Our Lifetime Limited Warranty

At Thermal Windows, we're proud of the quality of our products, installation and service.

If a problem occurs that is covered by our warranty, you have the comfort of knowing that you will be dealing directly with us, the manufacturer who is familiar with you and your order, not a factory in a distant state.

Since installation is a crucial part of window and door performance, our Lifetime warranties only apply to products installed by Thermal Windows, Inc. Contact us if you would like information on warranty coverage for products installed by you or a contractor.


Click on an image below to open a printable PDF.
Contact us for full details on Exclusions and Limitations.
Lifetime Limited warranty Sliding Glass Door warranty Vinyl window warranty Glass Breakage warranty
Note: The Glass Breakage warranty is an option, available at a nominal per-item charge.


Therma-Tru doors warranty information
Larson Storm Doors warranty information