How can I super insulate my walls – part two: below ground level

With the foundations laid the next step was blockwork and insulation below ground level.

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The first of many deliveries from Travis Perkins. This time sand, cement and dense concrete blocks.

The blocks were stacked up around the site ready for laying.

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The existing brick walls needed to be cleaned to make sure the polystyrene insulation would fit tightly without any air pockets.

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The delivery of the Ibstock bricks from EH Smith.

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All the bricks had to be wheel barrowed through the site.

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5,419 bricks, 59 packs of Rockwool Cavity Insulation and sheets and sheets of Expanded Polystyrene Insulation (EPS).

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Most of the hard work was done by Mike, Jordan, Connor and Robbie. A well earned beer at the end of a tough day.

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Below ground we used polystyrene insulation.

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Cutting the expanded polystyrene (EPS 70)

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Dave laying the first block

Dave laying the first block

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Mike using expanding foam to fill the gaps

Mike using expanding foam to fill the gaps

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Damp Proof Course (DPC)

Damp Proof Course (DPC)

The Damp Proof Course was fixed to the existing walls with timber battens with a generous bead of silicone sealant applied to the back before being screwed into place.

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Robbie using the plate compactor or ‘wacker plate’

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