Testing Airtightness

The carpenters have been working on odds and ends while the plumber and electrician finish their rough-ins. We should be ready for inspections by week’s end. In the meantime, the last of the windows and doors were installed and the air sealing for the house was completed. This morning was our first blower door test. For those who don’t know, the test measures how much air leaks into the house through any gaps in the building enclosure (slab, walls, windows, roof), however small they may be. For Passive House certification, we need to be below 0.6 air changes per hour at 50 pascals of pressure. Our test this morning measured 0.4, which is fantastic. We later discovered that 1) there was an empty 2″ conduit for electrical wiring that had not been sealed, and 2) two of our four doors were leaking air on the hinge side and can be adjusted. Our final test when the house is complete should be even better!

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