Focus on Fabric: Understanding Openness Factor

​​​​​​​When planning your shading system, choosing your fabric is a crucial step in the process. The right fabric does more than add aesthetic appeal, it contributes to the overall success of your shading system. Often times, it can be overwhelming to select the right fabric. From color to composition, there are several elements to consider. One of the most important features to consider is the fabric’s openness factor.

What is Openness Factor? The openness factor of a fabric refers to the percentage of the fabric weave that is not covered by thread. This percentage can range anywhere from 0% to 10%. Lower openness factors indicate a more tightly woven fabric. These fabrics create greater privacy while blocking sunlight from entering your space. On the opposite end, a higher openness factor indicates a looser weave which will allow for more sunlight and greater visibility.

Which openness factor should I choose? When selecting your fabric openness factor, consider the needs of the room and its occupants. Imagine your space has large open windows with abundant natural light and scenic views. If your goal is to darken the room by blocking out the light, a lower-openness factor fabric is the right choice to minimize light filtration. If occupants enjoy the natural light and need only the benefits of UV protection, a higher openness factor is the right choice. 

Light transmission isn’t the only factor to consider when selecting your fabric openness. The transparency and level of privacy should also be considered. As we noted, a lower openness factor features a tighter weave. This means that the visibility or view-through of the fabric will also be lower. If maintaining outdoor views is important to your occupants, you’ll want to make sure you choose a higher openness factor fabric which will better maintain your outdoor view. If privacy is important in the space, a lower openness factor is the right choice. Although fabrics with lower openness factors can darken a room and lend to greater privacy, it’s important to note that even a fabric with 0% openness isn’t necessarily opaque. For projects where you need total light blockage, select a black-out fabric, a distinction given to fabrics that are completely opaque and will block all light from entering the space. 
Above all, make sure to understand the needs of the occupants and how they will interact in the space. This will help guide your fabric selection and make sure your shading system is beneficial for those utilizing the space.