Fiberglass Strength = Narrow Frame & Larger SqFt Glass

Architects, designers and homeowners who insist on contemporary elements can have both clean narrow sight lines and energy efficiency with Ultrex pultruded fiberglass windows and doors manufactured by Integrity from Marvin. Ultrex offers the narrow frames that contemporary home styles need to keep the original architectural elements looking strong and true for remodel projects, and the narrow frame+large sqft of glass area gives the new construction home maximum glass area to ultimately maximize views.
Square, true and beautiful is how Ultrex material stands up over time, thanks to the low thermal expansion rate of fiberglass. Expanding at virtually the same rate as glass, pultruded fiberglass is the material that is meant to weather extreme heat and storms to keep the entire window tightly sealed preventing leaks, glass seal failures and stress cracks.