Corrective Action for Failed Envelope Tightness Test

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You failed your envelope tightness test. Here’s what to do next:

  • Seal all can lights to air barrier

  • Seal all receptacle/switch boxes to air barrier

  • Seal all light boxes to air barrier

  • Seal all utility penetration

  • Seal crawl and attic access covers

  • Seal all accessible plumbing penetrations

  • Seal all other identifiable sources of infiltration that are accessible

Retesting is not required but highly recommended to support the effectiveness of the corrective measures. Multiple failures are not acceptable.

All builders, or their designated agents, who fail blower door testing are encouraged to attend a free, two-hour training on envelope tightness. Classes are regularly scheduled - please click here to find a current list of trainings.

All testers must be BPI, RESNET, or IDABO DET certified. A recommended form for compliance, to be filled out by the agent performing the test, is available here.