Made in USA

Fortis Series

Fortis Windows Seamlessly Combine State-of-the-Art Engineering with Elegant Design

Crescent proudly manufactures a wide selection of vinyl replacement windows, including the Fortis series, our mid-level option. Fortis windows provide the ideal combination of innovative engineering and stylish design, making them an excellent choice for homeowners throughout the country.

Stylish & Customizable Design

It’s equally important to choose replacement windows that will beautifully complement the style of the home and reflect the homeowner’s personal tastes. Fortis windows feature thick VyFoam™ insulation, but the frames are anything but bulky — in fact, the Fortis series features one of the thinnest, most aesthetically pleasing frame designs available today.

Homeowners will also love Fortis windows because they can customize them to suit their personal preferences. They’ll be able to select from a wide variety of window styles, including bay, double hung, garden, hopper, picture, and sliding. They can also choose from various exterior colors, which are applied using our exclusive VyCoat™ exterior coating system. With regard to the window interiors, homeowners can choose between two interior colors (white or beige). And, they’ll be able to select from various window grid designs such as flat and contoured grids as well as custom options.

To learn more about Fortis windows, as well as the benefits they offer to homeowners in your area, contact Crescent today.

Innovative Engineering

We offer Fortis windows as our mid-level series, but they’re far from average. They are equipped with a number of state-of-the-art engineering components, including the following, that set them apart from other home windows on the market:
Fortis windows are so strong and durable that they’ve achieved an R50 performance grade, a rating that considers factors such as structural performance, resistance to air infiltration, and resistance to water penetration. In fact, they’ve even been demonstrated to stand up against a 171-mph wind load, making them 180 percent stronger than the minimum requirement for the industry.
.02 Air Infiltration Rating
R50 Rating | 171 mph Wind Resistance
.23 U-Factor (with our most energy-efficient glass option)
.20 Solar Heat Gain Coefficient (varies by glass package)

Features & Options

The Fortis series offers exceptional energy efficiency and a range of versatile style options. Built with advanced VyFoam™ insulation and high-performance glass packages, these windows provide reliable thermal protection and enhanced comfort. With customizable designs and exterior color choices, the Fortis Series lets you improve both the look and efficiency of your home, all while maintaining long-lasting durability.

Welded corners for lasting strength

ThermaCore™ Reinforcement: Strength and efficiency built in

VyFoam™: Superior insulation and performance

Constant Force Balance: Smooth, effortless operation

Triple-Fin Weatherstripping: Advanced protection at every seal

Tilt-In Sashes: Effortless cleaning and maintenance

GLASS FEATURES

The Fortis Series offers four high-performance, energy-saving glass options so you can choose one that works best for your home and climate region. All of our ENERGY STAR® certified glass systems regulate your home’s temperature to help keep you cool when it’s hot and warm when it’s not.

Energy Saver R-5™ Glass

Experience exceptional energy efficiency with Energy Saver R-5™ Glass. Engineered to deliver the insulating power of a triple-pane window within a dual-pane design, this advanced glass system surpasses ENERGY STAR® standards. By reducing heat loss by up to 30%, it ensures your home remains comfortable year-round while significantly lowering energy costs.

VyGuard™ Laminated Glass

Designed for safety, sound reduction, and peace of mind, VyGuard™ laminated glass features a durable interlayer bonded between two panes of glass. This advanced construction helps protect against break-ins, reduces outside noise, and holds together if shattered—offering an added layer of security without sacrificing style.

Super Spacer® Warm Edge Spacer

Super Spacer® is an advanced, all-foam, no-metal insulating glass spacer designed to enhance thermal performance and durability. Its flexible construction reduces heat transfer, minimizes condensation, and improves sound insulation, ensuring long-term comfort and energy efficiency

TripleSilverLoE™ Glass

Engineered for exceptional energy efficiency, our TripleSilverLoE™ glass features three layers of invisible silver coating that work year-round to reflect heat, reduce glare, and block UV rays—all while letting in abundant natural light. It’s our most advanced option for comfort, clarity, and long-term performance.
EXTERIOR COLORS

VyCoat™ is an environmentally friendly, waterborne coating specifically formulated to coat PVC, offering long-lasting beauty and superior performance. It provides excellent abrasion and humidity resistance while maintaining vibrant color retention. VyCoat™ won’t peel, flake, or crack, ensuring durability in all weather conditions.

White
Beige
Cashmere
Ivory
Wicker
Sandalwood
Clay
Sandstone
American Brown
Universal Brown
Wedgwood Blue
Old World Blue
Forest Green
Sable
Bronze
True Black
Cranberry
Burgundy

Interior Paint

White
Beige

Locks

White
Beige
Brown
Oil Rubbed Bronze
Brushed Chrome

Elevate your windows with thoughtfully designed grid options that bring architectural interest and timeless appeal. Choose from a selection of classic styles and elegant contour profiles, from clean-lined simplicity to more intricate detailing.
For a truly one-of-a-kind look, custom grid designs are available upon request.

Grid Styles

Craftsman
Prairie
Colonial

Grid Contours

Flat
Contour

Choose from our textured glass options to add privacy and style to your windows and doors.
Standard obscured glass is available in both tempered and annealed, while our rain glass is offered in tempered only.

Obscured
Rain

Contact for a Enquiry

For more information about our Fortis Series. Please feel free to
Free Quote No Obligation
Fortis Interlocking Sill Sash provides added structural strength against heavy wind loads

Fortis sloped sill5 Degree Slope sill

Our carefully designed slope sill is the optimal angle for water runoff and to prevent air infiltration.

Fortis Gasket Close upQ-Lon Compression Gasket

Our Q-Lon, memory foam, compression bulb-seal gasket is the most energy-efficient weatherstripping currently used in the industry today. It adds barriers and diversions to help prevent water infiltration and drafts.

Fortis Sash interlockBottom sash interlock

Our innovative bottom sash interlock ensures a tighter seal helping to reduce drafts and decrease your energy bills. Provides structural strength during heavy wind loads by locking the sash in place.

Fortis Double Walled Sill DamDouble-walled sill dam

Tight-mortised cut, double-walled, sill-dam extends inside the jamb, eliminating the need to caulk an open seam.

 

VyFoam Close upR5 VyFoam™ in Frame & Sash

Our R5 foam-filled frame and sash insulation increase thermal efficiency, increases structural integrity, dampens sound, and reduces air infiltration.