Warmth is a valuable commodity and creating a second barrier to the elements is an ideal way to reduce wasteful thermal heat loss. In fact, there are few better ways.
Are you losing heat? Reports show that up to 10% of heat is lost through your windows. Installing secondary glazing adds an extra barrier to prevent heat loss.
As secondary glazing is often fitted with a 150mm – 200mm cavity from the primary window, the air filled cavity acts as an insulator. The creation of an insulating layer of air is as important to the retention of energy as the fitment and seals. With the right glass, the result can be a reduction in heat loss by as much as 65 percent.
For thermal insulation, low-E glass is often the best choice because the glazing has been designed and engineered to provide:
- the very best single glazing insulation
- maximum energy conservation
- an extremely discreet installation
- an environmentally friendly solution
- an affordable investment with quick returns
Low-E glass has a transparent coating that is much thinner than a human hair. This coating has been specifically designed to reflect heat back in to the room, reducing heat loss through the window and energy consumption. Studies suggest that secondary glazing installed to single glazed units save up to £75.00 per annum.
Secondary Glazing is the product of choice for traditional buildings and properties, listed buildings and conservation areas, maintaining their appearance, character, integrity and value.
The thermal image below displays houses which have secondary glazing installed. Secondary glazing has been installed to the windows within the white box. As these windows are purple in colour we can see that less heat is escaping through the treated windows.
Our test results highlighted that a timber window has a U Value of around 4.7 W/m2K. A sealed secondary glazed unit can yield a lower U Value of 0.97 W/m2K.
Secondary glazing has been installed to the windows within the white box. As these windows are purple in colour we can see that less heat is escaping through the treated windows.
What is a U-value?
U-values measure how effective a material is as an insulator. U-values are a measure of the rate of transfer of heat through a material. The lower the U-value the better the material is at retaining heat. The installation of secondary glazing acts as an insulator barrier and can reduce heat loss through the window by up to 65%.
The installation of secondary glazing can:
- Reduce heat loss
- Minimise draughts
- Reduces energy bills
- Decrease noise levels by up to 80%
- Enhance a buildings security
If you are unsure what glass type is most suitable for your application please speak with our customer care team who will be able to offer more information.
St John’s Institute – London
St John’s Institute of Larcom Street, built at the very beginning of the 20th century under the auspices of Rev. A W Jephson, vicar at the nearby St John the Evangelist Church.
Secondary Glazing for Hotels – Good Night Guarantee
A national hotel chain has installed Granada’s acoustic secondary glazing to guarantee a good night’s sleep and decrease noise levels by up to 54 decibels.
Apex Temple Court Hotel – London
Apex Temple Court Hotel situated in the centre of London approached Granada with noise and thermal issues. Granada often hear of these issues within the hotel & leisure sector as hoteliers wish to improve a guests stay and ensure a peaceful night’s sleep.