Performance Requirements for Climate Resilience of Residential Roofs
Notice bibliographique
Résumé
The roof is one of the most important elements of the building envelope. It offers protection for the homeowners against weather elements. According to the Institute for Catastrophic Loss Reduction (ICLR) houses are less engineered and are much more prone to damages during weather events. Recent climatic changes have increased the severity of weather events and roof failures. This demands the necessity of updating the design, evaluation, and construction methods for asphalt shingle roofs with a holistic approach. A disconnect exists between the service life of a roof and the advertised warranties of asphalt shingles by the manufactures. This is misleading and prevents homeowners from making informed decisions about their roof selection. This thesis reviewed not only the roof's performance in the field but also the current practices followed for the design, evaluation, and construction methods. The review respectively concluded that the current design is based on only historical data, both components and systems are mostly evaluated under lab conditions, rather than being exposed to the weather conditions experienced during the service life, and lack of installation quality assurance. The objective of this thesis is to develop the initial framework for a “Holistic Approach” that would increase the resilience of residential roofs. This has been accomplished in three folds: 1. Quantified the changes in the design wind loads, using both the current and projected changes in wind pressures due to global warming magnitude. Data provided by Environment and Climate Change Canada was used for this analysis and a new web design tool “Climate-RCI” for climate severity classification of cities across Canada was created. 2. Performed an extensive experimental evaluation of components and systems, following established methods and procedures, to quantify the effect of weathering on the resistance of asphalt shingles and roof mock-ups. To achieve this both components and systems were evaluated. For the component, the resistance after being aged in the field for a minimum of 13 years displayed a maximum decrease of 59%. Measured properties of the majority of the aged components no longer met the minimum requirements outlined in the respective standards referenced in the National Building Code of Canada. The system resistance was significantly reduced due to weather exposure. 3. Developed quality assurance guidelines based on best practices in consultation with the roofing industry for various climatic severities. This thesis identified three major future research areas, namely, calibration of an appropriate resistance factor for residential roofs, correlating lab verse field weather exposure conditions, and probabilistic determination of the installation process.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,002 | 0,005 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,001 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,002 | 0,001 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,001 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,007 | 0,002 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».