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We are a team with extensive knowledge and expertise across the glass, window and door industry

Achieving an exceptional 0.4 u-value, vacuum glass has been developed for applications for energy efficiency. The units each consist 2 panes of 4mm thick toughened glass separated by a 0.3mm central vacuum cavity.

Exceptionally thin and aesthetically pleasing units act as a highly efficient heat and sound insulator and with the added safety of toughened glass come with a 15 year warranty as standard.

In addition to all new-build projects, the advantages of vacuum glass allow for use in heritage, conservation and renovation installations where previously more traditional methods would be prohibitive.

This combined with our knowledge, values and commitment to quality and service mean we are with you every step of the way to advise and assist in achieving the required results.

What is 0.4 u-value vacuum glass

0.4 U-value centre paned vacuum glass is a superior glazing unit that has been designed and manufactured to achieve superior energy efficiency. It has been created with a unique combination of advanced technology and innovative design. The product is made up of two flat tempered glass panes that are separated by micro support pillars, sealed around the edges, and formed with a vacuum chamber in the cavity. This vacuum chamber is what makes vacuum glass stand out from other traditional double glazing units. The vacuum acts as an insulating layer, reducing heat transfer and providing exceptional thermal performance.

The vacuum chamber also acts as a barrier to prevent moisture and gas from entering the cavity, ensuring that the insulation performance of the glazing remains consistent over time. The use of tempered glass also provides exceptional strength, durability and safety, making vacuum glass suitable for a wide range of applications. These features make vacuum glass a unique and innovative product, offering outstanding energy efficiency and durability, as well as superior acoustic and environmental performance.

Vacuum glass specification

Vacuum glazing has a number of benefits that can improve the efficiency and performance of the windows in a period property with benefits including:

Fully tempered. Vacuum glazing is a fully tempered vacuum insulated glass retaining the safety features of tempered glass against impact. The surface stress of any position in tempered vacuum insulated glass exceeds 90MPa.

Energy Savings. The thermal insulation performance is 2 to 4 times better than insulated glass due to its’ high vacuum interspace that eliminates any gas heat transfer. By using high-performance Low-E coating, it also considerably suppresses radiation heat transfer and reduces the U-value to 0.4 W/(m2K).

Longevity. The life expectancy of vacuum glass exceeds 25 years. The flexible edge sealing materials avoid the sealing failure caused by the brittle edge sealing material. With the assistance of built-in high-efficiency getters, vacuum glass can sustain its superior performance against harsh environments and material ageing for many years.

Eliminates internal condensation. The high vacuum interspace of vacuum glass effectively eliminates the dew condensation phenomenon, while the outstanding thermal insulation performance ensures interior glass surface free of condensation even when the outdoor temperature falls to -40℃. 

Noise reduction. The high vacuum interspace of vacuum glass effectively blocks sound transmission. For every 5dB of noise increase, the effect on auditory experiences differs by 3 to 4 times. The weighted sound insulation measurement indicates that an outdoor noise level of 75dB, can be reduced by 41dB with vacuum glass, while the typical reduction by regular laminated glass is only 29dB. It has a remarkable soundproofing effect against medium and low frequency noise such as traffic and construction noise.

Flexibility. Factors such as geographical location, elevation, and installation angle do not affect the performance of vacuum glass. Thanks to the high vacuum interspace of the glass, there is no thermal expansion or contraction even if the elevation of the location where it’s used is significantly different from where it’s manufactured. The heat transfer coefficient of vacuum glass remains constant regardless of whether it’s mounted horizontally or with an angle, making it suitable for energy efficient roofing or slope installation.