When choosing an outdoor roller shade, most people start by looking at color, size, or price. But the fabric specification can have an equally important effect on how the finished shade feels and performs.
One of the most useful specifications to understand is openness factor.
You may see outdoor screen fabrics described as 3%, 5%, 10%, or 30% openness. These numbers can look simple, but they influence the relationship between the shade and the space behind it — including visibility, daylight, airflow, privacy, and glare.
The important point is that openness factor is not a simple “higher is better” or “lower is better” specification. The right choice depends on how the outdoor space is used, how much sun it receives, how much privacy is required, and how important the outside view is.
Quick Answer: What Does Openness Factor Mean?
Openness factor is the percentage of open area within a woven shade fabric. A lower openness factor generally indicates a denser weave, while a higher openness factor indicates a more open weave.
For outdoor roller shades, a lower openness fabric can provide stronger visual screening and glare control, while a higher openness fabric can preserve more outward visibility, daylight, and airflow.
However, openness factor should not be confused with UV protection or total solar performance. Fabric construction, color, yarn, coating, and tested solar characteristics also affect how a shade performs.
- 3%: Denser screen for stronger privacy and glare control.
- 5%: Balanced option for shade, privacy, visibility, and everyday outdoor use.
- 10%: More open screen when airflow and outward visibility matter.
- 30%: Highly open screen for greater visibility and airflow in suitable exposed applications.
1. What Is Openness Factor in Outdoor Shade Fabric?
Openness factor describes how much of a woven screen fabric is physically open rather than occupied by yarn or other material.
In simple terms, imagine looking closely at a mesh fabric under a microscope. You would see solid yarn areas separated by tiny openings. The openness factor describes the proportion of those openings.
A 5% openness fabric, for instance, has a relatively tight screen construction compared with a 10% or 30% openness fabric.
As the openness percentage increases, the fabric generally becomes visually more open.
| Openness Factor | General Fabric Character | Typical Visual Effect |
|---|---|---|
| 3% | Denser screen | More filtered view and stronger visual screening |
| 5% | Moderately dense screen | Balanced shade, privacy, and outward visibility |
| 10% | More open screen | Greater visual connection and airflow |
| 30% | Highly open screen | Maximum visual openness among these options |
The percentage is therefore a useful starting point when comparing outdoor screen fabrics, but it should never be treated as the only specification that determines performance.
2. What Does Openness Factor Actually Affect?
Openness factor matters because the fabric is positioned between the outdoor environment and the people using the space.
Changing the weave changes how much visual connection, daylight, and air movement can pass through the screen.
Outward Visibility
Higher openness generally allows more of the exterior environment to remain visible through the screen.
This can be valuable on balconies, terraces, restaurants, patios, and other spaces where maintaining a connection with the garden, street, pool, or landscape is important.
Daylight
A more open fabric generally allows more daylight to pass through the weave.
A denser screen can create a more filtered and visually controlled environment.
Airflow
Fabric openness can also influence how air moves through a screen.
More open fabrics generally allow greater airflow than dense screens, although actual airflow depends on the entire installation, wind direction, surrounding architecture, screen dimensions, and fabric construction.
Privacy
Lower openness can make it more difficult to see through the fabric, especially during bright outdoor conditions.
However, privacy is affected by more than the percentage alone. Lighting on both sides of the screen, viewing angle, distance, fabric color, and the surrounding environment all matter.
Glare
A denser screen can help reduce the intensity of direct light and glare entering the shaded area.
This is particularly relevant for west-facing patios, balconies, restaurants, and outdoor seating areas exposed to strong afternoon sunlight.
3. Does a Lower Openness Factor Mean Better UV Protection?
Not necessarily.
This distinction is important when evaluating outdoor shade fabric.
Openness factor describes the geometry of the weave. It does not directly tell you the percentage of UV radiation blocked, the solar transmittance, or the amount of heat entering the space.
Two fabrics with the same openness factor can have different solar performance because their construction may differ.
Important variables include:
- Yarn construction
- Fabric density
- Fabric color
- Coating or surface treatment
- Material composition
- Solar reflectance
- Solar transmittance
- Tested UV performance
Important Specification Note
Do not interpret “5% openness” as “95% UV protection.”
The two measurements describe different properties. Openness tells you about the open area of the weave. UV protection must be evaluated from the fabric's actual tested performance.
This distinction is particularly important for commercial projects where fabric selection needs to be based on the complete system specification rather than a single percentage.
4. 3%, 5%, 10%, or 30%: Which Openness Factor Should You Choose?
