Early Testing: A Key to Airtightness

Posted on April 13, 2017

In 2015, the Seattle Energy Code saw increased strictness in airtightness requirements with the maximum allowable leakage rate shifting from 0.4 to 0.3 cfm per square foot. That may not seem significant at first glance, but consider this: as of this post, multifamily buildings tested by RDH had a 92% pass rate at 0.4 cfm […]


Defining Net-Zero: The Next Step in High-Performance Building Design

Posted on November 10, 2016

“So, what’s next?” This question has been posed to me not once, but twice over the last few weeks—both times by clients. It’s the type of question that can make you freeze up as you rack your brain and hope that you can answer with something profound and interesting. It isn’t an easy question to […]


Why Building Airtightness is Important

Posted on August 5, 2016

In the simplest terms, building airtightness refers to a building’s resistance to air leakage—air flowing both in and out of the building—through areas of the building enclosure not intended to allow air flow. The idea of air entering or exiting a building may not seem like cause for concern, but in reality, airtightness is an […]


What is Façade Engineering?

Posted on July 15, 2016

Building façades, envelopes, or enclosures—by whichever name you call them—are a key element in a building’s design. Largely responsible for a building’s performance in energy efficiency, airtightness, and water resistance, these building “skins” are undeniably complex systems, but more than that, they are the part of a building seen by the world. By their very […]