The Gentek 5100 and 1100 are both vinyl sliding patio doors, but they are not interchangeable. Compare their intended applications, listed sizes, colors, glass systems, screens, field reversibility, transoms, and hardware options before selecting a model.
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Gentek 5100 vs. 1100 Patio Door: Which Model Fits Your Project?
The Gentek 5100 and Model 1100 are both vinyl sliding patio doors with large glass areas and reinforced components. Their listed sizes, colors, configurations, options, and intended installation applications differ, so the correct choice starts with the opening—not with a feature count.
The Gentek 5100 patio door offers two- and three-lite configurations, custom sizing, white or beige colors, and options such as a ventilation foot lock and keyed exterior lock.
The Gentek 1100 patio door is specifically presented as a new-construction product with an integral mounting flange. It offers a broader exterior color palette and field-reversible operation on qualifying 80-inch-height units.
Gentek 5100 and 1100 Quick Comparison
| Comparison Point | Gentek 5100 | Gentek 1100 |
|---|---|---|
| Primary positioning | Sliding patio door with standard and custom-size options | New-construction sliding patio door with integral mounting flange |
| Frame and sash construction | Fusion-welded mainframe and sashes | Fusion-welded frame and sash |
| Reinforcement | Metal-reinforced sashes | Steel-reinforced vertical sash components |
| Listed configurations | Two-lite in 5-, 6-, and 8-foot widths; three-lite in a 9-foot width | Two-lite in 5- and 6-foot widths |
| Listed height | 79-1/2 inches standard | Verify current height options for the exact unit |
| Custom sizing | Gentek lists custom sizes as available | Confirm current manufacturing limits |
| Field reversibility | Not identified as a primary listed feature on the current page | Listed as field reversible on the 80-inch door height |
| Screen adjustment | Independent wheel adjustment at all four corners | Four-point roller adjustment |
| Colors | White and beige | Multiple interior colors and a broader exterior color collection |
| Transom | Confirm project-specific availability | Integral transom model referenced in 10-, 12-, and 14-inch heights |
| Special hardware | Ventilation foot lock, keyed exterior lock, and brass handset listed | Confirm current hardware packages for the exact configuration |
This table summarizes currently published information. Product options and regional availability can change; verify every quoted selection.
The First Decision: Installation Application
The strongest published distinction is that Gentek presents the Model 1100 specifically as a new-construction patio door. Its integral mounting flange is designed to be fastened and integrated with rough-opening flashing and the wall’s drainage plane.
The 5100 may provide greater sizing flexibility for projects involving existing openings, but “replacement” does not automatically mean the old frame can remain or that exterior flashing can be ignored. The actual 5100 frame, existing wall, cladding, sill, and approved installation method must be reviewed.
The 1100 May Be the Better Starting Point When
- The project is new construction
- The wall drainage plane is fully accessible
- An integral mounting flange is required
- A 5- or 6-foot two-lite configuration fits
- A specialty exterior color is desired
- A qualifying field-reversible unit is useful
- An integral transom configuration is being considered
The 5100 May Be the Better Starting Point When
- A wider 8- or 9-foot configuration is needed
- A three-lite patio door is preferred
- Custom sizing may be required
- White or beige meets the design requirements
- A keyed exterior lock is requested
- A ventilation foot lock is useful
- V-grooved glass or a brass handset is desired
Size and Configuration Differences
The 5100 has the broader published configuration range. Its two-lite designs are listed in nominal 5-, 6-, and 8-foot widths, while the three-lite design is listed at 9 feet. Gentek also identifies custom-size availability.
The 1100 is listed as a two-lite door in 5- and 6-foot widths. That smaller range may be entirely adequate for standard new-construction openings, particularly when its flange, color, reversibility, or transom features fit the project.
Nominal width does not establish actual frame size or clear passage. Use current size documentation for framing, egress, accessibility, furniture movement, and usable opening calculations.
Color Selection
The 5100 is currently listed in white and beige. This simplified palette works for many projects and can make selection straightforward.
The 1100 currently offers several interior colors and a substantially broader exterior collection, including dark and architectural colors. Availability and permissible interior-exterior combinations must still be confirmed.
