Thermoplastic Polyolefin Roof Membranes Exposed in the Western United States for Seven Years
Bibliographic record
Abstract
Abstract The Western States Roofing Contractors Association (WSRCA), thermoplastic polyolefin (TPO) roofing manufacturers, and the National Research Council Canada started a TPO Weathering Farm Project in 2000 to examine weathering characteristics of TPO roof membranes by exposing them to various weather conditions of four distinctly different climatic regions in the Western United States. The goal was to provide technical and performance information to the Western States Roofing Contractors Association membership, and the North American roofing community at large, regarding TPO roof membranes’ attributes, performance properties, and resistance to weathering. The results are applicable to other regions in North America as the roofs are in four distinctive climate zones (hot and dry, hot and humid, cold and damp, moderate with wet and dry periods). The results and laboratory analyses (thickness, DMA, FTIR, TG/DTG) performed on the TPO roof membranes that were exposed for seven years in the various conditions will be summarized.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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 teacher head, 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".