Integrity by Marvin Windows and Doors

Integrity Fiberglass Patio Doors – Quite possibly the perfect building material.

Integrity Fiberglass Patio Doors Denver Centennial

Integrity Fiberglass Patio Doors in Denver. Enhance any room in your home!

Integrity Fiberglass Patio Doors – Wood Ultrex Sliding Patio Doors offer the perfect combination of beauty and toughness. Contemporary lines, a rich wood interior, and a large daylight opening are paired with the durability of an Ultrex fiberglass exterior for a sliding patio door that is as functional as it is beautiful.

The strength of Ultrex pultruded fiberglass is used in the sill to stand up to traffic and weather. This patio door comes standard with a top-hung screen that operates smoothly, day after day.

Ultrex: quite possibly the perfect building material.

Integrity windows and doors are Built to Perform® with Ultrex®, Integrity’s highly durable, state-of-the-art pultruded fiberglass with a patented finish that outlasts and outperforms vinyl, roll-form aluminum and vinyl/wood composites. They use Ultrex to manufacture windows and doors that endure the elements without showing age or wear!

Monster Truck Strong: One square inch of our state-of-the-art building material can support 34,000 lbs. That’s more than the weight of TWO of these giant monster trucks.

Tensile Strength: Stress-tested to the point of failure to avoid your stress being tested to anywhere near those levels.

Flexural Modulus Strength: Ultrex® is 8 times stronger than vinyl. Intgrity knows how far their material bends and flexes so you don’t have to worry.

Expansion and Contraction

Ultrex expands at virtually the same rate as glass which means these windows stay tight and true making them resistant to leaks, seal failures and stress cracks that can compromise energy efficiency and long-term performance.

Energy Star Qualified!

Integrity® from Marvin® Windows and Doors combines the low conductivity and superior performance attributes of Ultrex with a selection of energy-efficient glazing options to deliver ENERGY STAR qualified solutions. For a list of ENERGY STAR qualified products please visit Energy Efficiency.

French door elegance with sliding door practicality.

The Integrity® Wood-Ultrex Sliding French Door allows you to enjoy the elegance of a French door and the practicality of a sliding door. Wide stile-and-rail construction showcases the rich wood interior while Ultrex pultruded fiberglass provides a long-lasting, virtually maintenance-free exterior. Available in sizes up to a stunning 16 feet wide and 8 feet tall, this Sliding French Door opens new design possibilities.


  • Ultrex construction stays square and true.
  • Two and three-panel configurations up to 8’ tall.
  • Two-panel configurations available in special sizes to 1/64”.
  • Top-hung screen operates smoothly without jamming.
  • Two handle collections, five handle finishes, keyed and keyed-alike options provide design and functional flexibility.


Applied through a patented process, Integrity’s Ultrex finish is verified to the American Architectural Manufacturers Association (AAMA) 624-10 high performance voluntary finish specification. Ultrex’s mechanically bonded acrylic finish is 3x thicker than competitive finishes and provides a smooth, consistent, low maintenance and amazingly durable finish. Available in: Stone White, Pebble Grey, Cashmere, Bronze, Evergreen and Ebony. Stop by our showroon to see actual color samples.


Integrity’s exterior trim is made of Ultrex® fiberglass verses wood, vinyl or composite. Ultrex® pultruded fiberglass features our AAMA verified acrylic finish for low maintenance durability and superior aesthetics.

Interior Finish

The interior of the All Ultrex Series Sliding Patio Door features a durable low maintenance finish in stone white.

Performance Glass

Tempered glazing options are available. Tempered glass standard.

Specialty Glass

Integrity has several options of Specialty Glass available for unique project needs.. Integrity has several options of Specialty Glass available for unique project needs.

Standard Hardware

Sliding Patio Door handles are available in two hardware collections, Cambridge and Northfield. 32” Net Clear Opening handle is available for accessibility needs.


Integrity top hung door screens feature a durable low maintenance aluminum surround and non-corrosive charcoal gray fiberglass mesh for consistent performance.

We also sell Integrity Fiberglass Windows!