What is the Difference Between Double Glazed and Triple Glazed Roof Lanterns?

The main difference between double-glazed and triple-glazed roof lanterns is the number of glass panes used within the glazing unit.

Double-glazed roof lanterns use two panes of glass separated by an insulating cavity, while triple-glazed systems use three panes for improved thermal insulation and energy efficiency.

Triple glazing generally provides lower U-values, better sound reduction, and improved indoor comfort throughout the year. Double-glazed roof lanterns are often lighter and more affordable, while triple glazed systems are commonly chosen for modern extensions where higher energy performance and reduced heat loss are important considerations.

Are triple glazed roof lanterns better than double glazed?

Triple glazed roof lanterns generally provide better thermal performance and acoustic insulation compared to double glazed systems.

The additional pane of glass and insulating cavity help reduce heat loss during colder months while improving overall energy efficiency within the property. Triple glazing can also help reduce condensation and improve indoor comfort in larger open-plan spaces or heavily glazed extensions.

Although triple glazed roof lanterns are usually more expensive, many homeowners choose them for long-term energy savings and improved year-round performance. Double glazed roof lanterns still remain a popular option for many smaller projects and standard residential extensions.

Do triple glazed roof lanterns reduce noise?

Yes, triple glazed roof lanterns can reduce outside noise more effectively than double glazed systems.

The additional pane of glass and insulating cavity help improve acoustic performance by reducing the amount of sound that passes through the glazing. This makes triple glazed roof lanterns in the UK particularly beneficial for homes located near busy roads, airports, town centres, or other noisy environments.

Improved sound insulation can help create a quieter and more comfortable indoor living space. Many modern roof lantern systems combine triple glazing with thermally efficient frames to provide both strong energy performance and enhanced noise reduction.