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Looking for Concrete Roof or Inverted Roof Insulation?


Concrete Roof Insulation is a building requirement in South Africa. Concrete roof insulation, also known as inverted roof insulation is a layer of insulation that is placed on top of the waterproofing layer on a concrete roof and then ballasted down with a filter fabric and then stone or paving.

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Brands & Options:


When it comes to concrete roof insulation, we have a number of great options for you!


PolyRoof Insulation (Expanded Polystyrene) - On Special Nationally


  • This is a very cost effective way to insulate your concrete roof slab!
  • Manufactured Locally In South Africa
  • Sold in 3m2 sheets
  • High Density & Highest Density Expanded Polystyrene Insulation Options
  • Delivered Nationally In South Africa & For Export
  • Shipped from Johannesburg, Cape Town, Durban, East London or Port Elizabeth


SANBOARD - Concrete Roof 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 - Concrete Roof 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:


All these products come in different board sizes. In order to compare actual costs of these products, 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 each board. This will give you the cost per m2 comparison.

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Polystyrene Product Company (PTY) LTD