K2 Glass, a division of K2 Conservatories has a long history of expertise in manufacturing glass units for conservatory roofs. Products include our innovative Celsius glass, glazing for side frames and bevelled top lights and door panels.
In keeping with our commitment to continued innovation, K2 has introduced a stunning new range of ‘coated’ smart glass that’s perfect for use in conservatory roofs. Glass that keeps homes cool in summer and warm in winter, whilst offering other benefits such as minimal maintenance, ease of cleaning and much more besides.

Impressive technological features combined with a subtle blue tint in the glass helps ensure that unwanted glare is kept to a minimum allowing for all year round enjoyment of the conservatory. Other features mean heat from inside the home is reflected back into the property, whilst excessive solar heat is deflected away. Celsius is one of the few glazings on the market to offer this unique combination of heat reflection and thermal insulation.
Glass Temperatures
Year-round thermal comfort is a result of warm glass temperatures in the
winter, cool glass temperatures in the winter, cool glass temperatures in
the summer, and the blockage of oppressive solar heat heat gains.
Glass Temperatures - LoE140
Winter Night - 57degrees
Summer Day - 84 degrees
Solar Blockage - 75%
Thermal insulation
In an age where energy efficiency is paramount, our product outperforms standard glass units by 50%, thereby reducing potentially expensive heating bills.
Light Transmission
LoE-140 offers the best combination of aesthetic appeal along with
performance and occupant comfort.
Light Transmission - LoE140
Visible light transmittance - moderate - 40%
Solar Heat Gain Coefficient - 0.25
Fading Transmission - .16
Reflectance - Low
Color - Tinted
Winter Comfort - Good
Summer Comfort - Good
Sound Reduction
Dramatically improved sound reduction compared to 1" polycarbonate.