Comparative assessment of internal and external thermal insulation systems for energy efficient retrofitting of residential buildings

Kolaitis, Dionysios I.; Malliotakis, Emmanouil; Kontogeorgos, Dimos A.; Mandilaras, Ioannis D.; Katsourinis, Dimitrios; Founti, M.

doi:10.1016/j.enbuild.2013.04.004

Cited by 195 publications

(88 citation statements)

References 31 publications

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“…Cavity wall and roof insulation are generally considered as simple and effective retrofit opportunities when it comes to insulating the building envelope due to cost and ease of installation [30,31]. External insulation is regarded as the better option if a cavity is not present in terms of thermal performance [32,33], and difficulties in installation internally which can lead to mould growth if not properly designed [34].…”

Section: Heat Flow Through the Building Envelopementioning

confidence: 99%

Case studies of cavity and external wall insulation retrofitted under the Irish Home Energy Saving Scheme: Technical analysis and occupant perspectives

Byrne

O’Donnell

et al. 2016

Energy and Buildings

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a b s t r a c tThe residential sector represents 27% of primary energy consumption in Ireland. This paper examines the case study of the Irish government's national grant scheme to encourage energy efficiency retrofit in private housing. That is the Home Energy Saving (HES) Scheme, later rebranded the Better Energy: Homes (BEH) Scheme. The methodology involved monitoring several homes immediately before and after retrofit alongside discussions with occupants. The examination focused on specific measures commonly introduced through the HES/BEH programme − cavity and external wall insulation. It has been found that a significant decrease in heat loss through the walls was measured in all cases. Regardless, the occupant played a considerable role in the change in energy use in the buildings, and the main motivation for retrofit was found to be comfort and not energy savings or environmental concerns. As a result, the actual energy savings are notably less than the potential savings had the pre and post comfort levels remained the same.

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Section: Heat Flow Through the Building Envelopementioning

confidence: 99%

Case studies of cavity and external wall insulation retrofitted under the Irish Home Energy Saving Scheme: Technical analysis and occupant perspectives

Byrne

O’Donnell

et al. 2016

Energy and Buildings

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“…Also, the possible risk of condensation of water vapour coming from the interior is in the exterior TISs limited, especially in the systems with ventilated air gap. The effectiveness of the interior thermal insulation systems is a very often discussed problem, especially due to the possible interstitial condensation, frost damage, salt efflorescence, mould growth and other damage patterns [3]. Nevertheless, in the urban context, where a strict building line often excludes exterior insulation, or in cases of buildings with a historical or worth-preserving facade, interior insulation is often the only possible solution to improve the thermal performance of building enclosure [4], [5].…”

Section: Introductionmentioning

confidence: 99%

In-Situ Monitoring of the Effect of External Environment on a Contemporary Building in Prague: The Performance of the Additional Thermal Insulation System

Pavlík¹,

Fořt²,

Beran³

et al. 2015

Proceedings of the 2nd International Conference on Civil, Materials and Environmental Sciences

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Abstract-Experimental assessment of the hygrothermal performance of an office building in Prague, which was recently provided by an additional contact thermal insulation system (TIS), is done in the paper, in order to evaluate the contribution of the applied TIS to the moderation of the interior climate. At the long-term in-situ analysis of the building, the measurement of relative humidity and temperature profiles along the cross section of a selected part of the building envelope is carried out. The measurement is realised for 1.5 year on the non-insulated wall at first, and after the application of the exterior TIS it continues for another 1 year. The obtained results show an improvement in the hygrothermal function of the analysed building envelope due to the application of TIS that reduces significantly the thermal response of the investigated building to the changes of environmental conditions.

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“…Kolaitis et al [10] performed a comparative assessment of internal versus external thermal insulation systems for energy efficient retrofitting of residential buildings by means of detailed numerical simulations. They concluded that both external and internal thermal insulation configurations are found to significantly reduce the total energy requirements; on average, external insulation outperforms the internal insulation configuration by 8%.…”

Section: Introductionmentioning

confidence: 99%

The Theoretically Studies and Field Testing of Self-Insulation Exterior Wall in the Hot Summer and Cold Winter Zone

Yu¹,

Xu²,

Zhang³

et al. 2017

EPE

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The energy efficiency design of the exterior wall in the buildings of the hot summer and cold winter zone of China should consider the heat prevention in summer and the heat insulation in winter. The self-insulation of the exterior wall is a more feasible design to satisfy the energy efficiency of buildings in the zone. However, the systematic research is urgently needed for the self-insulation of the exterior wall in the hot summer and cold winter zone of China. The paper tested the thermal performance of the common non-clay materials such as shale sintered hollow brick, sand autoclaved aerated concrete block, etc. by means of indoor experiments. The energy efficiency effect of the common materials was verified using dynamic calculation soft PKPM and several constitutions of exterior wall with different main bricks and insulation materials on the heat bridge were simulated, too. Besides, the tests of the thermal performance of exterior wall in real constructions were carried out to testify the practical effect of the recommended constitutions of exterior wall with different main bricks and insulation materials on the heat bridge. The conclusions are: the physical and thermal properties of the six non-clay wall material are better than the clay porous brick; the thermal performance of the non-clay brick can be improved obviously through the rational arrangement of the holes; shale sintered hollow brick after increasing the holes and rationalizing the hole arrangement and sand autoclaved aerated concrete block are recommended for buildings in the hot summer and cold winter area of China. The dynamic calculation results show that the thermal performances of the non-clay materials are all satisfied with the energy efficiency; The heat transfer coefficient of the exterior wall with composition ③, in which the main wall was sand autoclaved aerated concrete block and the material on the heat bridge was sand autoclaved aerated concrete plate, is the smallest among the three recommended compositions.

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Comparative assessment of internal and external thermal insulation systems for energy efficient retrofitting of residential buildings

Cited by 195 publications

References 31 publications

Case studies of cavity and external wall insulation retrofitted under the Irish Home Energy Saving Scheme: Technical analysis and occupant perspectives

Case studies of cavity and external wall insulation retrofitted under the Irish Home Energy Saving Scheme: Technical analysis and occupant perspectives

In-Situ Monitoring of the Effect of External Environment on a Contemporary Building in Prague: The Performance of the Additional Thermal Insulation System

The Theoretically Studies and Field Testing of Self-Insulation Exterior Wall in the Hot Summer and Cold Winter Zone

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