Airtightness systems and testing

According to the UK Building Research Establishment, a house built to be reasonably airtight and to the current ROI building regulations (5 cubic meters/h/sqm at 50Pa) consumes 40 per cent less energy than a house built to the old building regulation standard of 10 cubic meters/h/sqm.

You’ve been told many times about the need to insulate your home to a high standard. This is indeed by far the most cost effective way to lower your fuel bills, not to mention comply with the energy requirements of the building regulations. But insulation and airtightness go hand in hand.  

     Indeed after the insulation is fitted, an airtight membrane/vapour control layer must be applied to the warm side of the insulation, otherwise all the hard work you put into insulating and protecting your home will literally leak at the seams. 


Written by Astrid Madsen

Astrid Madsen is the editor of the SelfBuild magazine. She previously held the same role in an Irish trade publication, before that she worked at the National Standards Authority of Ireland. She graduated with a BA in Urban Studies from Columbia University in New York and holds an MBA from the Instituto de Estudios Bursatiles in Madrid. France of origin, she now lives in Portarlington, County Laois, where she's taken on the task of renovating a listed building! Email

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