RT Conference Proceedings
T1 Heat transfer through anchoring elements in a rear-ventilated rainscreen insulation system for façade retrofit
A1 Arregi Goikolea, Beñat
A1 Garay Martinez, Roberto
A1 Riverola Lacasta, Alberto
A1 Chemisana Villegas, Daniel
A2 Villegas, Luis
A2 Lombillo, Ignacio
A2 Blanco, Haydee
A2 Boffill, Yosbel
A2 Villegas, Luis
A2 Lombillo, Ignacio
A2 Blanco, Haydee
A2 Boffill, Yosbel
AB Rear-ventilated rainscreen façade insulation systems are becoming a popular retrofit solution in Southern European climates, due to their good thermal performance in both winter and summer conditions. In these assemblies, the substructure of the new cladding is anchored to the original building, thus puncturing the thermal insulation. This study assesses the impact of such thermal bridges on the overall thermal performance of the external wall. The renovation of a conventional Spanish wall construction with a ventilated façade is used as a case study, featuring an anchoring system with L-shaped aluminium brackets. Two scenarios have been assessed: in the first one these brackets are fixed onto both the reinforced concrete slabs and the existing brickwork of the building, while in the second one they are anchored solely to the structural slabs. Simplified one-dimensional calculations are compared with two-and three-dimensional numerical models. Results indicate that anchoring elements can account for a substantial increase in heat flow. If the additional heat transfer through the anchoring elements is not taken into account, the energy savings delivered by the renovation could be considerably lower than expected by calculations, resulting in an increase of energy consumption over predicted values.
PB University of Cantabria - Building Technology R&D Group
SN 9788469770320
SN 9788469770320
SN 2386-8198
YR 2018
FD 2018
LK https://hdl.handle.net/11556/2533
UL https://hdl.handle.net/11556/2533
LA eng
NO Arregi Goikolea , B , Garay Martinez , R , Riverola Lacasta , A & Chemisana Villegas , D 2018 , Heat transfer through anchoring elements in a rear-ventilated rainscreen insulation system for façade retrofit . in L Villegas , I Lombillo , H Blanco , Y Boffill , L Villegas , I Lombillo , H Blanco & Y Boffill (eds) , REHABEND . REHABEND , vol. 0 , University of Cantabria - Building Technology R&D Group , pp. 1694-1701 , 7th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management, REHABEND 2018 , Cáceres , Spain , 15/05/18 .
NO conference
NO Publisher Copyright: © 2018, University of Cantabria - Building Technology R&D Group. All rights reserved.
NO This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 637186. This study has been partially developed within the BRESAER research project. However, it reflects only the authors’ view and the European Commission is not responsible for any use that may be made of the information contained in it. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 637186.
DS TECNALIA Publications
RD 25 jul 2024