Hybrid construction
Rigid aluminum reinforcement and vinyl combine structural support with a low-maintenance exterior surface.
Win-Dor · Door
Win-Dor 3750 Sliding Patio Door
The WinDor 3750 sliding patio door combines rigid aluminum reinforcement with low-maintenance vinyl. Its 3-3/4 by 1-3/4-inch sash is visually coordinated with the 3750 multi-slide and folding systems, which matters on projects using more than one door type.
- Category
- Door
- Material
- hybrid, vinyl
- Brand
- Win-Dor
- Product type
- Collection comparison
Product overview
Enough detail to make a useful shortlist.
Use this system for familiar two- and multi-panel sliding layouts where everyday operation, a coordinated frame profile, finish flexibility, and stronger hybrid construction are priorities.
This page summarizes the documented product. Your final proposal should still name the exact size, configuration, glass, finish, hardware, and installation frame.
Coordinated sightlines
The published 3-3/4 by 1-3/4-inch sash matches the related 3750 multi-slide and folding systems.
Finish flexibility
Extruded, WinShield laminate, and coated exterior directions are documented.
Technical support
WinDor publishes performance sheets, handing information, elevations, shop drawings, and installation guides.
Photos + details
See the product, not a brochure thumbnail.
Open each view to inspect installation photography, product renderings, and construction details from current manufacturer materials.
Specifications
The facts that should appear on the quote.
Manufacturer-published dimensions and capabilities are maximums or examples unless stated otherwise. The ordered configuration controls.
Door construction
- System
- Aluminum-reinforced vinyl sliding patio door
- Published sash size
- 3-3/4 by 1-3/4 inches
- Sill finishes
- Clear Anodized or Bronze Anodized on documented two-track systems
- Handle styles
- Flush or optional Signature handle
Frame and installation
- Frame families
- Applied nail-fin and block-frame technical details are published
- Sill conditions
- Published sleeper-sill and subfloor-cutback details vary by frame
- Configurations
- Multiple two-, three-, and four-panel layouts in manufacturer drawings
- Final sizing
- Confirmed from current elevation and shop-drawing documents
Technical resources
Source documents, when you want the fine print.
Construction, finish, hardware, and technical-resource details come from WinDor’s current 3750 sliding-door page. Final shop drawings and performance sheets control.
Common questions
What usually needs clarification.
Why use the 3750 sliding door with other WinDor systems?
Its sash dimensions match the 3750 multi-slide and folding systems, creating more consistent sightlines when different door types appear on the same project.
What is WinShield?
WinDor describes it as a multi-layer foil laminated to white vinyl through an AAMA 664-21 approved application process. Jet Black and Bronze directions are documented.
Which frame and sill should I choose?
That depends on wall construction, replacement or new construction, water exposure, floor height, and flashing. The published details should be matched to the actual opening.
Related products
Keep comparing without losing your place.
Anlin Malibu Sliding Patio DoorA vinyl sliding patio door designed to coordinate with Anlin replacement window collections.View product 
Anlin Malibu Swinging French DoorA hinged French-door option designed as a companion to Anlin window systems.View product 
Anlin In-Glass Pet DoorA pet door built into the insulated glass of eligible Malibu sliding and swinging patio doors.View product Product imagery is shown for comparison. Final colors, glass, hardware, dimensions, ratings, warranty terms, and Arizona availability are confirmed from current samples and the written proposal.
Start with a clearer plan
See whether Win-Dor 3750 Sliding Patio Door fits your opening.
Send the opening, project stage, and what matters most. We’ll narrow the configuration before asking you to choose finishes.