Achieving air tightness requires professional detail, workmanship and product. In most cases it is not a DIY job.  Application of the air tightness materials requires knowledge in order to select the right detail and product, install it right, ensuring that everything is taken into consideration.

We are involved in air tightness in new build and renovations since 2009. We are continuously listening to our various customer types and improving our skills to meet market demands on the increased levels of air tightness and vapour control installations.

Our experienced installers ensure that the necessary work is carried out to the highest of standards, that the correct product is used and applied in accordance with the manufacturers details and thereby ensuring that the workmanship, installation and product will last the test of time. We are also happy to just offer professional advice.

What is Airtightness?

Dublin residents and business owners can turn to Pro Insulation air tightness installers for advice and proven solutions for airtightness problems.

The airtightness of a dwelling, or its air permeability, is expressed in terms of air leakage in cubic meters per hour per square meter of the dwelling envelope area when the building is subjected to a differential pressure of 50 Pascals (m3/(h.m2) @ 50Pa). The dwelling envelope area is defined in this context as the total area of all floors, walls and ceilings bordering the dwelling, including elements adjoining other heated or unheated spaces. Air leakage is defined as the flow of air through gaps and cracks in the building fabric. Uncontrolled air leakage increases the amount of heat loss as warm air is displaced through the envelope by colder air from outside. Air leakage of warm damp air through the building structure can also lead to condensation within the fabric (interstitial condensation), which reduces insulation performance and causes fabric deterioration.

why is airtightness important

Under the 2011 Building regulations all new houses must have an air-tightness test carried out in order to show compliance to Part L of the building regulations. Part L of the Building regulations deals with the Conservation of fuel and Energy and requires that all new houses have a maximum air leakage rate of 7m3/(h.m2) @ 50Pa. Current good practice for energy efficient dwellings includes achieving airtightness of better than 5m3/(h.m2) @ 50Pa and best practice is less than 3m3/(h.m2) @ 50Pa.

As Pro Insulation advises, due attention to air leakage and appropriate insulation bring significant cost savings to property owners over the long term. Lower energy bills are the ideal incentive to strive towards airtightness. Moreover, controlling air leakage makes buildings much more comfortable to live and work in. For all your inquiries regarding airtightness, Dublin home and business owners should contact Pro Insulation today.

Why build an airtight house?

  • Lower energy bills
  • Greater comfort
  • Better sound protection
  • Prevent building damage caused by water vapor
  • Heating system will work more efficiently
  • All new homes and buildings require an airtightness test

How much does airtightness application cost?

We can provide you with an estimate for airtightness application if you contact us by e-mail ( The only information that we require is the size of your home in square meters, in addition to your name and e-mail address. We will then respond to your query as soon as possible with the estimate in addition to further details in relation to getting the price fixed.

  • Consider the appointment of an independent airtightness adviser.
  • Appoint an air barrier manager.
  • Identify the line of the air barrier at an early stage of design.
  • Inform the project teams of the importance of the air barrier.
  • Refer to airtightness in all contracts which impact on the air barrier.
  • Specify and/or select airtight components.
  • Check interfaces between components and work packages to ensure the continuity of the air barrier.
  • Inform the site management team of the location and importance of the air barrier.
  • Explain to site operatives the critical importance of airtightness.
  • Check air barrier completeness before it becomes impossible to access.
  • Schedule an airtightness test by a competent body well in advance.
  • A pre-test visit to site by the testing body is recommended for larger sites.
  • Ensure all airtightness works are complete.
  • Contractor to have responsibility for sealing vents and open flues, closing trickle vents, external doors and windows, in preparation for airtightness test.
  • Airtightness test carried out and results issued.
  • Results submitted to Building Control/client by contractor.