I Need to Replace One Pane on My Andersen High Performance Windows

First Steps

• Like many residential windows, Andersens are installed in one large section. The window replacement products are also manufactured as a complete window with all panes included. You cannot order one spare part. You can order a replacement window package from the Andersen website specifically designed to replace broken windows. Order the proper model number, type and size of window for your project.

Approved Fasteners

• Consult the instructions Andersen provides for key instruction details, such as the proper fasteners for that window. Roofing nails or deck screws are approved fasteners for Andersens. These fasteners should be installed in every hole or every 6 to 8 inches, depending on the type of window you have. The minimum head size should be five sixteenths of an inch for both versions.

Adjustments

• Measure the window space and level or square the new frame as needed before installing the window. Start with the sill flashing if it also needs to be replaced. Otherwise, following the Andersen instructions carefully, center the window on the jamb shims and temporarily fasten it to the sill. This gives you the opportunity to shim the sides of the window and adjust the shims until the window is square within one eighth of an inch. Then you can fasten the window fully on all sides.

Flashing

• After the window is fastened in properly, you will need to re-install flashing over the sides to overlap the sill flashing. Seal the top flashing, install the drip cap, and cut the shims until they are level with the window. Seal all of the sides and insert the backer rod if needed. Afterwards, re-install the exterior trim and siding if necessary.