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Why is testing required?

On Feb. 1, 2021 there was a amendment to the WA State Residential Energy Code that requires independent 3rd party testing:

C406.9 Reduced air infiltration. Air infiltration shall be verified by whole building pressurization testing conducted in accordance with ASTM E779 or ASTM E1827 by an independent third party. The measured air leakage rate of the building envelope shall not exceed 0.25 cfm/ft2 (2.0 L/s•m2 ) under a pressure differential of 0.3 in. water (75 Pa), with the calculated surface area being the sum of the above and below grade building envelope. A report that includes the tested surface area, floor area, air by volume, stories above grade, and leakage rates shall be submitted to the code official and the building owner.

What is included in Air Leakage Test?

  • Calculate square footage and building volume.
  • Set up blower door and measure air leakage.
  • Calculate ACH50 (air exchanges per hour at 50 pascals).
  • Electronic test results maintained on file and attached to WSEC Affidavit posted on site.

Checklist before testing

  1. Physical location or address
  2. Plans on site
  3. All exterior doors windows installed
  4. All attic and crawlspace access points finished and weather stripped
  5. All mechanical equipment installed complete with venting
  6. All exhaust fans installed with venting dampers


  • Residential Blower Door Tests
  • Duct Leakage Tests (to be performed at finish with Blower Door)

Additional travel cost may apply depending on location

Payment can be made by credit card or Cash app

Call for a FREE Estimate (see contact info below).

Why use Eric?

  • Over 40 years experience in the insulation and energy business
  • Has been testing since 2010
  • W.S.E.C. Residential Certified
  • Building Performance Institute (B.P.I.) Certified
  • Retrotec Certified
  • Fully licensed and insured in Washington State (UBI# 604942895)
  • Uses the best, up-to-date testing equipment
  • 48-hour scheduling

Customers that trust Eric

Eric's always on time and professional. - Mel Shilley, Phoenix Construction, Chelan, WA

Can always count on Eric!  - Ray Perez, Ray's Construction Consulting, Wenatchee, WA

I have used Eric on many of my projects over the years. - Devin Casto, Casto’s Inland Group, Cle Elum, WA

Will continue to Use Eric's service. - Todd Ingles, Prairie Homes, Ellensburg, WA

Schedule a test today

Contact Eric direct by email, text, or phone to schedule and date and time (see contact info below).

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