Solar Screen Fabric Guide for Commercial Spaces

Sunscreen fabric — also called solar screen, solar mesh or open-weave shading fabric — is the single most cost-effective way to cut cooling load, control glare and preserve an exterior view through a window. In commercial buildings, where glass facades can account for 40–60% of summer heat gain, specifying the right sunscreen fabric is not a decorative decision. It is an energy decision.

This guide explains what sunscreen fabric is, how openness factor changes performance, which openness to choose for which space, and which technical checkpoints to write into a procurement specification.

The short answer

Sunscreen fabric is a dimensionally stable, open-weave polyester or fiberglass mesh coated with PVC or a PVC-free compound. The weave leaves a controlled percentage of the surface open — the openness factor — typically between 1% and 5% for roller blind applications. Light and heat that pass through the open holes are diffused; light and heat that hit the yarns are reflected or absorbed. The result: daylight enters, glare is cut, UV is blocked, and the view out remains intelligible.

For most office and hotel applications, 3% openness is the default starting point. 1% is used where glare control is critical (west-facing facades, video-conference rooms). 5% is used where view preservation is the priority (lobbies, residential living rooms, retail).

What sunscreen fabric is made of

Two yarn systems dominate the market:

Polyester yarn + PVC coating. The workhorse construction. Polyester gives tensile strength and dimensional stability; the PVC coating gives UV resistance, color fastness and flame retardancy. Typical weight: 300–500 GSM. Price point: moderate. This is the fabric you will see in 80% of commercial roller blind installations worldwide.

Fiberglass yarn + PVC coating. Higher dimensional stability, better fire performance (fiberglass is inherently non-combustible), and a slightly more rigid hand. Used in large-format applications — atriums, skylights, facade screens — where sag over a wide span is unacceptable. Price point: 20–40% above polyester.

A third, growing category is rPET (recycled polyester) sunscreen, which uses post-consumer recycled yarns and carries GRS certification. Performance is equivalent to virgin polyester; the premium is typically 10–15%, and it is increasingly written into EU and US corporate procurement policies.

Solar screen fabric vs sunscreen fabric: what’s the difference?

Buyers often search for solar screen fabric and sunscreen fabric interchangeably — and for good reason. Both describe textiles engineered to filter sunlight rather than block it. In strict industry usage, the terms point to slightly different applications:

• Solar screen fabric usually refers to mesh-style textiles mounted on or near the glazing to absorb and reflect solar heat before it builds up indoors. The term dominates North American searches because exterior solar screens are widely used to cut cooling loads.
• Sunscreen fabric (also called sun-filtering or screen fabric) is the standard term for interior roller blind textiles with a defined openness factor — 1% to 10% — that manage glare and UV while preserving the outward view.

Functionally, the performance criteria overlap almost completely: openness factor, UV stability, colorfastness, fire certification and cleanability matter in both cases. For hotel and commercial projects, interior roller systems using sunscreen fabric deliver the same glare control and view retention with simpler maintenance than exterior installations. AWT’s JR screen series is engineered for exactly this duty — the section below explains how to choose the right openness factor.

Openness factor: the number that drives everything

Openness factor is the percentage of the fabric surface that is open hole rather than yarn. It is the single most important specification number, and it controls four performance dimensions simultaneously:

The trade-off is mechanical and predictable: lower openness gives more glare control and UV block but reduces view clarity and makes the room feel more enclosed. Higher openness preserves the view but lets more direct sun through. There is no “best” openness — only the right openness for the space.

Energy performance: what the numbers actually say

The most frequently cited independent study is the ESCORP / ES-SO research program, which measured real-world cooling energy savings from interior solar shading across 25 European countries. The headline finding for sunscreen-type fabrics:

Interior solar shading reduces cooling energy consumption by 63–97% in typical office and hotel rooms, depending on orientation, climate and glass type. The lower end of the range applies to north-facing rooms in mild climates; the upper end applies to west-facing rooms in Mediterranean and Middle Eastern climates with single-glazed or poorly insulated facades.

For procurement teams, the practical translation is:

• Payback period for a sunscreen roller blind system in a commercial building is typically 2–4 years, measured against the cooling energy saved.
• Peak load reduction (the number that matters for HVAC sizing) is 15–30% in office buildings with significant glazing.
• Daylight autonomy — the percentage of occupied hours where artificial lighting is not needed — increases by 20–40% compared to fully closed blinds, because sunscreen preserves usable daylight while cutting glare.

These figures are why sunscreen fabric is increasingly specified in green building certification programs. LEED v4 credits daylighting and energy performance; BREEAM credits solar shading explicitly; and the UAE’s Al Sa’fat green building code mandates solar shading on all west-facing facades in commercial buildings.

