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Design and Build Tight – Ventilate Right

AIRTIGHTNESS IRELAND. Design and Build Tight – Ventilate Right. In Association with Bre. James Reynolds Airtightness Ireland. Dwellings and non-dwellings Technical Booklets F1 and F2 Compliance to be based on comparing calculated carbon dioxide emissions with a Target Emissions Rate

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Design and Build Tight – Ventilate Right

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  1. AIRTIGHTNESSIRELAND Design and Build Tight – Ventilate Right In Association withBre James Reynolds Airtightness Ireland

  2. Dwellings and non-dwellings Technical Booklets F1 and F2 Compliance to be based on comparing calculated carbon dioxide emissions with a Target Emissions Rate Air permeability figure used as part of the SAP or SBEM calculation Worst acceptable limit of 10m3/hour/m2 @ 50 Pa Why airtightness is importantBuilding Regulations (Northern Ireland) Part F

  3. Energy savings of approximately 25% if the air permeability is reduced from 15m3/hour/m2 @ 50Pa to 5m3/hour/m2 £££ Why Airtightness is important

  4. Why Airtightness is important Improved comfort and satisfaction for the end user • No cold draughts • As the end users of buildings we will ultimately have to pay for excessive air leakage! Air permeability – Is linked withbuild quality

  5. Requirement for contractors to declare the air permeability figure they have used for SAP Calculations to Building Control Worst acceptable limit of 10m3/hr/m2 @ 50 Pa Test required to prove compliance Why Airtightness is important – Building Regulations Part F2006

  6. Why Airtightness is important • Reduced snagging • No need for expensive remedial sealing • No delays in handing building over to the end user • Reduced risk of building deterioration • Reduced risk of interstitial condensation

  7. Design & Build tight – ventilate right! • A building cannot be too airtight • But it can be under ventilated!

  8. Build tight – ventilate right! Purpose-provided ventilation • Mechanical ventilation systems (fresh air intake through vents) • Extract ventilation • Passive stack ventilation • Trickle vents • Opening windows

  9. ACHIEVING AIRTIGHTNESS THROUGH GOOD DESIGN AND CONSTRUCTION

  10. Lack of awareness of why airtightness is needed results in poor site practice Ensure that everyone is aware of the reasons for achieving airtightness – designers, specifiers, contractors, tradesmen and site operatives Inform everyone that Airtightness is important

  11. Domestic air leakage paths

  12. The main structural elements such as walls, roofs and floors will need to be airtight, but this includes interfaces between components forming elements, e.g: WALLS – window/wall joints, joints in brickwork, blockwork and curtain walling ROOFS – joints in roof cladding, joints between roof coverings and rooflights FLOORS– Concrete floor slabs, joints between suspended floor panels etc What to consider during design

  13. Air leakage paths

  14. Air leakage paths

  15. Air leakage paths

  16. Airtightness test • Airtightness testing must be carried out by a competent body • Membership of the Airtightness Testing and Measurement Association (ATTMA) is one way to demonstrate competence • Testing must conform to the standard procedure set out in ATTMA TS1 (2006) and BS:EN 13829 (2001)

  17. Operates under license from In Ireland

  18. Airtightness testing Examples of fans systems

  19. Airtightness testing Examples of fan systems

  20. LOCAL TEST FOX LODGEDUNADRY, CO ANTRIM 5.2m3/hr/m2

  21. RESULT5.20m3/hr/m2 FOX LODGEDUNADRY, CO ANTRIM

  22. How many dwellings to be tested?If NOT Built to accredited construction details

  23. How many dwellings to be tested?

  24. COMMERCIAL BUILDINGS Price on application due to scale of projects and specific requirements DWELLINGS Based on a daily charge, subject how many tests can be carried out per day in the same locality How much does it cost?

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