Insulation ~ Cork

You knew there was a use for cork except for sealing wine bottles…

Cork is a natural and effective insulator. One disadvantage for the UK builder is the need to import cork from countries with the climate to grow it such as Portugal and other Mediterranean countries (China and India are now getting in on the act). Cork is fire-retardant, resists mold and is non-toxic.



  • Biodegradable.
  • Renewable.
  • Low embodied energy.
  • Excellent acoustic insulation.
  • Low impact production – few chemical additives.
  • Self-supporting. Cork boards do not slump and therefore maintain their structure and insulating properties over time.

Cork boards at 120 kgs/m2 have a thermal conductivity or K value of 0.04 W/m.K.
(Watts per meter Kelvin ~ a lower value is a better result)

As production is still relatively small scale, cost is relatively high – I guess! I’m currently unable to get UK prices for Cork insulation – anyone able to advise?

…if only we could collect our wine bottle corks and make our own…

Author: mbc

This is the story of MY barn conversion

11 thoughts on “Insulation ~ Cork”

  1. We’re just looking at flooring options and were thinking about using cork. I really like the look of the dyed cork tiles. We’re also looking at natural rubber.

    Good luck with drinking enough to line your walls with bottle corks!

  2. the other wood , a term used by the victorians to describe cork ,
    we are based in dublin and supply and install the most diverse range of cork flooring available , 7 designs , 9 sizes , vibrant colours , a floor to fit every situation,
    the best of thermal insulation

  3. I am curently importing cork in France and looking for parteners in UK.
    I’ve got only cork
    – in sheets for insulation; size: Thickness 40mm, 50mm, 60mm; lenght: 1m, width: 0,50m
    – in granulated.

    saling price are 300€ cubic meter with discount on quantity.

    If you need more details; I will be pleased to answer.


  4. just an extra comment
    sheets or boards are agglomerated cork, not expanded cork.

    It means density is higher; average of 175Kg per cubic meter.

    a lot easier to cut without dust and the surface is more finer.


  5. I am currently doing a barn conversion in Shropshire and want to use cork as a sustainable insulation on the walls. Please contact me if you can supply.

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