Blower Door Testing in Wenatchee & Chelan County
A blower door test measures how airtight a building actually is. We mount a calibrated fan in an exterior doorway, depressurize the building, and measure the airflow required to hold a standard pressure difference. The result is a number you can document, compare, and act on. L&S Contracting Services performs blower door testing for builders, general contractors, and homeowners across Wenatchee, East Wenatchee, Malaga, Cashmere, Leavenworth, Chelan County, and Douglas County.
For builders and GCs: Washington State Energy Code compliance
New residential construction in Washington requires air leakage testing as part of Washington State Energy Code compliance, and the result has to be documented for the project. We handle that test and provide the report so your paperwork is complete for the inspection. Scheduling matters on a build: we work around your drywall, insulation, and finish schedule, and we can usually coordinate the test alongside the insulation or air sealing work we are already doing on the job. If you build in the Wenatchee valley regularly, we can slot tests into your standard sequence so it stops being the thing that holds up a certificate of occupancy.
Pre-drywall vs. final testing
A pre-drywall test is diagnostic. The air barrier is still exposed, so when the fan finds a leak at a top plate, a window flange, a chase, or a rim joist, the crew can fix it that day for the cost of a tube of sealant instead of opening a finished wall later. A final test is the one that documents compliance on the completed building. Many builders use both: pre-drywall to find and fix problems while access is cheap, then final to record the number. For a remodel or an addition, testing before and after the work shows what the improvements actually bought.
For homeowners: finding the leaks
If your house is drafty, dusty, hard to heat in January, or hard to cool in August, a blower door test tells you where the air is moving instead of guessing. Under depressurization the leaks become findable, and we can point out the specific locations that matter most: attic hatches, can lights, plumbing chases, rim joists, and crawl space connections. Because we also do air sealing, insulation, and spray foam, the test can lead directly into the fix rather than a referral.
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FAQ
Common questions
- Is blower door testing required for new construction in Washington?
- Air leakage testing is part of Washington State Energy Code compliance for new residential construction, and the result must be documented for the project. We perform the test and provide the report for your file.
- Should we test before or after drywall?
- Both have a purpose. A pre-drywall test finds leaks while they are still cheap to seal. The final test documents the completed building for compliance. Many builders schedule both.
- How fast can you schedule a test for a builder?
- We keep testing on our regular schedule for Wenatchee-area builders and GCs. Call 509-433-4065 with your target date and we will confirm availability and work around your drywall and finish sequence.
- Can homeowners get a blower door test?
- Yes. Homeowners use testing to find the drafts, dust paths, and comfort problems in an existing house, and we can follow the test with air sealing and insulation work.
Need garage door or insulation work done right?
Call 509-433-4065 or request an estimate online. Serving Wenatchee, East Wenatchee, Malaga, and the surrounding North Central Washington area.