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Made in USAServing Johns Creek, Duluth, Alpharetta, Roswell, Milton, Cumming, Suwanee, Buford, LawrencevilleServing North Atlanta
470-533-0777

Fortis series

Our mid-range Vytex window: engineered for strength, designed for comfort.

Book a free estimate Compare Vytex series

Vytex · Our mid-range window

Engineered for strength. Designed for comfort.

Fortis pairs a sleek frame, which lets in more natural light, with VyFoam™ insulation in the frame and sash and ThermaCore™ reinforcement.

A mortise-cut, double-walled sill dam and an interlocking sill and sash keep out air and water. It carries an R45 performance grade.

Available styles

Bay, Double hung, Garden, Hopper, Picture, Sliding

Brick home with Fortis windows

Performance

Fortis

Our mid-range window

.06
Air infiltration (cfm/ft²)
R45
Performance grade
.22
U-factor with the most efficient glass
.20
Solar heat gain coefficient (varies by glass)

Ratings from Vytex. They vary with size, style and glass package; we confirm them for the windows in your quote.

Features

  • Sleek frame
    Sleek frameA slim profile for more glass and more natural light.
  • Welded corners
    Welded cornersFusion-welded frame and sash corners for lasting strength.
  • ThermaCore™ reinforcement
    ThermaCore™ reinforcementStrength and insulation built into the frame.
  • VyFoam™ insulation
    VyFoam™ insulationFoam fills the frame and sash chambers for better thermal performance.
  • Tilt-in sashes
    Tilt-in sashesBoth sashes tilt into the room, so you can clean the outside glass from inside.
  • Constant force balance
    Constant force balanceHolds the sash at any height and keeps it opening smoothly for years.
  • Triple-fin weatherstripping
    Triple-fin weatherstrippingThree fins at every seal block air and water.
Cutaway of a Fortis window frame showing foam insulation and seals

Inside the frame

5° sloped sill
Angled for water runoff and to help stop air infiltration.
Q-Lon compression gasket
A memory-foam bulb seal that springs back to keep out drafts and water.
R5 VyFoam™ in frame and sash
Foam fill adds insulation, stiffness and sound damping.
Bottom sash interlock
Locks the sash in place for a tighter seal and strength against wind.
Double-walled sill dam
Mortise-cut and extends inside the jamb, so there is no open seam to caulk.

Glass options

Every package is argon filled and ENERGY STAR® certified.

Energy Saver Plus™
Double pane, Low-E, argon filled
TripleSilverLoE™
Double pane with a triple-silver Low-E coating
Energy Saver R5™
Double pane with an added room-side Low-E coating
Energy Saver R5™ with TripleSilverLoE™
Our most efficient Fortis option
  • Energy Saver R-5™
    Energy Saver R-5™Double-pane glass with an extra Low-E coat on the room side, which Vytex says cuts heat loss by up to 30%.
  • VyGuard™ laminated glass
    VyGuard™ laminated glassAn interlayer between the panes adds security, reduces noise and holds the glass together if it breaks.
  • Super Spacer® warm edge
    Super Spacer® warm edgeAn all-foam, metal-free spacer that reduces heat loss and condensation at the edge of the glass.
  • TripleSilverLoE™
    TripleSilverLoE™Three layers of silver coating reflect heat, cut glare and block UV while letting light in.

Colors and finishes

White or beige interiors and 18 VyCoat™ exterior colors. Every glass package is ENERGY STAR® certified.

Lock finishes

  • White lock finishes
    White
  • Beige lock finishes
    Beige
  • Oil-rubbed bronze lock finishes
    Oil-rubbed bronze
  • Brushed chrome lock finishes
    Brushed chrome

Grid styles

  • Craftsman grid styles
    Craftsman
  • Prairie grid styles
    Prairie
  • Colonial grid styles
    Colonial

Grid types

  • Flat grid types
    Flat
  • Contour grid types
    Contour

Privacy glass

  • Obscured (tempered or annealed) privacy glass
    Obscured (tempered or annealed)
  • Rain (tempered) privacy glass
    Rain (tempered)

Product details from Vytex’s Fortis page. Swatches are a guide; we bring real samples to your estimate.

Other Vytex series

Our premium window

Potomac-hp

The strongest and most energy-efficient Vytex window we install, with VyFoam™ insulation in the frame and sash, a magnetic seal and a single-lever sash lock and tilt.

Air infiltration (cfm/ft²)
.01
Performance grade
R65
U-factor with the most efficient glass
.20
Explore Potomac-hp

Our entry-level window

Georgetown

A low-maintenance vinyl window with a slim sash, welded corners, triple-fin weatherstripping and a Duralite® warm-edge spacer, at a budget-friendly price.

Air infiltration (cfm/ft²)
.08
Performance grade
R40
U-factor with optional double-strength glass
.28
Explore Georgetown

Prefer more finish choices or a casement window? See our VinylMax lines

Free in-home estimate

Schedule a free estimate for Fortis windows

Choose a day and time on the calendar and we’ll come to your home to measure, show you samples and leave a written quote. There’s no obligation to buy.

  • About an hour
  • Measured in person
  • Written quote, no obligation

Book your appointment

Free in-home estimate · about 1 hour · we come to you

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