An Introduction to Thermal Bridge Assessment and Mould Risk at Dampness Surface for Heritage Building

Hanafi, Mohd Hanizun; Umar, M. U.; Razak, Arman Abdul; Rashid, Z Z A; Noriman, N. Z.; Dahham, Omar S.

doi:10.1088/1757-899x/454/1/012185

Cited by 9 publications

(10 citation statements)

References 13 publications

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“…From detailed observation of the three sets of photographs from the late 1990s, 2013 and 2020 it is possible to conclude that this phenomenon is still ongoing. The occurrence of salts could have been trigger by water infiltration and condensation due to old and damaged installations and leaking pipes (Hanafi et al 2018;Young 2008). It must be noted that within the main hall, the mural panels span over two stories high, which positions the floor joint in the middle of the paintings as illustrated in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

Unveiling the mural painting art of Almada Negreiros at the Maritime Stations of Alcântara (Lisbon): diagnosis research of paint layers as a guide for its future conservation

Gil¹,

Costa²,

Cvetkovic³

et al. 2021

GEC

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This paper reports the diagnostic research of deteriorated paint layers from three mural panels made by Almada Negreiros found in the Alcântara Maritime Station in Lisbon. The aim was to understand the main decay phenomena to aid future conservation works. The methodology comprised in-situ analyses by technical photography in Vis, Vis-RaK and UVF, p-OM and h-EDXRF; micro sampling; OM, SEM-EDS, μ-XRD, μ-Raman, µ-FT-IR and Py-GC/MS. Preliminary results show that all the paint layers analyzed are affected by salts (alkali sulphates) that over time have caused flacking, lack of cohesion, erosion, and lacunae. The light greenish/greenish bluish paint layers in all three panels are the most affected. No organic binders were identified, only the presence of vinyl polymer in glossy paint surfaces.

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Section: Resultsmentioning

confidence: 99%

Unveiling the mural painting art of Almada Negreiros at the Maritime Stations of Alcântara (Lisbon): diagnosis research of paint layers as a guide for its future conservation

Gil¹,

Costa²,

Cvetkovic³

et al. 2021

GEC

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“…Another important problem that can occur in the case of ventilated facades is the possibility of moisture, including moisture coming from condensation of water vapor. In the case of moisture which may appear as technological moisture from the construction period or during periods of low outside air temperature [15,16], it should be taken into account as a factor strengthening the effect of the point thermal bridge. If the process of moisture accumulation and its impact on the materials of the construction layer or thermal insulation layer is not stopped, it may lead to destruction of the structure and loss of basic thermal insulation properties.…”

Section: Review Of Test Results For Thermal Bridgesmentioning

confidence: 99%

Analysis of the temperature distribution in the place of fixing the ventilated facade

Ujma

Pomada

2019

E3S Web Conf.

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Designers more and more often choose facade systems with ventilated layers for external walls, especially in the case of new buildings. They are also used to modernize existing buildings. Mechanical connectors are a characteristic element of these constructions. Often, they are ignored in calculating the heat balance of rooms and the entire building. Because they pierce the thermal insulation layer they cause point thermal bridges. The influence of thermal point bridges, usually made of aluminum, i.e. a material with very high thermal conductivity, for heat transfer turns out to be significant. Such thermal bridges significantly increase heat losses through building partitions. This situation increases the heat demand in the rooms to compensate for the heat loss. The article presents the results of the analysis of the impact of mechanical fasteners in ventilated facade systems on heat transfer in the building envelope. The influence of various materials and constructional solutions on the thermal conditions in these walls was investigated.

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“…The IAQ contributing factors can be divided into physical parameters, such as temperature and humidity, chemical parameters, such as concentration of pollutants and substances in the air, and biological parameters, which include the presence of organic compounds and mould [3,4,5]. Indoor mould growth prevalence is further amplified by inappropriate design strategies [7], poor construction and maintenance practices [8], occupants' living conditions [4,8,9] that may lead to indoor accumulation of moisture or condensation within the envelope [10]. Despite its great influence, mould growth is seldom considered nor well specified in building codes [4], and the lack of standard makes it difficult to establish its exact prevalence and diffusions.…”

Section: Introductionmentioning

confidence: 99%

“…Excessive dampness and indoor mould are estimated to affect between 10% and 50% of the global building stock, a percentage that is likely to be even higher in less privileged communities making exposure to mould a significant risk factor for individuals and communities [6]. Indeed, the digesting process of fungi growing within the building envelope reduces the building materials and components service life [11], and the early biodeterioration requires anticipated and extensive renovation works, with the consequent economic loss [8,9,12,13]. Further, long exposure to indoor mould can have adverse health impacts with different degrees of severity.…”

Section: Introductionmentioning

confidence: 99%

Indoor air quality and early detection of mould growth in residential buildings: a case study

Brambilla

Göçer

Cândido

2022

Preprint

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Mould growth affects 1 in 3 homes, and it is the biggest cause for complaints and litigations filed to the relevant authorities in Australia, while significantly affecting the physical and psychological health of the building occupants. Indoor mould is caused by excessive dampness, resulting from poor architectural specification, construction and maintenance practices, as well as inappropriate occupants’ behaviour. The consequences range from early biodeterioration of building materials, requiring anticipated renovation works, to deterioration of the indoor environment, posing a serious threat to the building occupants. This study investigates indoor air quality and mould growth, providing a snapshot of the current indoor air quality of Australian residential buildings regarding air pollutants. It uses a case study representative of the typical Australian suburban home to investigate the effects of unnoticed mould growth. Results of the monitoring campaign indicate that buildings with a high concentration of fungal spores are also more likely to present poor indoor air quality levels, high concentrations of particulate matters (PM 10 and PM 2.5) and CO 2. This research suggests the need for the development of early detection strategies that could minimize the health hazard to people, thereby preventing the need for a major renovation.

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An Introduction to Thermal Bridge Assessment and Mould Risk at Dampness Surface for Heritage Building

Cited by 9 publications

References 13 publications

Unveiling the mural painting art of Almada Negreiros at the Maritime Stations of Alcântara (Lisbon): diagnosis research of paint layers as a guide for its future conservation

Unveiling the mural painting art of Almada Negreiros at the Maritime Stations of Alcântara (Lisbon): diagnosis research of paint layers as a guide for its future conservation

Analysis of the temperature distribution in the place of fixing the ventilated facade

Indoor air quality and early detection of mould growth in residential buildings: a case study

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