GBE > Encyclopaedia > Code > Checklist > G#1720 N#1622

A94 Air-Tightness Testing On-Site Checklist

A94 Air-Tightness Testing On-Site (Checklist)
About:
Index:

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Problems:

• ATL of 10 at 50 Pascals set by Building Regulations Approved Document L is a very leaky building
• Wind will whistle through gaps in windows and papers will flutter across tables
• This level of performance in new build is fundamentally incompetent
• What is scary is that UK Construction Industry find it hard to get 10

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Misunderstandings:

• Airtightness is often seen as a problem, it’s better to refer to air-leakiness, waste heat energy, cold drafts, and thermal comfort.

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Solutions:

• Results of 1 air leakage rate at 50 Pascals is better but Europeans are used to 0.3 and better
• Passivhaus levels of performance: 0.6 for new build and 1.0 for refurbishment

Consider:

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Avoid:

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Minimise:

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Value Engineering:
(looking at the bigger picture)
(getting stuff into projects, not just out of them)

• Carry out the wind/air tightness testing once the building fabric is in place, do not wait for finishes to be installed.
• Test the building fabric not the finishes, the finished can be replaced at shorter life intervals without having to re do the testing.
• Testing the finishes will mean you may end up sealing every screw hole for every object hung on the wall lining.
• Testing and sealing the finishes means the air space behind the linings is still subject to thermal flanking, eddie currents, heat loss and coolth gain through leaky external fabric
• If the sarking or lining board/sheet is airtight then only the joints need to be taped to maintain integrity of the board/sheet performance.
• Be sure to test the board/sheet before installing them.

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Substitute:

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Health:

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Wellbeing:

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Safety:

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Precautionary principle:

•  _

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Resource Efficiency:

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Reduce:

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Reclaim:

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Reuse:

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Recycle:

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Recover:

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Waste Issues:

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Waste Category:

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Hazardous waste:

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Waste statistics:

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End of Life options:

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Appropriateness:

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Competence:

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Effectiveness:

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Yardstick:

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Maintenance issue:

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Information sources:

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© GBE NGS ASWS BrianMurphy aka BrianSpecMan
13th December 2014 – 23^rd November 2018

A94 Air-Tightness Testing On-Site Checklist
Images:

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GBE CPD: Air Movement on Building
Page 2: Topics in Series of 24 Seminars
Air and Wind tightness and testing are included

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If you wish to reproduce images, feel free, but please acknowledge the source.

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© GBE NGS ASWS BrianMurphy aka BrianSpecMan
13th December 2014 – 23^rd November 2018

A94 Air-Tightness Testing On-Site Checklist
See Also:

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GBE Checklist (New Build)

• A90 Performance Specification (Checklist) G#1715 N#1617
• A91 Prescriptive Specification
• A92 Package Outline
• A93 Performance Testing Off-site Mock-up Test rigs
• A94 Airtightness testing on-site (Checklist) G#1720 N#1622 (this page)
• A95 Infra-Red Thermographic Surveys (Checklist) G#1721 N#1623

Refurbishment Checklist

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GBE Jargon Buster

GBE Jargon Buster Theme

• Air Wind Tightness (Jargon Buster Theme) G#1420 N#1391

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NGS CPD

Seminar Topic Group

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GBE LINKS

• Organisation/Website

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GBE MANUFACTURERS

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GBE PRODUCTS

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GBE MATERIALS

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GBE SYSTEMS

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GBE ELEMENTAL ASSEMBLIES

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GBE CALCULATOR

• Product

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GBE CAD

• 2D and 3D SketchUp Product files
• SketchUp files of Construction Sections

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GBE GREEN BUILDING SPECIFICATION

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GBE PROJECTS

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© GBE NGS ASWS BrianMurphy aka BrianSpecMan
13th December 2014 – 23rd November 2018