FACTS

There is no one perfect glazing solution for every building, or every orientation, hence the large array of products available! It can sometimes get a bit complex, but when in doubt remember:

• The lower the U value the better for reducing winter heat loss.
• The lower the SGHC the better for reducing heat gain in summer.
• The higher the VT the better for natural daylight.
• Compare different products on WERS website.
• Compare different products on WERS website.

BENEFITS

The benefits of double glazing are well documented and are not just about reducing energy consumption.

The main benefits of double glazing include:

• Reduce noise pollution into buildings.
• Reduce condensation build up on the inside of windows.
• Improved comfort levels.
• Reduce greenhouse gas emissions.
• Reduce running costs.

THINGS TO BE AWARE OF:

• Low-e glazing does not generally perform as well as double glazing, and is not normally a reasonable substitute.
• Choosing low SGHC can dramatically reduce the VT and the natural daylight in a building.
• Weight of larger DG panes of glass can prove a challenge during installation.