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What is the best glass for insulation?

What is the best glass for insulation?

If you want a window that insulates well, you definitely want one with low-E glass. This is glass with a low-E coating that helps reduce the UV light that passes through the window. You will also want a double-glazed window, one with two panes of glass—insulating glass.

What is the most energy efficient glass?

NaturalSun Low-E Insulating Glass allows the most light in, blocking just 69% of UV rays on double-pane windows and 74% on triple-pane windows, making it a better fit for the cold climates of the far north.

Which windows are the warmest?

According to, single-glazed windows with clear glass allow “the highest transfer of energy (i.e., heat loss or heat gain depending on local climate conditions) while permitting the highest daylight transmission.” No wonder such windows are practically extinct in residential architecture.

Are glass windows good for insulation?

If you have older windows, chances are they are aluminum framed windows with single-pane glass. Those are costing you money. Double pane windows are now the industry standard, they provide the space needed for the insulating gas in IGUs….Types of Insulated Glass Windows.

Gas Type Thermal Conductivity
Krypton .0093

Is thicker window glass better?

The extra thickness of double-strength insulated glass is far better than builder-grade single strength glass for a couple of very important reasons. Thick glass is far more durable and less likely to break, naturally enhancing the structural stability of our windows, greatly enhancing sound control.

Is thicker glass more energy-efficient?

Did you know: the thickness of glass only relates to the strength or resilience of a window and has virtually no impact on performance in energy efficiency. Thicker glass is typically used to protect against high wind loadings; it’s most commonly used in the upper levels of high-rise apartments or office buildings.

What kind of windows are best for cold weather?

For cold climates, you’ll want to choose windows that have wood, vinyl, fiberglass, or composite frames. Wood with vinyl cladding is ideal since it will hold heat best and the vinyl will protect the wood. Vinyl and fiberglass frames are also great, but fiberglass can be more expensive than vinyl and wood.

Who makes the most energy-efficient window?

Ply Gem® has raised the standard of efficiency with its high performance R-5 windows, which make them the perfect option for new home construction. These highly insulating windows make them one of the most energy-efficient windows on the market and they are ideal for cold and mixed climates.

How much is insulated glass cost?

Insulated glass typically costs about $10 per square foot and up, making it an affordable option for those concerned about their window glass price, and with a wide range of designs, it can satisfy any project.

What is the R-value of glass windows?


Type of Pane Winter Summer
Single Pane .9 .96
Double Pane with .25” air space 1.72 1.64
Double Pane with .5” air space 2.04 1.78
Triple Pane with .25” air space 2.56 2.27