What is the insulation value of acrylic?

Acrylic compares well with other types of glass in terms of thermal insulation. In fact, acrylic has a higher insulation value than traditional glass. In this blog, we explain the insulation value of acrylic and what you can actually do with it.

Thermal conductivity of acrylic

To know the insulating effect of a product, you look at its thermal conductivity. This is also called thermal conductivity, recognisable by this symbol: λ. It shows how much energy (in watts) passes through a 1 m2 surface with a thickness of 1 m, per degree Kelvin or Celsius temperature difference between the two sides of the surface. Acrylic has a thermal conductivity of 0.19 W/(k.m). For single glass, that conductivity is 0.80 W/(k.m). The lower the conductivity of a plastic or glass type, the better the product insulates.

Good to know

The λ-value represents the insulation value of the material itself. The thickness of the material plays no role in this calculation. This means that if the material has a higher λ-value than another material, you can still achieve the same level of insulation with a thicker sheet.

Secondary glazing for better insulation

Insulation value of acrylic vs glass

Acrylic secondary glazing is a budget friendly alternative to double glazing. By mounting acrylic over your existing glass, you create stagnant air that insulates and also dampens noise.

Tip: Use cast acrylic, because it is easier to process than the extruded version.

The insulation value of acrylic secondary glazing is a bit lower than that of double glazing, but it is also a lot cheaper. Keep in mind that acrylic is not suitable for use in places where it is exposed to high heat. This is because this plastic cannot withstand this well. Looking for a glass substitute that is suitable for safety applications? Then polycarbonate is a popular alternative.

Insulation value of acrylic vs polycarbonate

The thermal conductivity of polycarbonate is 0.2 W/(k.m). This means that the insulation value of polycarbonate is almost as high as that of acrylic. Because polycarbonate is extremely strong, as well as heat and chemical resistant, it can be easily used as safety glass. A great solution to vandalism. A polycarbonate (front) window cannot be easily broken.

Secondary glazing for stained glass window with clips

Ordering acrylic online

Would you like to use clear acrylic as secondary glazing, or do you have another beautiful project using acrylic in mind? We have a wide range of acrylic in different sizes, colours and thicknesses. We cut the sheets to size for you, free of charge. You will receive your order within 48 hours.