UV protection and interior preservation

UV radiation is the primary cause of fading in furniture, carpets, artwork and wood flooring. Sunscreen fabric blocks 95–99% of UV-A and UV-B radiation, depending on openness factor and coating thickness. For comparison:

• Standard clear glass transmits 60–75% of UV-A.
• Low-E glass transmits 25–45% of UV-A.
• 3% sunscreen fabric transmits less than 2% of UV-A.

For hotels and museums, this is a direct asset-protection argument. A west-facing hotel suite with no shading will show visible fading in upholstered furniture within 18–24 months. The same suite with 3% sunscreen fabric will show negligible fading over a 10-year refurbishment cycle.

Fire performance and certifications

Sunscreen fabric for commercial use must carry fire certification appropriate to the destination market. The three most commonly specified standards are:

• NFPA 701 (USA) — flame propagation test for textiles in public occupancies. Required by most US hotel chains and many Gulf state building codes.
• DIN 4102 B1 (Germany / EU) — low flammability class. The default fire class in Central European and many Middle Eastern specifications.
• BS 5867 (UK) — fire performance for curtains and drapery in non-domestic premises. Required for UK hospitality projects.

For environmental certifications, look for:

• OEKO-TEX Standard 100 — confirms the fabric is free from harmful substances. Required by most EU corporate procurement policies.
• REACH compliance — EU chemical safety regulation. Non-negotiable for EU projects.
• GRS (Global Recycled Standard) — required if the fabric claims recycled content. Increasingly specified in US and EU corporate sustainability policies.

AWT’s sunscreen fabric lines carry NFPA 701, DIN 4102 B1, OEKO-TEX Standard 100 and REACH certification as standard. GRS-certified rPET sunscreen is available on request.

Sunscreen vs blackout vs zebra: which for which room?

In practice, most commercial projects use a combination. A typical hotel specification pairs sunscreen (3%) in the day-use areas — lobby, restaurant, meeting rooms — with blackout in guest rooms. An office building typically specifies sunscreen across all workstations, with blackout in AV rooms and server rooms.

Width, weight and installation considerations

Sunscreen fabric for roller blinds is typically supplied in rolls of 200–2000 meters, with standard widths of:

• 200 cm (79 in) — narrow, for small windows and residential applications.
• 250 cm (98 in) — standard commercial width. Covers most office and hotel window widths without a seam.
• 300 cm (118 in) — wide, for large-format windows and facade screens.
• 320 cm (126 in) — extra-wide, for atriums and full-height glazing. Available from select mills.

Weight ranges from 300–550 GSM depending on openness factor and coating thickness. Lower openness (1%) requires more coating and is heavier; higher openness (5%) is lighter. The weight matters for two reasons: roll diameter (heavier fabric = larger roll = larger headbox needed) and motor sizing (motorized systems must be specified for the actual fabric weight).

What to write into a procurement specification

A complete sunscreen fabric specification should include:

1. Openness factor — e.g., “3% ± 0.5%”
2. Yarn type — polyester or fiberglass
3. Coating type — PVC or PVC-free
4. Weight — e.g., “380 GSM ± 10%”
5. Width — e.g., “250 cm minimum, 300 cm preferred”
6. Fire certification — e.g., “NFPA 701 Test Method 1” or “DIN 4102 B1”
7. Environmental certification — e.g., “OEKO-TEX Standard 100, REACH compliant”
8. Color fastness — e.g., “Grade 7+ on Blue Wool Scale”
9. UV block — e.g., “95% minimum UV-A block”
10. Sample requirement — e.g., “A4 sample of each colorway, with test reports”

AWT provides full technical data sheets, test reports and A4 samples for all sunscreen fabric lines. Contact us with your project requirements for a tailored specification.

Common questions

Visual guide: sunscreen fabric in real applications

The images below show sunscreen fabric installed in typical commercial settings — an open-plan office with west-facing glazing (left) and a hotel lobby with floor-to-ceiling windows (right). Note how 3% openness preserves the exterior view while eliminating direct glare.

Video: how sunscreen fabric reduces cooling energy

This animation demonstrates how open-weave sunscreen fabric reflects and absorbs solar heat while transmitting diffused daylight — the mechanism behind the 63–97% cooling energy savings measured in the ESCORP study.

Related resources

• ES-SO European Solar Shading Organisation — ESCORP energy savings research
• Intertek Textile Testing Services — independent lab for OEKO-TEX and fire certification
• AWT Screen / Sunscreen Series — full specs, color range and test reports
• AWT Certifications Page — download NFPA 701, B1, OEKO-TEX reports
• How to Choose Roller Blind Fabric: A Buyer’s Guide — the five key factors every B2B buyer evaluates
• Blackout vs Dim-out Fabric for Hotels — where to block light completely instead of filtering it
• PVC-Free & Recycled Roller Blind Fabrics — sustainable options for LEED and WELL projects

Related guides & fabrics

• Metallised Solar Screen Fabric Series — the AWT series behind this guide: specs, colors and roll data
• Browse All Fabric Series — 9 series and 160+ SKUs for every space