A double glazed IGU consists of two panes of glass separated by a sealed spacer bar, creating an insulating cavity that significantly reduces heat loss, external noise, and condensation. The cavity is filled with argon gas and sealed to ensure long-term performance and durability.
Clear float glass
Toughened safety glass (to BS EN 12150)
Laminated safety glass
Low-E coated glass
Obscure / patterned glass
Solar control glass
Configuration: Double glazed
Glass thickness: 4mm / 6mm (custom options available)
Cavity width: 12mm–20mm
Overall unit thickness: Typically 24mm–28mm (subject to configuration)
Gas fill: Argon (standard)
Spacer colour options: Silver, black, grey (subject to availability).
Enhanced thermal insulation – reduces heat transfer and improves energy efficiency
Argon gas filled cavity – improves insulation performance compared to air-filled units
Low-E coating option – reflects heat back into the building while allowing natural light in
Improved acoustic performance – helps reduce external noise
Warm edge spacer bars – minimise thermal bridging and condensation
Sealed unit construction – designed for long-lasting performance
What is an insulated glass unit (IGU)?
An IGU is a sealed glazing unit made from two or more panes of glass separated by insulating cavities to improve thermal and acoustic performance.
What is inside the cavities?
The cavities are typically filled with argon gas to reduce heat transfer and improve insulation.
What is the difference between double and triple glazing?
Double glazing uses two panes of glass, while triple glazing uses three panes, offering higher thermal and acoustic performance.
What is Low-E glass?
Low-E glass has a special coating that reflects heat back into the building while allowing natural light to pass through.
What thicknesses are available?
IGUs are available in various thicknesses depending on configuration and glass type, with custom options available.
Do IGUs reduce noise?
Yes, IGUs help reduce external noise. Acoustic performance can be further improved with laminated or mixed-thickness glass.
Do IGUs prevent condensation?
IGUs significantly reduce internal condensation but cannot eliminate it entirely, especially in high-humidity environments.
Is safety glass available?
Yes, IGUs can be supplied with toughened or laminated safety glass where required.
Can I choose different glass types?
Yes, options include clear, Low-E, toughened, laminated, obscure, and solar control glass.
What is a warm edge spacer?
A warm edge spacer reduces heat loss around the edge of the unit and helps minimise condensation.
Where can IGUs be used?
Suitable for windows, doors, rooflights, skylights, and both residential and commercial applications.
Are IGUs made to measure?
Yes, all IGUs are custom-manufactured to suit your size and performance requirements.
Low-E Glass – Improves thermal efficiency by reflecting heat back into the building
Argon Gas Filling – Enhanced insulation compared to standard air-filled units
Warm Edge Spacer Bars – Reduces heat loss and minimises condensation
Toughened Safety Glass – Increased strength and impact resistance
Laminated Safety Glass – Added security and noise reduction
Solar Control Glass – Reduces glare and limits solar heat gain
Obscure / Privacy Glass – Ideal for bathrooms and private spaces
Mixed Glass Thickness – Improved acoustic performance
Coloured Spacer Bars – Available in silver, black, or grey
