What Is Openness Factor on Solar Shades?

Openness factor describes the approximate open area in a solar-screen weave. It is a starting point for comparing view-through and daylight, not a certified measurement of UV rejection, thermal performance, or nighttime privacy.

Comparing common openness labels

1%: A tighter weave with less view-through and generally stronger light control than a more open weave. 3%: A middle choice when the room needs meaningful glare management but some view remains desirable. 5%: Often more view and daylight, with less light control than tighter alternatives. 7% and 10%: More open choices that can preserve the view but may let more direct brightness through. These are category-level tendencies, not a ranked list of current Soluna fabrics: confirm which percentages are actually selectable in the live solar collection.

Why 3% does not equal 97% UV blockage

Visible openings and UV transmission are different measurements. Fiber composition, coating, color, weave, glass, and the manufacturer's test method influence UV results. It is incorrect to claim that every 3% solar screen rejects 97% of UV. Ask for tested UV values for the exact fabric and color before making a UV-dependent purchase. Similarly, an openness number cannot promise a specific indoor temperature drop.

How to choose for your room

Look at a sample from the seat or desk you use most, at the time direct sun hits the window. Check the daytime view, glare on screens, and privacy after dark with indoor lights on. A room intended for sleeping usually calls for room-darkening coverage instead. Read the solar collection overview, sunroom guide, and hot-climate guide to narrow the choice.