BESITSOL's Motorized Windproof Outdoor Roller Shade offers multiple solar screen openness options so the fabric can be selected according to the intended balance of shade, privacy, visibility, and airflow.
| Openness | Visual Openness | Privacy | Glare Control | Airflow | Good Starting Point For |
|---|---|---|---|---|---|
| 3% | Lower | Higher | Higher | Lower | Strong sun, privacy-focused areas |
| 5% | Moderate | Moderate-High | High | Moderate | General outdoor living and balanced shade |
| 10% | High | Lower | Moderate | High | View-focused outdoor spaces |
| 30% | Very High | Lower | Lower | Very High | Visibility and airflow-focused applications |
These descriptions should be treated as a starting framework rather than a universal performance ranking.
For a final project selection, the fabric should be evaluated together with the opening size, orientation, surrounding architecture, intended use, and local environmental conditions.
5. What Does 3% Openness Fabric Feel Like?
A 3% solar screen has a relatively dense weave compared with more open screen options.
The visual effect is more controlled. Bright outdoor details become softer behind the screen, and the opening can feel more private and visually protected.
This can be useful when the main concern is:
- Strong sunlight
- Afternoon glare
- Visual privacy
- A more filtered outdoor view
- Reducing visual exposure from neighboring properties
For a west-facing balcony or exposed patio, a denser screen may create a more comfortable visual environment than a highly open mesh.
However, if preserving a wide landscape view is the primary objective, a denser screen may feel more visually restrictive.
6. What Does 5% Openness Fabric Feel Like?
A 5% openness screen sits closer to the middle of the spectrum.
It can provide a useful balance between solar filtering and visual connection with the outdoor environment.
This makes 5% a practical starting point for many outdoor living applications where users want:
- Filtered sunlight
- Reduced glare
- Moderate privacy
- Some outward visibility
- Comfortable airflow
It can work particularly well for patios, balconies, covered terraces, outdoor dining areas, and side screens where the user does not want a completely solid visual barrier.
The actual result will still depend on fabric color, lighting conditions, viewing distance, and the surrounding architecture.
7. What Does 10% Openness Fabric Feel Like?
At 10% openness, the screen becomes noticeably more visually open.
More of the landscape remains visible, and the space can retain a stronger connection with the surrounding environment.
This can be useful when:
- Outward visibility is important
- The outdoor view is a major design feature
- Airflow matters
- The space should feel visually open
- Privacy requirements are moderate rather than high
For a terrace overlooking a garden, pool, city skyline, or landscape, a more open screen can preserve the sense of being outdoors while still providing a degree of solar filtering.
8. What Does 30% Openness Fabric Mean?
A 30% openness screen has a substantially more open weave than 3%, 5%, or 10% screen fabrics.
Its main advantage is the stronger visual and airflow connection with the environment.
BESITSOL positions its 30% Solar Screen as a more open-weave option for applications where visibility and airflow are particularly important, including exposed or high-rise environments.
This makes it a different design decision from simply choosing “more shade.”
The question becomes:
How Much Visual Openness Does the Space Need?
If the objective is to maintain a strong connection with the outside environment, a higher openness fabric may be more appropriate than a dense screen.
However, higher openness also means less visual screening. It should therefore be evaluated carefully when privacy or strong glare control is a primary requirement.
9. Openness Factor vs UV Protection vs Solar Heat Control
These terms are often used together in outdoor shading, but they describe different characteristics.
| Specification | What It Describes | Why It Matters |
|---|---|---|
| Openness Factor | Open area within the fabric weave | Helps determine visibility, daylight, and airflow characteristics |
| UV Protection | How effectively the fabric reduces UV exposure | Relevant to people, furnishings, finishes, and material protection |
| Solar Transmittance | Solar energy transmitted through the fabric | Important for heat and solar-control analysis |
| Solar Reflectance | Solar energy reflected by the fabric | Influences how much solar energy is reflected away |
| Glare Control | Reduction of visually uncomfortable brightness | Important for comfortable outdoor use and visual quality |
| Privacy | Degree of visual screening | Important for balconies, patios, hospitality, and neighboring properties |
This is why choosing an outdoor screen fabric should not be reduced to one number.
Openness factor is one part of the fabric specification.
10. Does Fabric Color Change How Openness Looks?
Yes.
Two fabrics with the same openness factor can create noticeably different visual experiences because color affects contrast, perceived brightness, and how clearly the outside environment appears through the screen.
Dark Fabrics
Dark screen fabrics can create stronger visual contrast with bright outdoor surroundings and may allow the outside view to feel more defined.
