Retrofit of Masonry in Historic Buildings: Role of Climatic Loads and Material Parameters

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Abstract

Historical buildings represent cultural, historic and aesthetic value, whether preservation worthy or not. For this reason, the concept of internal insulation has been introduced as a possible energy retrofitting measure for such buildings. The application of the thermal insulation on the interior side of the wall reduces the heating energy consumption and improves the thermal comfort. But it also changes the hygrothermal conditions of that wall reducing the drying potential and leaving the original wall colder and damper when compared to pre-retrofitting. This may lead to undesired consequences like interstitial condensation, mold growth, wood rot and the general deterioration of the façade materials and components. The prediction of the hygrothermal performance of internal insulation solutions plays therefore an important role when designing successful retrofit measures. External loads, e.g. wind driven rain (WDR) and solar radiation, may vary largely depending the location and orientation and have a significant impact especially on historic buildings with porous masonry walls. This paper presents a simulation study for assessment of the hygrothermal performance of internally insulated historic masonryunder given conditions. A monitored case study made up the basis for this study that primarily focuses on the influence of orientation, indoor climate, façade color and brick type with regard to WDR, investigated through dynamic hygrothermal simulations. The results show that high loads from WDR inevitably increased the moisture content of the wall, but also certain material parameters and orientation, including solar radiation in combination with WDR play a role.
Original languageEnglish
Title of host publicationThermal Performance of the Exterior Envelopes of Whole Buildings XIV International Conference
Number of pages10
PublisherAmerican Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE)
Publication dateDec 2019
Pages552-561
Publication statusPublished - Dec 2019
EventThermal Performance of the Exterior Envelopes of Whole Buildings XIV International Conference - Sheraton Sand Key, Clearwater Beach, United States
Duration: 9 Dec 201912 Dec 2019
Conference number: 14
https://www.ashrae.org/conferences/topical-conferences/2019-buildings-xiv-international-conference

Conference

ConferenceThermal Performance of the Exterior Envelopes of Whole Buildings XIV International Conference
Number14
LocationSheraton Sand Key
CountryUnited States
CityClearwater Beach
Period09/12/201912/12/2019
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Hansen, T. K., Peuhkuri, R. H., & Bjarløv, S. P. (2019). Retrofit of Masonry in Historic Buildings: Role of Climatic Loads and Material Parameters. In Thermal Performance of the Exterior Envelopes of Whole Buildings XIV International Conference (pp. 552-561). American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE).