https://ecoevo.com.au/is-blockwork-air-tight-core-filled-or-not/?utm_source=rss&utm_medium=rss&utm_campaign=is-blockwork-air-tight-core-filled-or-not Building Envelope Energy Efficiency Videos, focusing on passive house principles Sun, 30 Apr 2023 10:14:02 +0000 hourly 1 https://ecoevo.com.au/is-blockwork-air-tight-core-filled-or-not/#comment-159 Sun, 30 Apr 2023 10:14:02 +0000 https://ecoevo.com.au/?p=2254#comment-159 Great information on the masonry wall airtightness. I had the same issue when I installed 8 mm OSB as an air leakage control barrier. It leaked like a sieve. I resolved it with 3 thick coats of low voc plasterboard sealer. This sealed the product with minimal compromise to the vapour permeability.

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