Glass
Solar control glass
Solar control glass is glass with a thin coating or body tint that lets in visible light while reflecting or absorbing part of the sun's heat. Its performance is given as a g-value, which is the share of solar energy passing through, calculated under BS EN 410.
Where does it work well?
South and west-facing frontages, large glazed cafes and showrooms, and shops where sun glare, overheating or fading of display stock is a problem that blinds or awnings alone will not solve.
Pros
- Reduces overheating
- Reduces load on air conditioning
- Can reduce glare
- Available in near-clear coatings
Cons
- Can tint or mirror the view slightly
- Costs more than clear glass
- Does not fully stop stock fading
How long does it last?
Typically as long as the unit it sits in, since many coatings are protected inside the cavity.
What should you check when buying?
Compare g-value and light transmittance together, because a darker glass is not always right for a shop window. View a sample outdoors to check the colour. In a conservation area, ask the planning team about tinted or reflective glass first.
Common questions
Will solar control glass stop my stock fading?
It helps but will not stop it. Fading comes from UV, visible light and heat together. Laminated glass blocks much of the UV, so combining the two gives more protection than either alone, although nothing removes the risk.
Will solar control glass make my shop darker?
It can, depending on the product. Near-clear coatings let through a high share of daylight, while tinted glass lets through less. Ask for the light transmittance figure and view a sample before choosing.