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Door and Window Warranty Service

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Concord Building & Design Center services the doors and windows that we sell. If you need assistance with parts for an older Therma-Tru door or need a brand-new Andersen window. We are here to help.


As a member of the exclusive Andersen Dealer Service Network (DSN), our service personnel have completed a factory training program and are authorized by Andersen Windows & Doors to perform service on their behalf.


Our service personnel have also received factory training from and are certified by JELD-WEN windows.


For all of our door and window products, we promise a timely response to all service issues.


If you have a problem with any of the products we have sold you, send a Service Request with a description of the product and the issue. Be sure to include your name and phone number.


Or, call one of our locations directly:

  • Concord Lumber & Building Center, Littleton, MA location: 978-486-9877

  • Concord Lumber & Building Center, Concord, MA location: 978-369-3640

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