Kölsch, P (2019) Hygrothermal simulation of cathedral ceiling roofs with ventilated roofing tiles. International Journal of Building Pathology and Adaptation, 37(4), pp. 473-487. ISSN 23984708
Abstract
Purpose: The surface temperature of the sub-roof beneath the ventilation layer and the tiles is one of the most important factors for the hygrothermal performance of pitched roofs. The air layer between tiles and sub-roof and the air exchange with the outdoor air influence the heat transfer and therefore affect the moisture level inside the roof construction. The paper aims to discuss these issues. Design/methodology/approach: This paper provides the results of a research project performed at Fraunhofer-Institute for Building Physics, based on field test results. The investigations analyze the thermal behavior of different vented and ventilated roof constructions. Findings: It was found that for a detailed model with roof cladding and ventilated air layer normally too many parameters are unknown. For that reason a simplified approach was set up, especially to consider the radiation exchange between the tiles and the underlay as well as the effects of the ventilation. Originality/value: Now, effective surface transfer parameters can substitute both cladding and air layer in the simulation, while the approach still provides a high accordance with the measured values. The paper provides characteristic values for different roofing situations to simulate ventilated roofs by means of hygrothermal simulation in a simplified way.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | air layer; heat exchange; hygrothermal simulation; pitched roofs; ventilated roofs; wufi |
| Index terms: | surface temperature, cladding, roof, investigation, ventilation, hygrothermal performance, pitched roof, field test, roofing, methodology |
| Subjects: | data collection methods, air quality, building materials, material properties and characteristics, architectural elements, design practice, research methods, thermal systems |
| Topics: | Design Practice, Research Practice, Construction Materials, Engineering Principles |
| Descriptive scope: | 4 PCTA |
N.B. Descriptive scope is a count of how many of the five facets of empirical research are indicated by the words used in title, abstract and keywords. It is not intended as a judgement on the research; merely a count of the kind of word we would expect to indicate Phenomenon, Concepts, Theoretical framing, Empirical techniques, Analytical techniques. If all five are present, then a code of “5 PCTEA” will indicate this. If you feel the coding for this record is questionable, we welcome discussion around the terms we matched or the way we categorized them. The facet you would expect may not be coded, or a facet may be coded inappropriately. This can also bear on a larger question, of which facets should be treated as defining in construction management research. Please get in touch, and we will look at it. More details here