Building Progress 4: September 2011

September 2, 2011- Randy's mom and brother Dave visit from Bend today.

Say "hello" to Marie Hayslip!  Marie is now an official TrekHaus Mom.

BioPCM going in

BioPCM, a soy-based phase change material, is an easy way to increase thermal mass and improve thermal comfort by minimizing indoor temperature fluctuations.  When the house gets hot (above 76 degrees F), BioPCM stores heat by changing from solid to liquid.  As the house cools down (below 76 degrees F), BioPCM changes from liquid to solid and releases heat.  The thermal mass of one sheet of BioPCM (about half inch thick) is like adding 12 inches of concrete!

Christophe Parroco and Steve Gross from the PSU research crew.

Backside of BioPCM (above).
BioPCM (below) being installed between insulation and future drywall of center wall on 2nd floor.  BioPCM can be installed in walls, floors, ceilings, and attics of new builds as well as retrofits.
Thermocouple wires/sensors in place to measure temperature of BioPCM sheets.

September 6, 2011- blower door test
After recent penetrations in the building envelope for plumbing and electrical installations, thought it was about time for another blower door test to measure air tightness.  Today's test result (ACH50 = 0.46) confirms that TrekHaus meets the Passive House air tightness standard of ACH50 < 0.6 air changes per hour at 50 pascals pressure difference applied across building envelope.  Our remaining air leakage appears to be mostly around the temporary doors.  Thanks go to Rob, Bart, Randy, Lina, Kent (Energy Trust of Oregon), Aaron (Earth Advantage), and Christophe (PSU research team) for finding and sealing air leaks.  Great job everyone!


Bart using "smoke" stick to look for air leaks around window (below).

September 9, 2011- Blown-in cellulose insulation goes in


In addition to the blown-in cellulose, you can also see the BioPCM installed in the 2nd floor ceiling.

September 22, 2011- Finishing drywall


Front porches poured...

Outside framing around windows will separate windows from exterior rigid foam insulation, which should arrive next week.

Rob and Bart planning next steps...

September 30, 2011- Zehnder ComfoAir 350 HRV (heat recovery ventilator) installed in "bump-out" and connected to the Zehnder ComfoFresh air distribution system.



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