Secondary glazing acrylic 4 mm

Frequently Asked Questions

• How well does secondary glazing insulate against noise?

  Depending on the space between the acrylic sheet and the glass, secondary glazing can provide up to 26 dB of sound reduction. For this calculation, a 4 mm thick acrylic sheet was used.

• Which installation method should I choose?

  The mounting method with glazing clips is visually the most beautiful solution. With this method, dismantling the secondary glazing is also easy. Velcro is a mounting method that does not require drilling into the frame and makes mounting and dismantling very easy. If you are looking for permanent secondary glazing, or want to install it on the outside? Then a fixed installation is a good solution.

• How do I install my secondary glazing?

  We have created a handy step-by-step guide explaining step-by-step how to fit secondary glazing on the inside of a window.

• How should I measure my secondary glazing?

  Follow the measuring instructions to be sure which sizes to order for secondary glazing.

• What is the insulation value of secondary glazing?

  The insulation value is expressed by the U-value. It depends on the thickness of the material. Here, the lower the value, the better the insulation. For acrylic, polycarbonate and glass this is as follows:

  Single-glazing (4 mm) → U-value 5.7 W/(m^2*K)
  Double glazing (standard) → U-value 2.8 W/(m^2*K)
  Combination single-glazing (4 mm) with secondary glazing (4 mm acrylic) → U-value 2.7 W/(m^2*K)
  Combination single-glazing (4 mm) with secondary glazing (4 mm polycarbonate) → U-value 2.8 W/(m^2*K)

• Why should insulation tape be used with secondary glazing?

  This depends on the chosen installation method. Insulation tape is not possible with Velcro installation. When installing with glazing clips and screws, using insulation tape is possible and necessary. With these installation methods, the insulation tape ensures that the secondary glazing has an insulating effect.

• How do I ventilate secondary glazing?

  In some cases, it may be necessary to allow air to circulate between the window pane and the secondary glazing. You do this by leaving out a section of the insulation tape. We recommend leaving a 2 cm gap at the bottom left and right. This also applies, if you install your secondary glazing with Velcro.

• Why shouldn’t you clean secondary glazing with all cleaning products?

  Cleaning acrylic or polycarbonate with harsh detergents will damage the sheets. This can make your secondary glazing look dull. Check out our blog on how to clean acrylic or how to clean polycarbonate.