Category Building Failures - Page 3

6
Feb
The Hidden Risks of Green...
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Comments Off on The Hidden Risks of Green Buildings: Avoiding Mold & Moisture Problems

This is the first post in a series by J. David Odom (ASHRAE), Richard Scott (AIA/NCARB/LEED AP), and George H. DuBose (CGC). It was first published as a mini-monograph for NCARB (National Council of Architectural Registration Boards). “Most new products are experiments and most experiments fail.” ~ Quote from “How Buildings Learn: What Happens After

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

8
Aug
Looking at a Building’s...
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This post by David Odom is part 3 of 3. To the discerning eye, there are remarkable similarities between the biomed and construction fields. The medical community consistently looks for biomarkers in human DNA structure. This helps them to connect the dots between cause and effect. Even as early as the womb, they are able

26
Jun
Building Owners Beware: T...
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Comments Off on Building Owners Beware: The Rooftop Swimming Pool That You Don’t Want (Part 2)

This post by Don Snell is part 2 of 2. Air is uncontrolled when it infiltrates. Air infiltration can be caused by mechanical fan effects or wind pressure. In this case, it was caused by strong negative fan pressure. Roof curb spaces should be maintained at a near-neutral pressure with respect to the outdoors. These,

15
May
Building Symptoms and Wha...
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This post by Don Snell is the third in a series of four examining the relation of moisture building assessments and building science as a component to design, construction, and commissioning. The tenant, in an attempt to achieve more comfortable space conditions, will typically lower the thermostat set-point, causing these spaces to cool further while