Category Case Study

1
Oct
Military Housing Washes O...
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Comments Off on Military Housing Washes Out on New Air Barrier Standards

It remains to be seen whether new building code requirements that contain stricter air tightness standards based on energy efficiency initiatives are actually attainable. Buildings that passed former air tightness standards with flying colors just a few years ago would now fail dismally under more recent, aggressive standards in codes such as IgCC and IECC.

1
Apr
Is Big Data in Constructi...
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Massive construction projects often create major building forensic issues, requiring big data collection that quickly becomes a liability if not managed properly. If a quarter million data sets are to be used by a 40-member team, the data needs to be organized so as to efficiently accomplish goals and achieve solutions amidst large construction project

18
Mar
Liberty Building Forensic...
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Florida-based Liberty Building Forensics Group® (Liberty), a leading building forensics firm that has solved some of the world’s largest and most complex building moisture and mold problems, has recently completed an expert moisture-related consulting project for a building project called Pegasus Landings. An affiliated student-housing complex for the University of Central Florida, Pegasus Landings had

22
Apr
Liberty Building Forensic...
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Here is a press release we sent out recently. Orlando, Florida – 4/23/2014 – Florida-based Liberty Building Forensics Group® (Liberty), a leading building forensics firm that has solved some of the world’s largest and most complex building moisture and mold problems, has recently completed an expert moisture-related consulting project for a building project called Pegasus

22
Jan
Air Barrier Testing at a...
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Comments Off on Air Barrier Testing at a Tropical Resort, Part 4

By Rick Scott, AIA This is part 4 of 4. Conclusions and Lessons Learned Test findings showed the difficulty of trying to achieve a very tight air barrier installation. While the resort specifications called for a very ambitious whole building air barrier performance target of 0.085 cfm/ft2 at 75 Pa, such numbers are almost meaningless

By Rick Scott, AIA This is part 3 of 4. Results of Air Barrier Testing After the test data was collected, it was analyzed to determine the air leakage rates in cubic feet of air (cfm) per square feet (ft2) of wall surface area. This analysis revealed that the building was leakier than predicted and

13
Dec
Air Barrier Testing at a...
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Comments Off on Air Barrier Testing at a Tropical Resort, Part 2

By Rick Scott, AIA This is part 2 of 4. Air barrier testing was also advocated to make sure the installation was meeting the building envelope air tightness goals set by the design team. One limitation of air barrier testing is that it needs to be performed when the building envelope is substantially complete, since

16
Oct
Case Study – Humidi...
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Comments Off on Case Study – Humidification, Pressurization, and Air Leaks Cause Frost and Ice Damage to a Medical Facility, Part 3

By Rick Scott, AIA This is part 3 of 3. Humidification Testing and Analysis Through quantitative analysis, it was determined that proper operation of the humidification system would solve the frost/ice problem without changing pressurization and/or replacing/altering the presumptive “air barrier.” Replacing/altering the specified vapor retarder to act as an air barrier would have required

2
Oct
Case Study – Humidifica...
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Comments Off on Case Study – Humidification, Pressurization, and Air Leaks Cause Frost and Ice Damage to a Medical Facility, Part 2

By Rick Scott, AIA This is part 2 of 3. As-Built Conditions In Accordance With Design The exterior walls of the steel-framed building were finished with stucco (portland cement plaster) on gypsum sheathing attached to metal studs. A polyethylene vapor retarder was specified and installed. Although some gaps and loose sealing tape were observed in

18
Sep
Case Study – Humidi...
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Comments Off on Case Study – Humidification, Pressurization, and Air Leaks Cause Frost and Ice Damage to a Medical Facility, Part 1

By Rick Scott, AIA This is part 1 of 3. The following case study presents an example of what Liberty Building Forensics Group encountered when excessive humidification, building positive pressurization, and a leaky building envelope combined to cause condensation, frost, and ice damage in a Midwestern medical facility. Liberty was called in two years after