Custom Wood Round Top Windows

Unmatched Strength and Low Maintenance


A Round Top window is an exciting complementary piece, adding light and flair to windows and turning doors into grand entrances. Available in quarter-round, half-round and elliptical designs, their clean lines are designed to match perfectly with your Intergrity Wood-Ultrex windows and doors.


  • Low-maintenance exterior; rich pine interior
  • Available in quarter-round, half-round and elliptical shapes
  • Pairs well over Integrity doors and windows
  • Wide range of sizes

Integrity Wood Ultrex Features


Exterior Colours

The Ultrex patented finish process is three times thicker than competitive finishes to resist scratching and maaring. It also provides five times the UV resistance to protect against fading, chalking, streaking and cracking.

Custom Wood Windows
Stone White
Custom Wood Windows
Pebble Gray
Custom Wood Windows
Custom Wood Windows
Custom Wood Windows

Exterior finish samples are approximate. Please visit your local Integrity retailer to see actual color samples.

Ultrex Fiberglass

Our high-performance, proprietary Ultrex fiberglass delivers the strength and rigidity that outlasts and outperforms vinyl and aluminum. Plus, our patented finishing process yields a finish that is three times thicker than competitors that looks great for the life of the window.

  • Durable low-maintenance pultruded fiberglass
  • 8x stronger than vinyl
  • 9x less expansion and contraction than vinyl
  • Non-conductive and non-corrosive
  • Patented finishing process resists fading and cracking

Integrity Wood Ultrex Comparison

Interior Finishes

Wood-Ultrex windows feature solid-wood, pine interiors in a bare wood finish that is ready for painting staining or a factory-applied semi-gloss white paint.

Custom Wood Windows
Bare Wood (Pine)
Custom Wood Windows
Pine (Prefinished)

Wood is a product of nature and will vary in color, texture and grain. The wood options shown are to demonstrate the approximate look only. Please visit your local Integrity retailer to see interior color samples.

Grille Options

Grilles and Divided Lites

Grilles and divided lites are available in a variety of styles match the architectural design of your home.

Custom Wood Window Grilles & Divided LitesSimulated Divided Lites (SDL)

SDL are bars permanently adhered to both sides of the glass for a more authentic divided lite appearance both inside and out.

Custom Wood Window Grilles & Divided LitesSimulated Divided Lites with Spacer Bar (SDLS)

Spacer bar inserts are available with LoĒ3-366 glass to complete the appearance of individual glass panels.

Custom Wood Window Grilles & Divided LitesGrilles Between The Glass (GBG)

By inserting the grille between the panes of glass, you get the lite cut appearance you desire with the easy cleaning of a single pane of glass.

Custom Wood Window Grilles & Divided LitesWood Interior Grilles

Enjoy the warmth of real wood with an innovate concealed fastener system that allows for easy removal and cleaning.

Divided Lite Patterns

Integrity from Marvin offers a standard lite cut pattern for Round Top SDL/ Grilles and GBG divided lites. Lite cuts may not properly align in some mulitple assembly configurations — consult your local Integrity retailer for details.

Divided Lite Patterns



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Easy Wash Windows
Bi-Fold Doors
Lift & Slide Doors
Interior Finishes
Curb Appeal
Any Color You Want
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