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Engineering and design plastics Ltd, 84 High Street, Cherry Hinton, Cambridge, Cambridgeshire, CB1 9HZ, UK.

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POLYCARBONATE MULTI-WALL ROOFING SHEETS

 

Properties

  • Good mechanical strength
  • Extremely high impact strength
  • High light transmission
  • Good weather resistance
  • Thermal expansion 3mm/M
  • Easily cut using wood working tools
  • BS 476 Part 7 Class 1 (Self extinguishing)

Applications

  • Conservatories
  • Curved Roof light
  • Industrial Roof lighting
  • Secondary Glazing
  • Greenhouses
  • Covered Walkways
  • Swimming Pool Covers
  • Internal Glazing
 

Multi-wall Polycarbonate

Available with two, three and now five wall construction, Multi-wall sheet provides excellent thermal insulation, as well as a UV protected surface to resist yellowing. This makes it ideal for all kinds of roof glazing applications, from green houses and conservatories to factories.

Multi-wall sheet has a very high stiffness to weight ratio, it is very light, yet offers extremely high impact strength, minimizing the risk of breakage due to hailstorms or dislodged roof tiles. As the sheet weight is very low, support structures need not be as heavy as in the case of traditional materials. This in turn offers savings in structure and installation costs. 10mm and 16mm thick sheet can be cold formed to provide curved glazing for barrel vaults or canopies.

Glazing methods for polycarbonate differ from those normally used for glass, because of its greater thermal expansion and flexibility. Care must be taken that products used are compatible with polycarbonate (EPDM - or Neoprene rubbers, never plasticized PVC). Not all silicone sealants are suitable. Engineering & Design Plastics stock silicone sealant to BS5889 type A, which is compatible with polycarbonate.

Service Temperature
 Multi-wall Polycarbonate can be installed in a diversity of applications, with varying temperatures. The material’s mechanical performance is known to remain stable in prolonged service in temperatures ranging from –40 to +100 oC.

Installation
Applications of Multi-wall Polycarbonate must make adequate allowance for thermal movement, nominally 3.5 mm per metre.

Fire Performance
The fire performance of Multi-wall polycarbonate has been independently tested and the following classifications obtained (UK) BS476: Part 7: CLASS 1Y

Availability

10mm Clear & Bronze Twin-wall in sheet sizes ranging from 695mm x 2M to 2.1M x 7M

  • Light weight 1.7 kg/m2

  • Span : 700mm between rafter centres

  • Grade : Long life 10 Year limited warranty

  • Insulation value : K-value 3.2 W/m2.K

  • The minimum curve radius 1750 mm.

16mm Clear, Bronze and opal, Triple-wall in sheet sizes ranging from 695mm x 2M to 2.1M x 7M

  • Light weight 2.7 kg/m2

  • Span : 980mm between rafter centres

  • Grade : Long life 10 Year limited warranty

  • Insulation value : K-value 2.4 W/m2.K

  • The minimum curve radius 2800 mm

25mm Clear, Bronze, opal and Heat Guard Quin-wall in sheet sizes ranging from 695mm x 2M to 2.1M x 7M

  • Light weight 3.4 kg/m2

  • Span : 1200mm between rafter centres

  • Grade : Long life 10 Year limited warranty

  • Insulation value : K-value 1.6 W/m2.K

  • Not recommended for curved applications.
     

All the above data is based on marlon st Longlife multi-wall polycarbonate sheet manufactured by Brett Martin

Maximum length for delivery 4.0M

Engineering & Design Plastics stock a range of associated glazing products manufactured by Twin-fix and Exitex for use with multi wall polycarbonate which can in some circumstances be used with glass.
 

The information given here is believed to be correct, but completeness and accuracy are not guaranteed. The user shall be fully responsible for determining the suitability of products for the intended use.