Hybrid folding system
Aluminum reinforcement supports the structure while vinyl provides low-maintenance visible surfaces.
Win-Dor · Door
Win-Dor 3750 Folding Door
The WinDor 3750 folding door uses the same aluminum-reinforced vinyl approach as the sliding and multi-slide systems, but its panels fold and park at the side of the opening. This can leave most of the wall opening clear without building a pocket.
- Category
- Door
- Material
- hybrid, vinyl
- Brand
- Win-Dor
- Product type
- Collection comparison
Product overview
Enough detail to make a useful shortlist.
The door uses documented multipoint locking bars, Centor E3 hinges, multiple sill details, and keyed-access choices on eligible even-panel configurations. Panel parking, structural movement, weather exposure, and threshold detailing need to be resolved before ordering.
This page summarizes the documented product. Your final proposal should still name the exact size, configuration, glass, finish, hardware, and installation frame.
Multipoint locking
Stainless-steel multipoint locking bars are documented on active and inactive sashes.
Centor E3 hinges
The current page lists stainless-steel and bronze hinge finishes.
Detailed sill choices
Sleeper, ADA, flush, and subfloor-cutback details are published for multiple frame conditions.
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 system
- Material
- Aluminum-reinforced vinyl
- Operation
- Folding panels with side parking
- Locking
- Stainless-steel multipoint locking bars on active and inactive sashes
- Hinges
- Centor E3 in stainless-steel or bronze directions
Sill and frame
- Frame details
- One-inch and 1.375-inch nail-fin families are published
- Sills
- 0.75-inch sleeper, 1.5-inch sleeper, ADA, flush, and subfloor-cutback details
- Configuration resources
- Complete series plus individual panel-count drawings
- Final limits
- Confirmed from current manufacturer drawings and project performance requirements
Technical resources
Source documents, when you want the fine print.
Construction, hardware, hinge, finish, and sill details come from WinDor’s current 3750 folding-door page. Final shop drawings and project details control.
Common questions
What usually needs clarification.
Can the folding door have keyed exterior access?
The current page lists keyed access on eligible even-panel configurations. The exact panel count and hardware package must be confirmed.
Which sill is best?
The sill should be chosen from exposure, water control, accessibility, and floor-transition requirements. A lower sill is not automatically the right sill.
How much space do folded panels need?
That depends on panel count, width, and folding direction. The final elevation should show exactly where the stack parks and how it affects furniture and circulation.
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 Folding Door fits your opening.
Send the opening, project stage, and what matters most. We’ll narrow the configuration before asking you to choose finishes.