Integrity is a high quality fiberglass and wood window from Marvin. Marvin is at the top of the line for windows and doors and their Integrity product is no different. Fiberglass is a highly durable and stable material that is able to be painted and is low maintenance.


  • All Ultrex: Fiberglass exterior and interior. The best value if you want a low maintenance window that is strong, stable, and paintable. Factory finishes are available, and additional hardware options.

  • Wood Ultrex: Fiberglass exterior and wood interior. Unlike other brands, this is a solid wood interior not a thin veneer. This window combines the beauty of a traditional wood window, with the low maintenance of fiberglass. Like the All Ultrex line, the exterior can be painted. Factory finishes are available along with simulated divided lites and additional hardware options.

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