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Looking For Surface Bed Insulation Options?


If you are looking to build a thermally efficient home or office then surface bed or under floor heating insulation is an important aspect of your build. This insulation layer is essential to ensuring that the building envelop is properly insulated from the ground up.

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  • Surface bed insulation is the layer of insulation that is placed above the compacted soil layer and below the concrete floor slab before it is cast.
  • The insulation layer prevents the cold ground soil from cooling the concrete floor slab.
  • It is a building requirement to install surface bed insulation when underfloor heating is going to be installed.


Brands & Options:


In terms of surface bed insulation you have the option of high density expanded polystyrene insulation (PolyFloor) or extruded polystyrene insulation (SANBOARD & ISOBoard)


PolyFloor Insulation (Expanded Polystyrene) - On Special Nationally


  • This is a very cost effective product for this application!
  • Manufactured Locally In South Africa
  • Sold In 3m2 sheets
  • High Density & Extra High Density Expanded Polystyrene Insulation
  • Delivered Nationally In South Africa & For Export
  • Shipped from Johannesburg, Cape Town, Durban, East London or Port Elizabeth


SANBOARD - Surface Bed Insulation (Extruded Polystyrene) - On Special Nationally


  • Manufactured Locally In South Africa
  • Sold In Various Board Sizes
  • Extruded Polystyrene Insulation
  • Delivered Nationally In South Africa & For Export


ISOBoard - Surface Bed Insulation (Extruded Polystyrene)


  • Manufactured Locally In South Africa
  • Sold In Various Board Sizes
  • Extruded Polystyrene Insulation
  • Delivered Nationally In South Africa & For Export


Cost Comparisons:


Extruded Polystyrene & Expanded Polystyrene Insulation come in different board sizes. In order to compare actual product prices, select the thickness of each board that gives you the thermal R-Value you need and then divide the cost of the board by the area of the board. This will give you the cost per m2 comparison.


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