Unsupported browser

For a better experience please update your browser to its latest version.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more


  • Comment

Triple-wall or multi-wall polycarbonate sheet is manufactured by an extrusion process, with integral webs between the walls. It is light in weight (3.2kg/m2), weather and impact resistant and light-transmitting. It is also an insulant; triple-wall 16mm thick sheet has a U-value of 1.7 W/m2K; the thicker 25mm sheet has a U-value of 2.4 W/m2K. Makrolon polycarbonate surfaces for external use have an integral coat which improves durability; surfaces for internal use are coated with a water-dispersant which disperses condensation to a film.

Polycarbonate is available in the traditional transparent sheet or in a white or bronze coloured translucent sheet which allows light through while giving privacy. Makrolon is available from Amari Plastics, tel 01932 835000.

The 16mm polycarbonate sheets were fixed to 32 x 32mm horizontal softwood battens using 3m clear vhb (very high bond) foamed acrylic adhesive. The adhesive is flexible enough to allow for the high levels of thermal movement (3mm per metre horizontally and vertically) of the sheeting.

Foamed acrylic adhesive has been in use on buildings for the last 15 years. It is suitable for situations in construction where the parts to be joined are relatively lightweight or only require restraint. Adhesives can be used to bond material to a framework and to bond stiffeners to material to prevent the deflection caused by wind.

  • Comment

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions.

Links may be included in your comments but HTML is not permitted.