Blog Post
Going to School for Building Enclosure Commissioning
On our way from a UW-Madison parking lot to the commissioning course location — The Pyle Center — my brother and I noted the irony of the torn housewrap flapping in the wind (just to the left of the crane, 7th floor down from the top) on this Madison building under construction.
This past November I bit the bullet and spent three days in class, a half day in exams, and several thousand dollars, and fulfilled the requirements for these two certifications:
- Building Enclosure Commissioning Process Provider (BECxP)
- Commissioning Authority + Building Enclosure (CxA+BE)
Huh? Just what the hell does that mess of acronyms really mean? Here are my key takeaways from the course, the exam, and the experience.
About commissioning
Commissioning (sometimes abbreviated "Cx") is an owner-driven quality delivery process. It means representing the building owner’s interests in high performance, starting as early as the pre-design phase and extending into as much as one year of building operation.
Why commission?
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- Commissioning proves that systems work at installation
- Commissioning lends validity to energy efficiency claims
- Commissioning improves durability.
Commissioning can be used for any size project, but realistically it is used primarily on larger (and longer) commercial building projects.
Commissioning is not inexpensive for the owner, but delivery of a higher-performing building with reduced rework, punch lists, callbacks, and defects can make it well worth it. The overall cost of a project can be less.
Commissioning is about guidance and verification of the quality process. The liability and responsibility for the project stays with the architect and engineer of record.
About the University of Wisconsin Building Enclosure Commissioning program and certificates
Building enclosure commissioning instructor Fiona Aldous whips up a quick sketch to demonstrate a key enclosure detail on one of her case studies. Fiona’s hand-drawn 3-D isometric details in the course materials were works of art.
The University of Wisconsin-Madison Department of Engineering BE Cx program remains the only real game in town and its stature grows accordingly.
About the course instructors and class
John Davis, PE, of UW-Madison’s Engineering Department administers the course and exams; he runs the ship. His work and background are in mechanical engineering — not building enclosures — so he heads up the introduction to commissioning, following and honoring the work of Chuck Dorgan (retired), who developed the course's commissioning approach. John makes the course hum with his attention to detail.
Fiona Aldous, principal with Wiss, Janney, Elstner Associates, takes the lead when it comes to teaching about the building enclosure commissioning process. An architect by training, Fiona is a prime author of NIBS/ASHRAE Guideline 3 – The Building Enclosure Commissioning Process , the guidance document for building enclosure commissioning. Fiona is an awesome instructor and lends critical field experience to the course content.
Joseph Lstiburek, PE and PhD, a principal of Building Science Corporation, lays the building science foundation for the course. He is introduced as the “North American Dean of Building Science.” It just does not get any better than Joe.
Peter Adams, principal with Morrison Hershfield, takes the lead on the topics of field and lab testing of building enclosures. He is wicked smart, unassuming, and brings the testing element of building enclosure commissioning to life.
About the elements of building enclosure commissioning
What’s driving building enclosure commissioning?
- LEED V4 (October 2016) – A prerequisite called Fundamental Commissioning & Verification includes a requirement for design review of the building enclosure. It also mentions building enclosure commissioning in both the Owner Project Requirements (OPR) and the Basis of Design (BOD), and references ASHRAE Guidelines 0 (Cx) and ASHRAE Guideline 3 (BE Cx).
- ANSI/ASHRAE/USGBC/IES Standard 189.1-2011 – This standard requires commissioning for any building over 5,000 square feet and includes these systems: Building Envelope Thermal, Moisture, and Pressurization.
- IGCC - 2012 – Chapter 9 is on Commissioning, Operation, & Maintenance; section 903.1 – Construction or system requiring verification includes: vegetative roofs, subsoil drainage, foundation dampproofing, flashings, and exterior wall coverings.
NOTE: According to Fiona Aldous, 189.1 and IGCC are to merge into one document in the next few years.
Paying attention to details and overseeing performance testing
MasterSpec Section 01 91 19, Building Enclosure Commissioning, is based on ASHRAE Guideline 3 and weaves review of details in with review of specs.
I could not resist taking this picture. As I was sitting at my desk writing this blog, I glanced up to see my “posted” BE Cx certificate just under my wingnut hat (essential gear for our Wingut Test Facility). Always important to maintain a balance and a sense of humor in one’s work…
Building enclosure commissioning requires reviewing all details and identifying missing details.
Building enclosure commissioning includes a review of all mock-ups and submittals; job site quality management of construction details may involve a variety of checklists, including custom, sequential, or construction checklists.
Types of performance testing can include: air infiltration, water penetration, water absorption, condensation, thermal performance, accelerated aging, adhesion, anchor pull-out, infrared thermography, and whole building airtightness.
If the people in charge of commissioning can’t be at the job site at critical stages of construction, they should set up training sessions ahead of time to ensure that the details get done right.
Final takeaways
With an experienced integrated project team, building enclosure commissioning can be just a part of the high performance process; if the project team lacks either experience or integration, building enclosure commissioning can be an ugly and frustrating babysitting nightmare.
It’s the custom and singular nature of building that leads to project complexity, lack of uniformity, and failure to take advantage of lessons learned. These facts ultimately elevate building enclosure commissioning to a mandatory element of high-performance buildings.
Published May 2, 2017 Permalink Citation
Yost, P. (2017, May 2). Going to School for Building Enclosure Commissioning. Retrieved from https://www.buildinggreen.com/blog/going-school-building-enclosure-commissioning
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