Light Fabrics
Lighter fabrics can create a brighter appearance and may reflect more visible light. Depending on the environment, they can also change the perceived softness of the filtered view.
Why Physical Samples Matter
A screen viewed on a monitor cannot reproduce the exact outdoor experience.
Natural sunlight, wall color, flooring, furniture, landscaping, and the brightness on the opposite side of the fabric all influence how the final material looks.
Before finalizing a custom shade, evaluate physical samples in the actual installation environment.
For a practical fabric-selection process, see: How to Test Awning Fabric Samples in Real Outdoor Light .
11. How to Choose the Right Openness Factor for an Outdoor Roller Shade
Instead of starting with a percentage, start with the way the space needs to perform.
Step 1: Identify the Main Sun Problem
Is the screen mainly intended to reduce strong midday sunlight, late-afternoon glare, or general solar exposure?
A stronger glare-control requirement may point toward a denser screen.
Step 2: Decide How Important the View Is
If the outdoor view is one of the main reasons for the space, consider whether a more open fabric would preserve that connection better.
Step 3: Determine the Privacy Requirement
Balconies, patios facing neighboring homes, restaurants, and hospitality spaces can have very different privacy requirements.
Step 4: Consider Airflow
For exposed outdoor spaces, airflow can be an important part of comfort. A more open fabric may provide a different balance than a dense screen.
Step 5: Compare Physical Samples
Do not make the final decision from the openness percentage alone.
View the fabric in daylight, from the seating position, and from the outside of the opening.
Step 6: Confirm the Complete Roller Shade System
The fabric is only one part of an outdoor roller shade. Opening dimensions, mounting surface, side guides, cassette, bottom rail, motor, wind exposure, and installation method also influence the finished system.
12. Openness Factor by Outdoor Application
| Application | Primary Concern | Openness to Consider | Why |
|---|---|---|---|
| West-Facing Patio | Afternoon glare | 3%–5% | Denser screening can provide stronger visual filtering |
| Residential Balcony | Privacy + view | 3%–5% | Balances screening with outdoor visibility |
| Outdoor Living Area | Balanced comfort | 5%–10% | Maintains a connection with the surrounding space |
| Poolside Terrace | View + airflow | 5%–10% | Helps preserve the open outdoor environment |
| Restaurant Terrace | Comfort + visibility | 5%–10% | Supports outdoor dining without creating a solid barrier |
| Exposed / High-Rise Space | Visibility + airflow | 10%–30% | More open fabric can suit applications where visual openness is important |
These are starting points, not fixed specifications. Solar exposure, orientation, wind conditions, privacy requirements, fabric color, opening dimensions, and project use should all be reviewed before final selection.
13. Why Openness Factor Matters for Motorized Windproof Roller Shades
For a motorized outdoor roller shade, fabric selection becomes part of a larger system decision.
BESITSOL's Motorized Windproof Outdoor Roller Shade uses guided side channels to keep both fabric edges controlled as the screen moves.
The system is designed for patios, balconies, pergola sides, hospitality terraces, and commercial openings. Its fabric directions include solar screen options with different openness levels, as well as blackout and clear TPU options for project-specific requirements.
The product page currently lists 3%, 5%, 10%, and 30% Solar Screen options. The selection is intended to be made around the required balance of shade, privacy, visibility, airflow, and project use.
| Fabric Direction | Primary Design Question |
|---|---|
| 3% Solar Screen | Do I need stronger screening and glare control? |
| 5% Solar Screen | Do I want a balanced everyday outdoor screen? |
| 10% Solar Screen | Do I want more visibility and airflow? |
| 30% Solar Screen | Is maximum visual openness and airflow more important? |
The system also allows the screen to be raised when an open view is preferred and lowered when sun, privacy, or exposure becomes a problem.
For wind-exposed projects, final performance should be evaluated from the complete system configuration. Finished size, mounting surface, fixing method, installation quality, and site conditions all matter.
14. Openness Factor Is a Starting Point, Not the Whole Fabric Specification
If you remember only one thing from this guide, remember this:
Do Not Choose Outdoor Shade Fabric by Openness Alone
The openness factor helps you understand the relationship between the fabric and the outside environment. But a complete fabric decision should also consider:
- Openness factor
- UV performance
- Solar transmittance
- Solar reflectance
- Fabric color
- Glare requirements
- Privacy requirements
- Airflow
- Viewing distance
- Outdoor exposure
- Project application
A 3% screen may be the right starting point for one patio and the wrong choice for another. A 10% screen may be ideal for a view-focused terrace but provide less privacy than a homeowner expects.
