Marvin Ultimate Double Hung Next Generation Round Top

The Ultimate Double Hung Next Generation 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.

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  • DESIGN VERSATILITY: With an array of simulated divided lite patterns, interior and exterior color options, ten hardware finishes, and hundreds of roundtop sizes.
  • EXCLUSIVE AUTOLOCK: Activates when the sashes are closed, locking the window.
  • ALUMINUM INTER-LOCK: Eliminates drafts and improves the window’s overall structural integrity.
  • NARROW CHECKRAIL: Provides a sleek aesthetic to maximize daylight opening while maintaining historical accuracy.
  • SASH BALANCE SYSTEMS: Enable smooth operation even at the largest sizes.
  • FIRST-RATE ENERGY EFFICIENCY: Meet ENERGY STAR standards in energy efficiency with multiple glass options for various regions, climates and weather needs.
  • EXPANSIVE SIZES: Larger than 5’ wide by 10’ tall.

This product is CE certified.

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

  • SUPERIOR WEATHER PERFORMANCE: The window’s performance ratings are top in class, including LC-PG50 on most sizes, CW-PG30 to CW-PG50 on most sizes, and IZ3 certified coastal options.
  • TRADITIONAL SILL BEVEL: The 14-degree bevel provides optimal water management while maintaining a classic look.
  • DURABLE EXTERIOR CLADDING: Made with the industry’s highest level of certification, AAMA 2605, extruded aluminum and backed by a 20-year warranty against chalking and fading.
  • TILT/WASH MODE: Allows for easy access to the exterior glass for cleaning and maintenance.
  • CERTIFIED PERFORMANCE: Available with certified performance on sizes larger than 5' wide by 10' high. Optional commercial (CW) performance on sizes up to 5’ wide by 10’ high.

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