Choose with current physical samples. Two products with similar color names can appear different because of substrate, texture, gloss, coating, manufacturing period, and light exposure. A coordinated color is not necessarily an exact laboratory match to siding or trim coil.
Comparing Insulating-Glass Packages
| Glass Component | 5100 | 1100 |
|---|---|---|
| Low-E glass | Available through BarrierXP packages | Available through BarrierXP packages |
| Argon gas | Listed with applicable BarrierXP options | Listed with applicable BarrierXP options |
| Spacer | Intercept Warm-Edge Spacer System | Super Spacer structural foam spacer |
| ENERGY STAR | Gentek states that many BarrierXP packages meet current requirements | Verify the exact package and climate-zone qualification |
Neither spacer name nor the presence of Low-E glass is enough to select the door. Compare whole-product NFRC U-factor, solar heat-gain coefficient, visible transmittance, condensation rating when available, and current ENERGY STAR certification for the exact size and configuration.
Field Reversibility Versus Ordered Handing
Gentek identifies the 1100 as field reversible on the 80-inch door height. This can provide valuable flexibility when the operating-panel location needs to change.
The 5100 is listed with left- or right-moving panel choices. Its current product page does not present field reversibility as a primary feature. Do not assume that the 1100 reversal procedure applies to the 5100.
Even when the 1100 qualifies for reversal, order the intended handing whenever possible. A field reversal adds panel handling, hardware reconfiguration, weather-seal checks, lock alignment, screen adjustment, labor, and inspection.
Comparing the Screens
Both models publish four-corner or four-point screen adjustment:
- The 5100 uses a fiberglass screen with an aluminum frame and independently adjustable wheels at all four corners.
- The 1100 screen is described as having four-point roller adjustment.
These systems allow the screen to be aligned within the tracks, but they do not make it a security or fall-prevention device. Gentek specifically warns that a patio-door screen will not prevent a child from falling through an open door and is intended to reduce insect entry.
Decorative Options
Both models offer decorative grids between the panes, which maintain smooth exposed glass surfaces for cleaning. Available patterns, profiles, colors, and compatibility vary by model.
The 5100 additionally lists V-grooved glass and an optional brass interior handset. The 1100’s broader exterior color collection may be more important when the patio door must coordinate with dark windows, siding, or architectural trim.
Decorative preferences should be documented with an elevation and physical samples. Confirm grid alignment when the patio door is installed near windows with their own grid patterns.
Performance Cannot Be Chosen From Features Alone
Fusion-welded construction and sash reinforcement are useful features, but they do not establish which door satisfies a project’s structural, air, or water requirements.
Before selecting either model, verify:
- Required design pressure or performance grade
- Exact tested size and configuration
- Air-infiltration performance
- Water-penetration resistance
- Structural test pressure
- Applicable product approvals
- Safety-glazing requirements
- Energy-code and NFRC requirements
- Coastal, high-wind, or multifamily project conditions
A rating for one size cannot automatically be transferred to a larger or custom-size door. Obtain current documentation for the proposed unit.
Installation Considerations
Whichever model is selected, the installation must address:
- A correctly sized and structurally sound rough opening
- Continuous, level sill support
- Sill-pan flashing with an exterior drainage route
- Jamb and head-flashing integration
- Correct frame anchorage and shimming
- Interior perimeter air sealing without frame distortion
- Operating-panel, roller, lock, and screen adjustment
- Clear exterior sill drainage
- Coordination with flooring, decks, landings, and cladding
- Pre-concealment documentation and final testing
The 1100’s integral mounting flange supports new-construction flashing, but it does not eliminate the need for a sill pan or complete water-management plan. For the 5100, use only the installation method approved for the supplied frame and project application.
Sales Tips for Comparing the Two Models
Start with non-negotiable project conditions
Identify the opening size, installation type, required performance, operating direction, and desired color before comparing optional hardware or decorative glass.
Do not call one model universally better
The 5100’s wider configurations and hardware options may suit one project, while the 1100’s mounting flange, exterior colors, transom, or reversibility may suit another.
Compare complete installed prices
Include glass, hardware, grids, flashing, fasteners, trim, delivery, lifting, installation, disposal, and finish restoration. Comparing door-only prices can produce a misleading result.
