High-Quality Window and Door Installation Services

3750 Multi-Slide Door

bigger & stronger

Multi-Slide Door by Win-Dor is designed for next-level performance, offering exceptional energy efficiency, structural integrity, and long-term durability. What sets it apart? Size and performance. This door can go all the way to 10 feet tall. This is unheard of with vinyl doors! Or at least until Win-Dor came along. We use an exclusive blend of strong aluminum reinforcement with a low-maintenance vinyl capping. This hybrid construction delivers the best of both worlds: strength, longevity, and minimal upkeep, something you won't find with other manufacturers.

The 3750 Multi-Slide Door features a sleek 3 3/4" x 13/4" sash profile, matching our folding door system for a cohesive look throughout the home. Smooth operation comes standard. Our 17/8" rollers, paired with an extruded track system, ensures effortless sliding every time you open or close the door. Keep scrolling to learn more about our incredible performance ratings and features!

Folding Patio Doors Exclusively from

Value World Windows and Doors

Win-Dor's 3750 Folding Door system blends modern style with everyday functionality. While most manufacturers build their systems using only aluminum, vinyl, or wood, we take a different approach. By combining the strength of aluminum with the low-maintenance and energy efficiency of vinyl, we've created something truly special, offering the best of both worlds in one innovative system.

If you are replacing sliding glass doors, it’s likely because they no longer operate as well as they once did and don’t keep the heat or cold out as they should. ProVia’s vinyl sliding glass patio doors are tested against the most stringent industry standards for air and water infiltration, wind load resistance, ease of operation, and more. This means you’ll have lower heating and cooling costs, low maintenance, and increased comfort.

At the same time, our sliding patio doors offer the opportunity to upgrade the entry to your outdoor living space, with glass options that make your door more visually appealing. Our BetterVue® fiberglass mesh screens provide an enhanced view, increased insect protection, and improved airflow, while also shedding water and resisting dirt and grime.

With ProVia’s vinyl patio doors, you’ll have the assurance of knowing that most patio door systems offered not only will look great and function well, they will be ENERGY STAR® certified, providing optimal energy efficiency.