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November 15th, 2013

Airtightness in buildings

Why is air tightness important?
Air tightness plays a significant role in the energy efficiency of buildings.

Because:
– a link has been established between carbon emissions and global warming
the production of energy emits carbon
– the built environment contributes about 50% of carbon emissions
– heated/conditioned air leaking from buildings requires the use of additional energy to maintain temperatures
– By limiting the leakage of heated/conditioned air from buildings, it is possible to reduce energy consumption and costs.

The government has made commitments to reduce carbon emissions through the European Energy Performance of Buildings Directive (EPBD) and the Kyoto Agreement.

Part L is their method for addressing the conservation of fuel and power in buildings based on their overall ‘Emission Rate’ and as such places performance requirements on air tightness. Performance is proven through site testing of the completed building.

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