{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T14:18:24Z","timestamp":1777385904696,"version":"3.51.4"},"reference-count":100,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2021,8,27]],"date-time":"2021-08-27T00:00:00Z","timestamp":1630022400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["PD\/BD\/135192\/2017"],"award-info":[{"award-number":["PD\/BD\/135192\/2017"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"name":"CONSTRUCT - Research Unit Institute of R&amp;D in Structures and Construction at FEUP (Faculty of Engineering of the University of Porto)","award":["_"],"award-info":[{"award-number":["_"]}]},{"name":"Project PRESERVE \u2013 Preservation of renders of built cultural heritage at LNEC (National Laboratory of Civil Engineering)","award":["_"],"award-info":[{"award-number":["_"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Heritage"],"abstract":"<jats:p>The European Union is pursuing an ambitious policy on climate action, urgently calling for an acceleration in the transition toward net-zero emissions by 2050. In this context, retrofitting historic constructions can play a key role in reducing European energy consumption and consequent emissions. What is more, beyond the opportunity for tackling climate change, thermal retrofits can improve indoor comfort while lowering operational costs, factors that are fundamental to ensure the continued use of historic constructions over time, and with that, improving their preservation and durability. The suitability of thermal insulation for this scope is still a debated topic. Thus, this study aims at contributing to the discussion by providing an overview on the feasibility of adopting thermal insulation for retrofitting external walls of historic buildings while preserving their significance and unique identities. Finally, the advantages of adopting thermal mortars rather than more traditional insulation solutions are outlined, and their potential efficacy is discussed.<\/jats:p>","DOI":"10.3390\/heritage4030114","type":"journal-article","created":{"date-parts":[[2021,9,1]],"date-time":"2021-09-01T03:13:17Z","timestamp":1630465997000},"page":"2009-2022","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Retrofitting Historic Walls: Feasibility of Thermal Insulation and Suitability of Thermal Mortars"],"prefix":"10.3390","volume":"4","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4980-3261","authenticated-orcid":false,"given":"Magda","family":"Posani","sequence":"first","affiliation":[{"name":"Buildings Department, LNEC\u2014National Laboratory for Civil Engineering, 1700-066 Lisbon, Portugal"},{"name":"CONSTRUCT (LFC\u2014Laboratory of Building Physics), Faculty of Engineering (FEUP), University of Porto, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7135-8603","authenticated-orcid":false,"given":"Ros\u00e1rio","family":"Veiga","sequence":"additional","affiliation":[{"name":"Buildings Department, LNEC\u2014National Laboratory for Civil Engineering, 1700-066 Lisbon, Portugal"}]},{"given":"Vasco Peixoto","family":"de Freitas","sequence":"additional","affiliation":[{"name":"CONSTRUCT (LFC\u2014Laboratory of Building Physics), Faculty of Engineering (FEUP), University of Porto, 4200-465 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2021,8,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"479","DOI":"10.1016\/j.crhy.2017.10.003","article-title":"Energy transitions after COP21 and 22","volume":"18","author":"Balibar","year":"2017","journal-title":"Comptes Rendus Phys."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Jordan, A., Huitema, D., Van Asselt, H., Rayner, T., and Berkhout, F. 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