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Norén, J., Pousette, A. & Sandberg, K. (2019). Moisture Safety of Tall Timber Facades—LCA and LCC Calculations of Damage Scenarios. In: Johansson, Dennis; Bagge, Hans; Wahlström, Åsa (Ed.), Cold Climate HVAC 2018: . Paper presented at 9th Int Cold Climate Conference. Kiruna, Sweden. 12-15 March, 2018. (pp. 933-943).
Open this publication in new window or tab >>Moisture Safety of Tall Timber Facades—LCA and LCC Calculations of Damage Scenarios
2019 (English)In: Cold Climate HVAC 2018 / [ed] Johansson, Dennis; Bagge, Hans; Wahlström, Åsa, 2019, p. 933-943Conference paper, Published paper (Refereed)
Abstract [en]

The use of timber structures in tall buildings increases the demand of moisture safety in facades. Moisture in the facade could result in unwanted consequences such as mold, decay and distortions in wood materials. This might have impact on the indoor climate and the building quality. The aim of this study was to evaluate the moisture safety regarding the composition of the façade and connection details such as windows and balconies. Scenarios with possible damages were evaluated with LCC (Life Cycle Cost) and LCA (Life Cycle Assessment). The scenarios were developed based on experiences from manufacturers and insurance companies and on research investigations of damages. LCC and LCA includes replacement of damaged building materials, transports of new materials and damaged materials for recycling or energy recovery and the use of energy for drying of moisture in the structure. Both light frame structures and CLT (Cross Laminated Timber) structures were included. Improvements of detail connections to increase moisture safety were also evaluated regarding risk of damage, costs and environmental impact. The results show that even small and inexpensive improvements will increase the moisture safety and significantly reduce the risk of damage.

National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-37732 (URN)10.1007/978-3-030-00662-4_79 (DOI)978-3-030-00661-7 (ISBN)
Conference
9th Int Cold Climate Conference. Kiruna, Sweden. 12-15 March, 2018.
Available from: 2019-02-13 Created: 2019-02-13 Last updated: 2019-08-15Bibliographically approved
Sandberg, K., Gustafsson, A., Pousette, A., Norén, J. & Soleimani-Mohseni, M. (2019). Renovation of an Office Building with Prefabricated Wooden Element—Case Hedensbyn. In: Johansson, Dennis; Bagge, Hans; Wahlström, Åsa (Ed.), Cold Climate HVAC 2018: . Paper presented at 9th Int Cold Climate Conference. Kiruna, Sweden. 12-15 March 2018 (pp. 587-598).
Open this publication in new window or tab >>Renovation of an Office Building with Prefabricated Wooden Element—Case Hedensbyn
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2019 (English)In: Cold Climate HVAC 2018 / [ed] Johansson, Dennis; Bagge, Hans; Wahlström, Åsa, 2019, p. 587-598Conference paper, Published paper (Refereed)
Abstract [en]

There is a major need of cost-effective renovation that leads to lower energy consumption and better environment. This article shows the results from a pilot case of a newly developed prefabricated building system. It is an industrially prefabricated insulated wooden element adapted to renovation and upgrading of building envelopes. The renovated building is a one-story office building located in Skellefteå in the north of Sweden. Energy performance, thermal bridges, risk of moisture problems, LCA, applicability of the renovation method and assembly time were evaluated during the planning and execution of the renovation. Results from this case show that the elements were very light and easy for one person to handle at the building site. There is a great potential to reduce assembly time with improved joints and element sizes adapted to the building as well as improved batch packaging from the factory. With 100 mm insulation, the renovation gives a certain energy savings, and LCA calculations show that the reduction of climate impact due to reduced heating energy used during a service life 50 years corresponds to the climate impact of the renovation measures. The risk of microbial growth can be regarded as small.

National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-37731 (URN)10.1007/978-3-030-00662-4_49 (DOI)978-3-030-00661-7 (ISBN)
Conference
9th Int Cold Climate Conference. Kiruna, Sweden. 12-15 March 2018
Available from: 2019-02-13 Created: 2019-02-13 Last updated: 2019-08-09Bibliographically approved
Sandberg, K., Pousette, A. & Östman, L. (2018). Concept for renovation of facades with prefabricated wood elements. Skellefteå
Open this publication in new window or tab >>Concept for renovation of facades with prefabricated wood elements
2018 (English)Report (Other academic)
Abstract [en]

There is a major need of cost-effective renovations that lead to lower energy consumption and better environment. The aim of a Nordic built project was to develop a concept for industrially prefabricated insulated elements for renovation and upgrading of building envelopes. The project with participants from Sweden, Finland and Norway focused on increased prefabrication based on wood for a sustainable solution. This report presents results from the project including a Swedish pilot case with the newly developed prefabricated building system. The prefabricated wood elements are produced by Termowood in Norway. Several studies have been done about renovation of facades, including attitudes and costs, and about important properties of the element system, for example energy savings, thermal bridges, moisture risks, environmental impacts, production and installation.

