Air Leakage of Joints Filled with Polyurethane Foam

Hallik, Jaanus; Gustavson, Heleen; Kalamees, Targo

doi:10.3390/buildings9070172

Cited by 12 publications

(6 citation statements)

References 12 publications

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“…They presented the results of their work in [38]. Hallik et al conducted research on air leaks through various wooden joints filled with three different polyurethane foams [39]. Kalamees et al measured air leakage levels for eight joints that were used for various sealing solutions in a prefabricated timber envelope structure [40].…”

Section: Review Of the Literaturementioning

confidence: 99%

Assessment of the Possibility of Using Various Types of Renewable Energy Sources Installations in Single-Family Buildings as Part of Saving Final Energy Consumption in Polish Conditions

Wróblewski

Niekurzak

2022

Energies

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The aim of this work is to develop a model of heat supply to buildings with almost zero energy consumption, indicating the significant importance of heat losses and gains in heating installations. The prepared model is to indicate the need for changes in the structure and topology of heating installations, resulting from the changing heat demand of buildings. The need to create a new model is heightened by changes that relate to tightening legal regulations related to energy consumption and demand, which must meet the standards of buildings in Poland from 2021. The article presents the assumptions and results of analyses of the use of energy installations in residential buildings that use renewable energy sources to balance energy consumption in various areas of its use. To achieve this goal, calculations were made using simulations of the impact of the use of installations using renewable energy sources on the energy performance of a building with different quality of partitions and improvement of energy efficiency in accordance with the Polish standard PN-EN 12831. The test results allow to choose the most advantageous, from the point of view of economic profitability, option of replacing installations in residential buildings, and they also allow to determine the possibilities of meeting national obligations in the field of final energy reduction and increasing the share of renewable energy sources in meeting its demand in accordance with the EU obligations imposed on Poland. Thermomodernization of buildings in the temperate climate zone allows for a reduction of 38% of energy demand over the entire life cycle of a building and a reduction of CO2 emissions by 99%.

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Section: Review Of the Literaturementioning

confidence: 99%

Assessment of the Possibility of Using Various Types of Renewable Energy Sources Installations in Single-Family Buildings as Part of Saving Final Energy Consumption in Polish Conditions

Wróblewski

Niekurzak

2022

Energies

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“…From the thermal insulation and energy saving point of view, many studies investigated the indoor thermal conditions and overheating risks in prefabricated timber buildings: Chang et al analyzed the thermal properties and heat transfer performance of ply-lam CLT [46]; Wang and Ge looked into the evaluation of the hygro-thermal performance of CLT wall assemblies through simulations, using a stochastic approach to account for the uncertainty of material properties, boundary conditions, and environmental loads [47]; Hallik et al analyzed the air leakage of joints filled with polyurethane foam and its influencing factors [48].…”

Section: Overview On Basic Research On Clt Systemsmentioning

confidence: 99%

“…In the case of CLT constructions, panels are necessarily watertight and can therefore be considered as an airtight layer with the interposition of a vapor barrier on the hot side of the insulating layer. Particular attention should be paid to the joints among the elements, where the airtightness is guaranteed by a sealing joint cover [48].…”

Section: Characteristic Properties Of Clt Systemsmentioning

confidence: 99%

“…A thermal bridge is determined when there is no material continuity in the building envelope or there is a sudden change in geometry. In the envelope of wooden building, the material continuity between the insulating elements cannot always be guaranteed, but must be sought as much as possible [48], mainly at the joints of the panels for CLT structures.…”

Section: Characteristic Properties Of Clt Systemsmentioning

confidence: 99%

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Acoustic Characteristics of Cross-Laminated Timber Systems

Bella

Mitrović

2020

Sustainability

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The growing diffusion of cross-laminated timber structures (CLT) has been accompanied by extensive research on the peculiar characteristics of this construction system, mainly concerning its economic and environmental benefits, lifecycle, structural design, resistance to seismic actions, fire protection, and energy efficiency. Nevertheless, some aspects have not yet been fully analysed. These include both the knowledge of noise protection that CLT systems are able to offer in relation to the possible applications and combinations of building elements, and the definition of calculation methods necessary to support the acoustic design. This review focuses on the main acoustic features of CLT systems and investigate on the results of the most relevant research aimed to provide key information on the application of acoustic modelling in CLT buildings. The vibro-acoustic behaviour of the basic component of this system and their interaction through the joints has been addressed, as well as the possible ways to manage acoustic information for calculation accuracy improvement by calibration with data from on-site measurements during the construction phase. This study further suggests the opportunity to improve measurement standards with specific reference curves for the bare CLT building elements, in order to compare different acoustic linings and assemblies on the same base. In addition, this study allows to identify some topics in the literature that are not yet fully clarified, providing some insights on possible future developments in research and for the optimization of these products.

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“…This is in line with the trend observed for many years of wide, on site use of polyurethane foam in construction [ 12 , 13 ]. Apart from standard applications such as roof insulation [ 14 ] or window and door fitting [ 15 ], on-site foaming polyurethane adhesives are used to bond masonry elements in wall construction [ 16 , 17 ]. Polyurethane adhesives have numerous advantages, such as effective wetting of most substrates; interaction with substrates through polar interactions (hydrogen bonding); and relatively low molecular weight/small molecular size, which allows them to permeate porous substrates and to form covalent bonds with substrates that have active hydrogen atoms [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Polyurethane Adhesive Bonds in a Mineral Wool-Based External Thermal Insulation Composite System for Timber Frame Buildings

Sudol

Kozikowska

2021

Materials

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This paper aims to provide a preliminary assessment of polyurethane adhesive applicability as an alternative to conventional cement-based adhesives used to fix thermal insulation materials to substrates concerning mineral wool-based external thermal insulation composite systems. Currently, polyurethane adhesives are only used in expanded polystyrene-based ETICS. This study discusses the suitability of polyurethane adhesive for ETICS with lamella mineral-wool for timber frame buildings. Bond strength, shear strength and shear modulus tests were conducted. In addition, microstructure and apparent density were analysed. Mechanical properties were analysed in terms of the influence of substrate type and thermal and moisture conditions, taking into account solutions typical for sheathing on timber frame (oriented strand boards (OSB), fibre-reinforced gypsum boards (FGB) and cement-bonded particleboards (CPB)), as well as limit conditions for adhesive application. It was found that PU adhesive can achieve adhesion, both to MW and OSB, and FGB and CPB at ≥ 80 kPa, which is considered satisfactory for PU adhesives for EPS-based ETICS. Favourable shear properties were also obtained. There was no significant effect of sheathing type on the properties considered, but the influence of temperature and relative humidity, in which the bonds were made, was spotted. The results obtained can be considered promising in further assessing the usefulness of PU adhesives for MW-based ETICS.

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Air Leakage of Joints Filled with Polyurethane Foam

Cited by 12 publications

References 12 publications

Assessment of the Possibility of Using Various Types of Renewable Energy Sources Installations in Single-Family Buildings as Part of Saving Final Energy Consumption in Polish Conditions

Assessment of the Possibility of Using Various Types of Renewable Energy Sources Installations in Single-Family Buildings as Part of Saving Final Energy Consumption in Polish Conditions

Acoustic Characteristics of Cross-Laminated Timber Systems

Mechanical Properties of Polyurethane Adhesive Bonds in a Mineral Wool-Based External Thermal Insulation Composite System for Timber Frame Buildings

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