What would you like to see?

What are you interested in?

Marvin Next Generation Ultimate Double Hung Round Top

The Next Generation Ultimate Double Hung Round Top will add traditional arching and elegant lines to your home or historic preservation project. These versatile windows can range from a large dramatic focal point to a subtle accent to a roof line to enhance your home design.

Where To Buy left arrow View All Round Top Windows
Features & Options
Arrow Left
Arrow Right


  • Multi-point Locking System: Revolutionary system locks directly into the jamb
  • Aluminum Inter-lock: Eliminates drafts and improves the overall structural performance
  • Vent Mode: Allows you to lock the window while it is open 4 inches.
  • Narrow Checkrail: A 1 15/16” checkrail provides a traditional look.
  • Complete Wood Interior
  • Shorter Sill Liner
  • 14 degree sill bevel
  • Request a Catalog

This product is CE certified.

How It Works

  • Auto-locking System: The first system of its kind. The window automatically locks when the window is closed. An audible “click” tells you it is locked.
  • Independent Sash Operation: Each sash can be locked while the other is open.
  • Ease of Operation: Improved balance systems make the sash operate smoothly at all sizes
  • Easy Tilt: Sashes can tilt in for easy cleaning.

Round Tops

Eyebrow Radius Operating Double Hung - A classic look with a gentle eyebrow radius. Beautiful as a standalone window or as part of an assembly. Available in 192 call number sizes.

Half Circle Transom - This simulated half circle transom window can be sized to stand alone or easily fit above a Double Hung window. Available in 12 call number sizes.

Eyebrow Transom - This stationary window is available as a transom or picture window. These windows are designed to complement the Next Generation Ultimate Double Hung window with complementary sizes and matching at springline. The transom is available in 20 call number sizes and the Picture is available in 55 call number sizes

Half Circle Radius Operating Double Hung - A dramatic window with a true half circle arch. The look gives a beautifully smooth transition from jamb to header. Both of the sash are operable. Available in 164 call number sizes.

Half Eyebrow Operating Single Hung - This striking window style adds elegant curve to a two wide window assembly. Available 189 call number sizes per shape.

Eyebrow RadiusOperating Double Hung

Eyebrow Radius
Operating Double Hung

Half Circle Transom

Half Circle Transom

Eyebrow Transom

Eyebrow Transom

Half Circle RadiusOperating Double Hung

Half Circle Radius
Operating Double Hung

Half EyebrowOperating Single Hung

Half Eyebrow
Operating Single Hung

Standard Specifications

  • One-lite Low E2 with argon insulating glass
  • Bare wood interior
  • Satin Taupe keeperless lock
  • Auto Lock – sash locking system
  • Independent locking sash
  • Vent Mode
  • Tiltable sash for easy washing
  • 14 degree sill bevel
  • DP 50 performance rating on most sizes

Marvin Corner Window

Learn More

Scenic Doors

Wide-Open Possibilities

Contemporary Studio

Contemporary Studio

Doors That Transcend Boundaries

Explore Doors