your Product tool in the Andersen® Help Center. Once identified, stops for E-Series, A-Series, and 400 Series casement windows can be ordered.
Next, determine the handing of your window. If it’s a venting casement unit, check whether it’s left-handed or right-handed—this will match the handing of the stops. For example, a left-handed window will require left-handed sill and side stops. If you have a stationary casement or picture window, you’ll only need the window’s vintage and size to place an order. For more information, see Casement Window Unit and Replacement Part Handing.
The operator type also plays a role in selecting the correct sill stop. Windows manufactured between 1966 and 1982 used only straight-arm operators. After 1982, both straight-arm and split-arm operators became available. To confirm your operator type, refer to Operator Types Used on A-Series and 400 Series Casement Windows.
As of February 2022, Andersen® offers two stop styles: traditional and contemporary. Finally, consider the finish of the stop. Units made from 1966 to 1998 came with unfinished stops only, while painted options became available starting in 1999.
Replacement Parts
We offer a wide selection of replacement stops. Contact us to place your order, see Contact Andersen® Windows and Doors.
400 Series Casement Trim Stops
Installation
For detailed installation instructions, refer to Stop Replacement Instructions for Andersen® 400 Series Casement Windows.
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