Businessman pointing to energy efficienc

Thermal Insulation

Specification & Technical Guide

What you should learn from this guide is that there are many products that can achieve the same thing.

 

In this guide we will show you how to compare different insulation products and options from a thermal insulation and costing perspective. 

 

Our technical experts are always ready to assist you in any way we can.  So speak to us if you need advice. 

Thermal Insulation (R-Values)

Thermal insulation values and calculations are critical when designing, specifying and buying insulation products. 

 

Extruded Polystyrene Insulation (ISOBoard & SANBOARD)  & Expanded Polystyrene insulation (PolyBoard) products have different insulation values and costs so here we will try to give you the tools and tables to compare the different products. 

environmental%2520Green%2520family%2520H

Thermal Insulation

K-Values

Thermal K-values, not to be confused with Thermal R-Values are simply shorthand for the thermal conductivity of specific materials.

Extruded Polystyrene

Insulation

Extruded Polystyrene insulation products like IsoBoard & SANBOARD have a K-Value of 0.024. 

Expanded Polystyrene

Insulation

Expanded Polystyrene insulation like PolyFloor, PolyWall & PolyRoof have a K-Value of 0.035

R-Value Calculations

Thermal R-Values are calculated the dividing the thickness of the material (in meters) by the K-Value of the material. So effectively, by changing the thickness of different insulation products you can achieve the same Thermal R-Value required.

Product Thermal R-Values By Thickness (mm)

ISOBoard & SANBOARD

(Extruded Polystyrene)

30mm - 1.250

35mm - 1.458

40mm - 1.667

50mm - 2.083

60mm - 2.500

70mm - 2.917

80mm - 3.333

90mm - 3.750

100mm - 4.167

110mm - 4.583

120mm - 5.000

150mm - 6.250

PolyFloor, PolyWall & PolyRoof

(Expanded Polystyrene)

30mm - 0.857

35mm - 1.000

40mm - 1.143

50mm - 1.429

60mm - 1.714

70mm - 2.000

80mm - 2.286

90mm - 2.571

100mm - 2.857

110mm - 3.143

120mm - 3.429

150mm - 4.286

Costing Extruded  & Expanded Polystyrene Insulation Options

If you know the insulation values required you can now compare the costs of the Expanded Polystyrene & Extruded Polystyrene Thicknesses to achieve that thermal value. 

FOLLOW US

  • Facebook - Black Circle
  • YouTube - Black Circle
  • Pinterest - Black Circle

www.polystyrene.co.za © 2016

by

Polystyrene Product Company (PTY) LTD