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Why Building Envelopes Matter During Blackouts

By: The Falcon Group - David Schaub
Tel: (908) 595-0050
Email The Falcon Group


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"Where were YOU when the lights went out?" was a famous slogan from the 1965 Northeast Blackout, but a better slogan in light of the more recent Superstorm Sandy Blackout of 2012 might be "How did YOUR building perform when the lights went out?"

The blackout of 1965 occurred during a typical bitter cold stretch of weather in November of that year, affecting parts of Ontario, Connecticut, Massachusetts, New Hampshire, Rhode Island, Vermont, New York, and New Jersey. Over 30 million people and 80,000 square miles were left without electricity for up to 13 hours. The famous New York City Blackout of 1977 lasted from July 13-14, during a massive summer heat wave, and while it was confined to New York City and its surroundings, over nine million people were affected. And of course we all can recall the aftermath of Superstorm Sandy which hit landfall on October 29-30 in 2012, leaving an estimated 8 million people in the northeast without power, some for weeks after the storm clouds blew away.

History has indicated that the vast majority of people remain in their homes, if possible, during extended blackouts. When the power goes out, buildings are "dependent on whatever protection is provided by their walls, windows, and roof." (1) So how did YOUR building perform during Superstorm Sandy? Temperatures during the blackout following the aftermath of Sandy typically (and thankfully) stayed above freezing during the night and rose to the 40's and 50's during the day, compared to the winter and summer blackouts of 1965 and 1977 which occurred during much more temperature extremes. A study by the Urban Green Council recently showed "that during an extended winter blackout, the temperature inside a typical single-family house would be 35°F after three days. A typical high-rise apartment would drop to 45°F after three days, and then keep falling....In a summer blackout, temperatures in a typical all-glass apartment building would jump to almost 90°F, eventually rising to above 100°F."(1)

The study further details the vast difference in indoor temperatures during a blackout for "high-performing" glass high-rise buildings, which would stay well above 50°F for more than a week after a power outage in winter, with brick high-performance high-rise buildings below 85°F for more than a week in summer. (1)

These findings further exemplify the need to make your building more "high-performing" and better able to withstand an inevitable power outage, whether it is for just a few hours during a summer thunderstorm or for days or more during a serious weather occurrence like Sandy. The Falcon Group can diagnostically assist in taking your building to the next level of performance. Thorough building investigations can be performed to uncover common maladies such as missing insulation in wall and attic cavities. More heat is lost through walls than any other route - approximately 33% in an uninsulated home. (2)

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Missing insulation in 2nd floor bedroom wall cavities uncovered during a siding upgrade project.

Using infrared cameras, the Falcon Group can pinpoint leaks in the building envelope, as well as determine poorly performing windows and doors. Leak testing on windows and exterior doors can then be compared to properly performing windows and doors for a thorough analysis of the entire exterior façade.

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Infrared cameras demonstrating heat loss in neighboring buildings compared to a 'high performance' building shown in dark blue (Photo courtesy of The Urban Green Council)

Mechanical deficiencies in your building such as improper ducting and improperly working HVAC equipment can also compromise the performance of your building. The Falcon Group can recommend improvements to the existing systems such as retro-commissioning existing mechanical equipment for optimized performance, and installing remote dataloggers to verify the ongoing performance and collect data quantifying the results of the improvements.

Cost analyses of typical building performance improvements can range in these applications from low cost improvements (retro-commissioning) to higher cost improvements (window and door replacement). Once building performance improvements are initiated, energy savings can be predicted which will help building owners find incentives and financing to reduce or even eliminate out-of-pocket expenses for these improvements.

So how will your building perform the next time the lights go out? With recommendations from the Falcon Group for improving building performance, you'll be much better prepared to 'weather' the next storm.

Should you have any questions or concerns regarding the issues discussed in this article please feel free to contact The Falcon Group.

References:

(1) Urban Green Council, New York Chapter of the U.S. Green Building Council, February 2014
(2) Statistic from the National Insulation Association

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The Falcon Group a team of highly-skilled professionals, was established to offer consulting in the fields of Professional Engineering and Architecture. Our project management and financial control processes allow us to consistently deliver projects on schedule and within budget. Our reputation is built on our attention to detail and relentless commitment to client satisfaction and our principals maintain a visible role in our assignments to ensure that relevant issues will be anticipated and resolved satisfactorily, in a timely fashion.

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