Insulate a House With Natural Cork


Introduction: Insulate a House With Natural Cork

Insulating with natural cork a 70's house wall air gap was a challenging project saving thousands of Euro's. Our contractor suggested rebuilding all the interior walls!

Step 1: Get the Kork

Unless you have a cork tree, buy it from the spanish or portuguese dealers or collect wine bottle cap's

Step 2: How to Fill the Air Gap

You may drill 10cm holes in the wall and fill 'by hand' or use an air blower with some PVC pipes (10cm diameter)...

The key issue when using an air blower is the 'venturi' effect that helps the cork bits to be blown into the wall thanks to the main air stream.

Step 3: BLOW!!!

Step 4: YEEESSS!!!!!

Insulation improved confort and heating need reducing thermal conductivity down to 1/2... so CO2 not generated!!! It also improved the house acoustic isolation

In the attached infrared image you can appreciate 10cm against 14cm insulation... the lower the temperature, the fewer the looses.



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    4 Discussions

    Fantastic! Well done, a really innovative way of insulating your home. No disrespect meant here but the English is not isolate (which means to put separate or put on its own) it should be 'insulate' :) As stated, no disrespect meant as this is a truly fantastic project and I do love the way you used the blower.

    Good stuff :)

    Does the cork sag after a while? I guess it wouldn't be a hassle to top off with more after a year.

    1 reply

    Cork is an extremely resitant material. It could be outdoors for decades and it whould only 'loose' a 1mm layer. Some buildings have been isolated for decades (40 years) for fruit storage... and this kork was recycled for new buildings.

    I would say kork is more resistant than 'poliuretan foam'

    Now that would be a great way to reuse foam packing chips!