When Should You Use Transparent Daylighting and When Should You Use Translucent?
Proper daylighting design requires use of both translucent vs. transparent daylighting. Glass or other transparent glazings provide a view of the outside, making the room feel larger and bringing the outdoors in. However, glass also brings in solar heat and causes glare, making the space uncomfortable and difficult to work in.
Translucent Daylighting Is the Most Cost Effective
Utilizing translucent daylighting is the most efficient and effective way to provide natural daylighting. Translucent panels are far more effective at blocking heat, providing savings in energy usage. Translucent panels also scatter the light, eliminating glare and reducing the amount of both artificial light and amount of daylighting needed, reducing both operating costs and installation costs. Translucent panels are cheaper to manufacture and install than glass, providing the best cost to usage ratio.
CPI Daylighting’s translucent polycarbonate, like their UniQuad or QuadWall products, provide highly diffused light without glare or solar heat gain. Diffuse light is like light on a cloudy day; small shadows, no spotlighting, low heat and easy on the eyes.
Transparent Daylighting Provides a View
Glass on the other hand provides a view. However the tradeoff is that it also delivers glare and solar heat gain. Glass is also expensive, and to get similar U-values, the glass has to be coated, triple pane, and insulated with argon gases, all adding to the costs. The seals will eventually break down, the gases leak out, and performance drops, and either replacements are expensive and difficult, or impossible.
But, there are areas that a view is necessary. No one wants to work in a building without a window or view outside. So the key is to balance the translucent vs. transparent daylighting in the design.
Translucent Vs. Transparent Daylighting Usage
For general use, walls at eye height (6 feet – 8 feet) should have some transparent glazing, allowing for views outside. In almost all other cases translucent daylighting provides the best performance at the best price. It really depends upon the usage: gymnasiums work best with translucent daylighting, and office buildings do well with translucent daylighting, as glare and heat can drop productivity quickly.