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Double Glazing
All our steel windows can be installed and supplied with sealed double glazed insulated units to improve thermal efficiency and, where required, comply with Building Regulations Part L (Conservation of Fuel and Power). Glazing is in accordance with BS 8000-7:1990
Due to the wide range of glazing option available (briefly highlighted below) consultation and agreement with the client is vitally important in achieving their thermal performance requirements whilst also achieving an aesthetically pleasing glazing.
Products and Glazing Services
Compliance to Building Regulation Part L 2006
Latticed Windows
Insulated units of between 14mm to 24mm thick
Glass options from - Annealed, Soft and Hard Coat Low-e, Toughened, Coloured, Frosted and Laminated Glass, Solar Control
Historic Glazing – Crown Glass
Insulating Gas – Air, Argon, Krypton and Xenon
Spacer Bars that match the RAL colour of the Slim lined Steel Frames
Application of thermal and solar control films
Longevity
The typical life expectancy of all double glazed units will be from 10 -25 years depending on the environment. We guarantee our units for 10 years.
Re-glazing
We also offer a re-glazing service to replace existing double glazed units that have either broken, been damaged or show signs of condensation on the inside cavity thats resulted from possible failure of perimeter seals.
Building Regulations Part L
Currently the required performance for windows are summarised in the following 4 building regulation Part L 2006 (conservation of fuel and power) documents:
L1A New Dwellings
L1B Existing Dwellings
L2A New Buildings other than dwellings
L2B Existing Buildings other than dwellings
The performance of windows being installed in the respective outlined can be summarised in the following table
Document |
U-Value
W/m2 |
Centre Pane Value
W/m2 |
L1A
(New Dwellings) |
2.2
(maximum avaerage) |
N/A |
L1B
(Existing Dwellings) |
2.0
(whole window) |
1.2 |
Extensions |
1.8
(whole window) |
1.2 |
Conservatories
(more than 30 sqm) |
2.0
(whole window) |
1.2 |
L2A
(New Non Dwellings) |
2.2
(maximum average) |
N/A |
L2B
(Existing Non Dwellings) |
2.2
(whole window) |
1.2 |
Extensions |
1.8
(whole window) |
1.2 |
Conservatories
(more than 30 sqm) |
2.2
(whole window) |
1.2 |
Typical Performance
The thermal performance (W/m2K) of double glazed units will vary significantly depending on the type of glass and insulating gas used as well the glass and spacer bar thicknesses. Typical performance values show below give an indication of how the requirements of Part L (above) can be achieved based on 22mm sealed units for Argon and Krypton gas.
Note: Insulated Panels consisting of Air do not meet current Building Regulations.
Inner Pane |
Outer Pane |
Cavity (mm) |
Config |
Gas |
Centre Pane
U-Value W/m2 |
Float Clear,
Annealed, 4mm |
Low-e Annealed, 4mm |
14 |
4-14Ar-4
22mm |
Argon |
1.19 |
Float Clear,
Annealed, 4mm |
Low-e
Annealed, 4mm |
14 |
4-14Kr-4
22mm |
Krypton |
1.12 |
Float Clear,
Annealed, 4mm |
Low-e Annealed, 4mm |
8 |
4-8Kr-4
16mm |
Krypton |
1.20 |
Also shown in the table above are the significantly thinner 16mm glazed units offered by Argon gas filled cavities to meet Building Regulation Part L 2006.
For further infomation on our double glazed units, or if you would like to know more on how we can help you comply with Part L please contact us.
General Thermal Performance Data for Double glazed units are shown in the downloadable documents below. (coming) |
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The Steel Window Company is a Trading style of Fabco Sanctuary Limited. Registered In England & Wales
No. 6552850. Vat No. 931 9093 17
© Fabco 2008 -- Unit 1, Hobbs New Barn, Climping, Littlehampton, West Sussex, BN17 5RE
--Tel: 01903 718 808 -- Fax: 01903 718 903 -- info@thesteelwindowcompany.com-- |
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