Technical Guide: Choosing the Ideal Solar Film Thickness for Commercial Buildings

In solar protection, a window film’s performance is not only defined by its optical and thermal properties but also by its thickness, measured in microns (µm). This technical aspect plays a crucial role in durability, heat reduction efficiency, and visible light transmission (VLT). This article provides a technical guide to selecting the optimal window film thickness for professional buildings such as offices, hotels, data centers, and sun-exposed façades.

Why Window Film Thickness Matters

1. Thermal Performance and Heat Reduction

Thicker films provide better thermal insulation and more effective solar heat gain reduction (SHGC). This translates to less heat entering the building, which is crucial in sunny regions. For instance, films ranging from 100 µm to 250 µm effectively block infrared radiation and improve indoor comfort.

2. Visible Light Transmission (VLT) and Clarity

There’s a trade-off: excessive thickness may reduce visible light transmission and impact glass clarity. The goal is to maintain adequate natural light (VLT between 40% and 70%) while ensuring effective solar protection.

3. Durability and Mechanical Resistance

Thicker films are generally more resistant to scratches, weather conditions, and temperature variations. A thickness of 200 µm to 300 µm ensures extended durability, especially in demanding outdoor environments.

Selecting the Right Thickness Based on Specific Needs

1. Offices and Open Commercial Spaces

• Technical Recommendation: Films 100 µm to 150 µm.
• Objective: Maximize natural light while reducing glare.

2. Hotels and Restaurants

• Technical Recommendation: Films 150 µm to 200 µm.
• Objective: Enhance indoor comfort by filtering excessive heat while maintaining natural light.

3. Data Centers and Server Rooms

• Technical Recommendation: Films 200 µm to 250 µm.
• Objective: Strengthened thermal protection to maintain stable temperatures and safeguard IT equipment.

4. South-Facing Façades and High Sun Exposure Zones

• Technical Recommendation: Multi-layer films up to 300 µm.
• Objective: Maximize UV blocking and heat reduction while minimizing unwanted reflection.

Benefits of a Thicker Window Film

✅ Superior Thermal Insulation: Reduced heat transfer, leading to lower air-conditioning costs.
✅ Glare Reduction: More effective infrared filtering, improving visual comfort.
✅ Increased Durability: Stronger mechanical resistance against UV rays and external damage.

Potential Drawbacks of Excessive Thickness

⚠ Reduced VLT: Excess thickness can make glass too opaque, limiting natural light.
⚠ Mirror Effect: Higher reflection may be inconvenient for south-facing façades.
⚠ Complex Installation and Costs: Thicker films require more technical installation, increasing costs.

Solar Screen’s Expert Recommendations

🔹 Detailed Building Analysis: Evaluating façade orientation, solar radiation, and climate conditions.
🔹 Real-World Testing: Measuring thermal and optical performance for different thicknesses.
🔹 Personalized Technical Support: Guidance on the Solar Screen range tailored to each project’s needs.
🔹 Advanced Installation Guides: Detailed technical support to ensure optimal and long-lasting installation.

Conclusion

Choosing the right window film thickness is a key technical decision influencing energy performance, light quality, and installation durability. By carefully assessing building characteristics and sun exposure conditions, installers can select the optimal film for each application.

Solar Screen offers tailored solutions and complete support.
📞 Contact our experts for personalized recommendations and in-depth technical assistance.

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