March 2019

Air permeability?
In building a new Vaucluse house

Certificate of residential air permeability

The houses that we build feature particularly tight sheathing, as the AEM certificate of air permeability awarded to Villa Speos can attest.

Process involving all project contractors
In order to build a low-energy building or a passive house, several issues need to be addressed including air permeability, ventilation and insulation.  The goal is clear: to let in the least possible unwanted air from the exterior.  From the seller of the home to the project manager and drywall worker, electrician and bricklayer, all sub-contractors involved in a residential building project have a role to play in the air permeability process.

Effects of bad air permeability
Defects related to air permeability can have consequences on the habitation and its occupants.  This may translate into issues with interior pollution and to inhabitants developing health problems such as asthma, mould-related illness, and acoustic insulation.  Moreover, a delayed response to such problems may trigger a significant increase in heating needs and thus result in costly energy bills.

How to measure air permeability
The test consists in creating a difference in pressure between the interior and exterior of a house in order to show airflow.  This measurement must be taken once the building is completed.

What are the reasons for air leaks and what are their consequences ?
The main sources of air leaks observed in homes include external joinery, liaisons between facades and floors, hatches and elements that permeate the walls, such as floor crossings.  Electrical equipment is also responsible for air permeability problems within residences.

Permeability and RT 2012
Thermal Regulation 2012 (TR 2012) imposes an air permeability level for buildings measured upon completion at less than 0.6 m3/(h.m2) for a house. According to our production manager Nicolas Oulieu, this co-efficient came in on average at 0.24 based on 10 homes built by Villa Speos.


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765 avenue des Choralies
opening hours: Monday to Saturday
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