Fiberglass Windows & Doors | Windows and Doors


The Elevate and Essential Collections from Marvin, are the exclusive fiberglass windows and doors of Marsh Building Products. Made from Ultrex and finished with a patented acrylic topcoat, these collections cannot be matched.

The Elevate Collection, previously known as Integrity Wood-Ultrex, has diligently chosen options and features that combine gorgeous, clean fiberglass exteriors with warm, inviting wood interiors. Giving you the beauty, strength, and durability you have come to expect!

The Essential Collection, previously known as Integrity All Ultrex, is the most streamlined of the three collections, making it easier to achieve the desired style and quality. With strong, durable fiberglass interior and exteriors this collection is stunningly beautiful and essentially maintenance free

These collections offers the toughest and most durable windows and doors on the market.  The Ultrex fiberglass composite is THREE times stronger than vinyl and EIGHT times stronger than vinyl/wood composites. With an expansion rate that nearly equals that of glass, Ultrex windows and doors remain stable even in extreme temperatures and offer a 38% longer useful life expectancy than vinyl window competitors.

The premium finish added to Elevate and Essential is a patented acrylic finish and is the first and only to be verified to any of AAMA’s 624-10 finish specifications.  It performs in all conditions and combats fading, chalking, peeling, and cracking.

These products meet or exceed Energy Star® Guidelines, so not only will these windows and doors reduce your impact on the environment, they will significantly reduce your heating and cooling bill over time.

See the Elevate and Essential Collections at any Marsh Building Products location.

Have questions?

    This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

    Marsh Building Products