Insulating Glass Units

An insulating glass unit (IGU) commonly known as a sealed unit is the defining component in modern windows, doors and conservatories. It allows a building to resist the entry of wind and rain and also assists in the conservation of fuel and energy, which is one of the requirements of today's exacting standards. It also plays a part in the reduction of noise from outside sources.

Each IGU is manufactured to the very high standards required by BS EN 1279, and when installed and correctly maintained, should last 15-20 years or more; well in excess of any guarantee.

The harmonised standard, BS EN 1279 has been recently introduced, and all manufacturers of IGUs in Europe must either comply with its requirements or demonstrate that their standard of manufacture and test is comparable or better than the BS EN 1279 standard. The standard is in six parts which are as follows:

Part 1 - Generalities, dimensional tolerances and rules for the system description

Part 2 - Long term test method and requirements for moisture penetration

Part 3 - Long term test method and requirements for gas leakage rate and for gas concentration tolerances

Part 4 - Methods for test for the physical attributes of edge seals

Part 5 - Evaluation of conformity

Part 6 - Factory control and periodic tests

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