The Vytex Fortis Series
A genuinely well-rounded window: fusion-welded frames, Low-E insulated glass, and clean European-contoured sightlines, at a price that leaves room in the budget. It’s the series most of our customers land on once they’ve compared everything — enough performance and polish for almost any home, without paying for the flagship. Below are real Fortis windows in real Mid-Atlantic homes, plus the full brochure.
Why homeowners choose Fortis
Built to last
Specially formulated PVC with fully welded sash and frame — it won’t scratch, dent, rot, or ever need painting.
Easy to live with
Both sashes tilt inward, so you can clean the outside glass from inside the room. No ladders, no contortions.
Serious efficiency
High-performance Low-E glass packages, triple weatherstripping and multi-chambered frames keep drafts out and comfort in.
Curb appeal
Slim, European-contoured cove sightlines and a wide range of styles, colors and grid patterns — double-hung, slider, casement, awning, bay and more.
Fortis windows in real homes
Photography of actual Vytex Fortis installations — beige and white frames, interior and exterior, from brick colonials to bright nurseries and bay-window dining rooms. Click any photo to enlarge.
Product photography courtesy of Vytex® Windows. iowindows.com is an independent authorized Vytex dealer.
Fortis Series brochure
The complete Vytex Fortis guide — every window style, glass package, and performance detail, in one PDF (6 MB).
Ready to see your price?
Every window shown here is custom-made to your exact size and priced instantly in our configurator — no form, no sales call. Compare Fortis against the Georgetown and Potomac-HP series side by side, add professional installation if you want it, or order supply-only.