An ever-growing range of glass products is facing architects, designers and project managers as well as architecture firms specifying products for building façades. The design team has several ways of expressing creativity and innovative options for achieving energy objectives. The way the building designs and works influences every decision. How do you know which glass products are right for your project with all the options available? Let’s look at key glass building design considerations.
When choosing glass to meet performance goals, there are several metrics to search for: § U-factor tests heat gain or loss in glass because of the difference in indoor-outdoor temperature. A smaller number means improved performance. U-factors for each climate are recommended.
Solar Heat Gain Coefficient (SHGC)
The SHGC tests how well a substance blocks sunlight-induced heat, and how well it can reduce sunlight. Measured in values between 0 and 1. The lower the SHGC it transmits, the less solar heat the more comfortable it occupies. The right SHGC will help maintain warm indoor air in cold climate environments and avoid expensive air conditioning in warm weather conditions.
Visible Light Transmission (VLT)
The visible light flowing through glass is a measure. The low-E goods are around 78 percent of the most visible light you can get. VLT can make daylighting simpler and can help offset electric lighting and refreshing loads if planned carefully. A higher VLT can improve lighting and a lower one can increase confidentiality. VLT management helps to avoid blindness.
Light to Solar Heat Gain Ratio (LSG)
Contrast the SHGC with the VLT. For low-E coatings the 2:1 LSG ratio can be reached. A higher LSG ratio will lighten the spaces and provide more accessible views.
For façades that have long sun exposure, Low-E glass façades can optimize direct sunlight with a limited effect on solar heat. Specific polymers can have a different effect on the glare and solar heat gains.
In terms of energy efficiency and workplace productivity, building orientation places an enormous role. In summer vs. winter, the solar heat gain and daylight can differ greatly according to sunlight path. Overlooking these materials, excessive heat gain or glare problems will result in energy efficiency and occupants ‘ comfort being compromised. The arch of the sun will have a different impact on each front:
- North: All-day indirect sunlight
- South: day solar susceptibility
- East: morning immediate light at low angles
- Western: afternoon direct light at low angles
For the long-term sun exposure façades, low-E glass facades will optimize natural light with minimal impact on the sun’s heat gain. Various coats could have a different effect on the glare and the rise in solar heat.
Samples to see
Samples of glass will allow you to see the final appearance of glass. The best way to view samples is outside on a rainy day. Tips to test samples:
- To guarantee desired color see three silver low-E coatings at a 40-or 50-degree angle.
- Continue to compare the color with the control sample.
- Five Never keep a picture in front of your nose, it’s not going to display color correctly. Holding 10 meters away from it.
- Switch a sample to see the glass ‘ reflectivity and the esthetics of the interior. To hotels and buildings in which night views are significant this is an important consideration.
- To take a good understanding of how light is going to affect the glass, visit the workplaces under different lighting conditions and times of day.
Glass experiments are presented with two backgrounds:
- A black backdrop behind a glass sample, the punched open window display replicates without turning on lighting.
- Towards the white background the reflected color is what you see in the bottle. An application where there is a white shadow behind a glass sample will display a nighttime application, or a condition in which the user sees through an all-glass corner height.
The color displayed and transferred in the glass may differ by a certain spandrel color or shade behind the glass. The choice of building cubicle floors or creating open interiors may influence the look of glass outside. Before defining all these variables (and more).
Many online resources are available to make the process simpler and guide you through the glass definition. Guardian Glass, for example, has developed easy to use, sophisticated glass and glazing analysis software, Glass Analytics. These online tools offer a complete series of technical and analytical reports demonstrating the advantages of high-level glass on construction fronts.
Speak early with your fabricator so that the design team and technical experts can predict your needs — they can be your glass partner while preparing your project.