Double glazing offers year-round thermal advantages. Benefits include significant reduction in UV light and good retention of internal heat. As a bonus, it also dampens sound.

Low-E (the ‘e’ stands for emissivity) glass is a virtually invisible coating incorporated into your double glazing, improving the level of insulation in your home. The Low-E coating is applied to the inside surface of the exterior glass pane, protecting it from the elements. Look for products that are designed for New Zealand's conditions such as Solux-E by AGP which blocks excessive heat and also provides excellent light transfer and clarity for light, bright rooms.

A thermal spacer reduces heat transfer through the glass edge and improves the seal that is key to genuine double-glazing. A thermal spacer holds the two glass panes of your double- glazed windows and doors apart and creates a seal to hold in the gas fill. This keeps warm and cold areas separated, reducing heat loss around the outside of your glazing. The AGP System includes the ATS - Architectural Thermal Spacer for an airtight bond and ensures the best gas retention.

Inert gases such as argon and krypton can be used as an insulator in double glazing to create an additional barrier to heat loss and heat absorption, improving thermal performance. The efficiency of a gas fill is enhanced when paired with a thermal spacer.