Infinity by Marvin Replacement Windows
Custom-built to fit your home exactly, in Ultrex® fiberglass that won't warp, rot, or fade. Engineered for everything a Minnesota year can throw at it.
A Better Way to Replace Your Windows
As an authorized Infinity by Marvin partner, we install replacement windows made from Ultrex® — a 100% fiberglass material developed by Marvin specifically to outlast vinyl, wood, and composite alternatives.
Geske's expert crew does it right all year round. Infinity windows are custom made to fit within your home's exact space. It's the easy, hassle-free way to enhance your home's comfort and appearance without the major disruptions of a full remodeling project.
Why Ultrex® Fiberglass
Most replacement windows are sold on the glass. We think the frame matters just as much — because in southwest Minnesota, the frame is what fails first. Ultrex® is built from 100% fiberglass strands, and the numbers behind it are the reason we chose it:
What Ultrex® Fiberglass Delivers
- 8x stronger than vinyl — with 17 tons per inch of load-bearing strength
- 87% less expansion than competing materials, so seals stay sealed through freeze and thaw
- An acrylic finish 3x thicker than other options — it won't crack, peel, or flake
- Withstands 48,000 hours of sunlight without fading or chalking
- Narrow frames, more glass — a bigger view from the same opening
Two Replacement Methods
Insert replacement fits inside the existing window frame that has been stripped of its sash. It's an economical method of improving operation and energy efficiency when the existing frame is sound, or when you want to preserve distinctive woodwork.
Full-frame replacement replaces the entire existing frame and sash — selected when the existing window has deteriorated or when you want a completely new window look.
Ready to see our windows in person? Visit our Marshall showroom or schedule a free in-home consultation.
Schedule ConsultationBacked by a Transferable Limited Warranty
Infinity by Marvin windows are covered by a limited warranty on the Ultrex® fiberglass frame, the glass, and the factory finish — and it transfers to the next owner if you sell your home. We'll walk you through the current warranty document in full at your consultation, so you know exactly what's covered before you buy.
Window Styles Available
- Double Hung & Single Hung
- Casement & Awning
- Slider
- Bay & Bow
- Round Top & Single Hung Round Top
- Picture & Special Shapes
Six Exterior Finishes
- Stone White & Cashmere
- Sierra & Pebble Gray
- Bronze & Ebony
Our Simple 4-Step Process
A Style for Every Opening
Ready to See What New Windows Can Do?
Free in-home estimate — no pressure, no obligation. Just an honest conversation about your home.