Passive Walls opt

To achieve the passivhaus standard, passive walls need high levels of airtightness and insulation in order to eliminate thermal bridging and achieve the desired U value. The Irish standard for a traditional wall is a U value of 0.21 W/m2K whilst the Passivhaus standard is between 0.10 – 0.15 W/m2K.

To gain a deeper understanding of the passivhaus standard it is crucial to examine the difference with regards passive walls and traditional Irish walling systems; for this I have taken the two most common walling systems in Irish construction.

1. Block Cavity

2. Timber Frame

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