Verify all energy claims
Compare NFRC values for the exact units. Do not declare one door more energy efficient because it uses a different named spacer or because both are available with Low-E glass.
Show actual products and samples
A Suburban Wholesale product demonstration can help customers compare operation, screens, locks, grid profiles, colors, handles, and overall sightlines.
Popular Homeowner Questions
Which door is better for new construction?
The 1100 is explicitly designed and presented as a new-construction door with an integral mounting flange. The final decision still depends on size, performance, color, configuration, and wall requirements.
Which door is available in a nine-foot width?
Gentek currently lists the 5100 in a three-lite, nominal 9-foot configuration. Verify actual dimensions, panel arrangement, clear opening, and installation access.
Which model offers more exterior colors?
The 1100 currently publishes the broader exterior color collection. The 5100 is listed in white and beige.
Can both doors be field reversed?
Do not assume so. Gentek specifically identifies the 1100 as field reversible on its 80-inch height. The 5100 is offered with left- or right-moving panel choices; verify its exact ordering and installation requirements.
Which door is more energy efficient?
That cannot be determined from the series names alone. Compare whole-product NFRC ratings for the exact sizes, configurations, and glass packages proposed.
Does either screen provide security?
No standard insect screen should be treated as a security or fall-prevention barrier. The screen’s purpose is to help reduce insect entry while the door is open.
Certification and Installer Training
The AAMA Gold Label Certification Program provides third-party verification through independent testing and manufacturing quality-control inspections. Certification must be confirmed for the exact model, size, configuration, and performance requirements; it does not certify a field installation.
The FGIA InstallationMasters program trains installers working with windows and exterior glass doors. Training can support proper opening evaluation, flashing, anchorage, air sealing, operation, and maintenance, while the current Gentek instructions remain controlling for each model.
Final Selection Checklist
- New-construction or replacement installation method
- Actual opening and frame dimensions
- Two-lite or three-lite configuration
- Required clear passage width
- Operating panel and sliding direction
- Interior and exterior color requirements
- Glass package and verified NFRC values
- Current ENERGY STAR status
- Required structural, air, and water ratings
- Grid, glass, handle, lock, and ventilation options
- Transom requirements
- Field-reversal requirements
- Screen configuration and safety expectations
- Flashing, trim, and installation scope
- Delivery, lifting, and jobsite access
- Current warranty documentation
Compare Gentek Patio Doors With Suburban Wholesale
Suburban Wholesale can help contractors compare the Gentek 5100 and 1100 against real opening dimensions, configuration requirements, glass packages, color selections, performance needs, and installation conditions.
Review the Gentek 5100 patio door and Gentek 1100 patio door , or use professional quoting for a project-specific comparison.
Contractors can also access door installation training , request professional consulting , or request a quote .
Sources
- Gentek Building Products: 5100 Sliding Patio Door
- Gentek Building Products: Model 1100 New-Construction Sliding Patio Door
- Gentek Building Products: Patio Door Collection
- FGIA: AAMA Gold Label Certification Program
- FGIA: InstallationMasters Training and Certification Program
Product sizes, colors, configurations, hardware, glass packages, certification status, performance ratings, warranties, and installation requirements may change. Verify current Gentek documentation for the exact 5100 or 1100 unit, manufacturing date, opening, climate zone, and project location before ordering.
Contractor Notes
We‘re here to help.
Suburban Wholesale & Supply works with contractors, remodelers, builders, and property professionals across Davenport, Bettendorf, Moline, Rock Island, and the wider Quad Cities. If Gentek 5100 vs. 1100 Patio Door: Which Model Fits Your Project? affects a project you are pricing, our team can help compare product lines, confirm available options, and prepare a quote that fits the opening, exterior, or jobsite requirements.
Our counter and showroom teams support window, patio door, entry door, storm door, siding, trim coil, gutter protection, and accessory orders every week. We can talk through manufacturer differences, color and finish selections, installation details, lead times, and documentation so you can give your customer clear answers before the work begins.
For current availability, contractor pricing, product literature, or help matching this topic to a real project, contact Suburban Wholesale & Supply or send the details through our quote form. We will help you move from product research to an accurate material order with fewer surprises.
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