The right fabric is therefore not the one with the “best” openness percentage.
It is the fabric whose characteristics match the way the space will actually be used.
15. Outdoor Shade Fabric Selection Checklist
Before finalizing a screen fabric, review these questions:
- ☐ How strong is the direct sunlight?
- ☐ Is afternoon or west-facing glare a major concern?
- ☐ How important is the outside view?
- ☐ How much privacy does the space require?
- ☐ Is airflow important?
- ☐ Is the space residential, hospitality, or commercial?
- ☐ What is the primary viewing distance?
- ☐ What fabric color will be used?
- ☐ Have physical samples been tested outdoors?
- ☐ Has the fabric been evaluated from both sides?
- ☐ Does the fabric suit the roller shade system?
- ☐ Has the mounting surface been reviewed?
- ☐ Has wind exposure been considered?
- ☐ Are the final dimensions confirmed through project review?
Frequently Asked Questions About Openness Factor
What is openness factor in outdoor shade fabric?
Openness factor is the percentage of open area within a woven shade fabric. A lower openness factor generally indicates a denser weave, while a higher openness factor indicates a more open weave.
Is a lower openness factor always better?
No. A lower openness factor can provide stronger visual screening and glare control, while a higher openness factor can preserve more outward visibility, daylight, and airflow. The better choice depends on the application.
What is the difference between 3%, 5%, 10%, and 30% openness?
The percentages describe the relative amount of open area in the fabric weave. Lower percentages generally create a denser screen, while higher percentages provide a more open visual and airflow connection with the environment.
Does openness factor equal UV protection?
No. Openness factor and UV protection are different specifications. Openness describes the geometry of the weave, while UV performance depends on the actual fabric construction and tested characteristics.
What openness factor is best for outdoor roller shades?
There is no universal best option. Consider 3% or 5% when privacy and glare control are priorities, and consider 10% or 30% when outward visibility and airflow are more important. Final selection should be based on the actual project.
Is 5% openness good for outdoor living spaces?
A 5% solar screen can be a practical middle-ground option where users want filtered sunlight, moderate privacy, reduced glare, and some outward visibility.
What openness factor is best for maintaining a view?
Higher openness generally allows a stronger visual connection with the exterior. However, fabric color, lighting, viewing distance, weave construction, and surrounding conditions also affect how clearly the view appears.
Does fabric color affect how openness looks?
Yes. Fabric color affects perceived brightness, contrast, glare, and the appearance of the view through the screen. Physical samples should therefore be evaluated in real outdoor light before final selection.
Final Takeaway: Choose the Openness Around the Space, Not the Number
Outdoor shade fabric is not simply a choice between light and dark, open and closed, or high and low percentages.
The openness factor helps determine how the screen interacts with light, airflow, privacy, and the outside view. But the best result comes from evaluating the entire fabric specification together with the space itself.
Start with the sun.
Then consider the view.
Then determine privacy and airflow requirements.
Finally, compare physical fabric samples in real outdoor conditions.
For a motorized outdoor roller shade, the fabric should also be evaluated together with the complete guided system, opening dimensions, mounting conditions, wind exposure, and intended use.
Explore Outdoor Roller Shade Fabric Options
If you are selecting an openness factor for an exterior screen, explore the BESITSOL Motorized Windproof Outdoor Roller Shade .
The system offers multiple solar screen openness options, including 3%, 5%, 10%, and 30%, allowing the fabric to be selected around the desired balance of shade, privacy, visibility, and airflow.
The guided side-channel system keeps both fabric edges controlled while the motor adjusts the screen according to changing sunlight, privacy, and outdoor use.
For custom projects, approximate opening dimensions, mounting information, intended application, and a site photo can be provided for project review before final production dimensions are confirmed.
About This Outdoor Shade Fabric Guide
This guide was developed around practical outdoor shade planning considerations used when selecting screen fabrics for balconies, patios, pergola sides, hospitality terraces, and commercial outdoor openings.
Fabric openness should be evaluated as one part of a complete shading specification. Actual performance depends on fabric construction, color, solar characteristics, opening dimensions, orientation, mounting conditions, surrounding architecture, wind exposure, and intended use.
For custom motorized roller shade projects, BESITSOL recommends confirming the final fabric, color, system configuration, mounting method, and production dimensions during project review rather than relying on a percentage or online image alone.
Physical fabric samples are particularly useful because outdoor light, surrounding surfaces, and viewing distance can change the perceived appearance of the screen.
