Infinity from Marvin Fiberglass Replacement Windows & Doors – Attractive, durable, and low-maintenance, Infinity fiberglass replacement windows and doors are made completely of Ultrex – a pultruded fiberglass material.

• Strength – 8x’s stronger than vinyl; 3.5x’s stronger than wood/vinyl composites; 3x’s stronger than wood
• Low Maintenance – no sanding, scraping, or refinishing over time
• No Finishing Required – Ultrex on the interior and exterior
• Durability – won’t rot, warp, corrode, crack, dent, chalk, or fade
• Stability – minimal expansion/contraction is virtually the same as glass for tightly sealed units with consistently easy operation – won’t bend, buckle, twist, or warp in extreme conditions

Energy Efficient & Environmentally Friendly!

• Ultrex fiberglass is made partially from recycled materials
• The glass in Infinity products contains 15-33% recycled content
• Ultrex requires 39% less energy to produce than vinyl and 80% less to produce than aluminum
• The main ingredient used to make Ultrex fiberglass is glass, which is made from silica sand, an abundant natural resource

Replacement Window Choices

Exterior colors available in the following options:


Interior finishes available in the following options:



We have 30 different stains to match your existing interior woodwork!







Available in the following options: