Unintended Consequences: A Review of Critical Details, Serviceability, and Durability of Modern High-Performance Facades
Bibliographic record
Abstract
The design of modern high-performance facades for the construction industry’s largest and most significant projects often involves the use of prefabrication, modern glazing, or curtain wall technologies (or combinations thereof). As a means of quality assurance and control, we depend on familiar tools: applicable codes and industry standards, specified performance requirements, Building Enclosure Commissioning, best practices, warranties, performance mock-ups, performance verification testing, and field inspection. Yet even systems designed with the highest level of detail and the most rigorous quality assurance/quality control programs may still be undermined by piecemeal value management, shortcomings in coordination, and cost and schedule issues. The forensics of building enclosure science is replete with cautionary tales of building enclosures that were designed with the highest of aspirations but that failed to perform as intended. Using an institutional building constructed in 2001 as a case study, we will take a deep dive into the critical details (transitions within the assembly as it evolves from roof to wall, joints, and water management systems) and other sometimes vague requirements such as serviceability and durability. The advantage of hindsight during an evaluation is that we are able to evaluate individual failures as well as the relationship and cascading effects that failures can have on other time-dependent durability requirements. We will present a taxonomy for understanding and analyzing each individual failure, the relationships such failures have with one another, and the decisions made during a project. These organizational strategies may be useful tools when making decisions during early project phases. While the ultimate service life of many “modern” curtain wall systems is expected to exceed the careers of practitioners tasked with design, manufacture, and installation of the systems, a critical look at these issues will become increasingly important as the building stock of high-performance facades and architectural glass continues to age.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.006 | 0.021 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.007 | 0.005 |
| Science and technology studies | 0.002 | 0.006 |
| Scholarly communication | 0.004 | 0.006 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.003 | 0.003 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".