The renovated building in the pilot case is a one-storey office building located in Skellefteå in the north of Sweden. Energy performance, thermal bridges, risk of moisture problems, LCA, applicability of the renovation method and assembly time were evaluated during the planning and execution of the renovation. Results from this pilot case showed that the elements were very light and easy for one person to handle at the building site. There is a great potential to further reduce the assembly time on site with improved joints and element sizes adapted to the building as well as improved batch packaging from the factory. With 100 mm insulation, the renovation gives a certain energy saving. LCA calculations showed that the reduction of climate impact due to energy savings during a service life of 50 years corresponds to the climate impact of the renovation measures. With a thicker insulation, the reduction in climate impact during the use phase of the building would increase more than the climate impact of the renovation. There is also a potential to reduce climate impact from the wall element by selecting materials produced closer to the element factory and with a greater share of renewable energy.

Place, publisher, year, edition, pages
Skellefteå: , 2018. p. 28
Series
RISE Rapport ; 2018:26
Keywords
Façade renovation, Building envelope, Prefabricated wood element, Energy efficiency, Thermal bridge, Insulation, Climate impact, Retrofitting
National Category
Building Technologies
Identifiers
urn:nbn:se:ri:diva-35137 (URN)978-91-88695-63-5 (ISBN)
Funder
Nordic Council of MinistersSwedish Energy AgencySwedish Research Council FormasEuropean Regional Development Fund (ERDF)
Available from: 2018-09-07 Created: 2018-09-07 Last updated: 2018-09-11Bibliographically approved
Sandberg, K., Pousette, A., Norén, J., Sandberg, M., Olofsson, T. & Mukkavaara, J. (2018). Hållbarhetsutvärdering av byggnader - Case Ripan i Kiruna.
Open this publication in new window or tab >>Hållbarhetsutvärdering av byggnader - Case Ripan i Kiruna
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2018 (Swedish)Report (Other academic)
Abstract [en]

Sustainability includes several parameters, and these can be measured and valued in many different ways. This study focuses on balancing the various parts to achieve sustainability by minimizing energy for heating and energy to produce the materials used in the building as well as minimizing cost for material investment and cost for heating using optimization techniques. This is balanced together with the environmental impact. This report describes an initial study for sustainability optimization of a smaller building. The goal is to develop a comprehensive approach to provide a broader basis of decisions for new construction.

The calculation included the building envelope (exterior walls, roof and floors), interior walls and stabilizing elements for different frames of wood (timber frame and CLT).

The result from the Ripan Case shows that the timber frame design has the lowest embodied energy and operating energy, and lowest cost for investment and heating during the operating phase. The environmental impact of the timber frame design was also low.

Abstract [sv]

Hållbarhet innefattar flera parametrar och dessa kan mätas och värderas på många olika sätt. Att väga ihop de olika delarna för att uppnå hållbarhet genom att minimera förbrukad energi för uppvärmning och energi för att producera material till bygget samt investeringskostnader för material och kostnader för uppvärmning är fokus i denna rapport. Detta vägs samman med miljöpåverkan. En inledande studie för hållbarhetsoptimering av en mindre byggnad är genomförd med målet är att utveckla en övergripande metod för att ge bredare beslutsunderlag vid nybyggnad.

Beräkningar av inbyggd energi, driftsenergi, investerings- och uppvärmningskostnader har genomförts för ett planerat hus på Camp Ripan i Kiruna. I beräkningen av byggnaden inkluderades klimatskärm (ytterväggar, stomstabiliserande element och grund) för två olika stommar av trä (träregelstomme och KL-trä). För miljöberäkningarna användes främst indata från EPDer och resultatet redovisas i form av klimatpåverkan, CO2-ekvivalenter.

Den utvecklade metoden ger potential för bättre ekologisk och ekonomisk hållbarhet genom ett optimerat val av byggnadsmaterial för byggnader. Optimeringsalgoritmen ger förslag på byggnadsmaterial med minst energiåtgång vid produktion, den sk inbyggda energin, samt vid uppvärmning under driftsfasen samt lägst kostnader. Miljöaspekten vägs också in i bedömningen för att få ett mer heltäckande beslutsunderlag för beställare och projektörer. Metoden är tänkt att i fortsatta studier vidareutvecklas för användning på mer komplexa byggnader som till exempel flerbostadshus.

Resultatet från Case Ripan visar att regelkonstruktionen har lägst inbyggd energi, driftsenergi, investeringskostnad samt kostnad för uppvärmning under driftsfasen. Även miljöpåverkan från regelkonstruktionen var låg.

Publisher
p. 33
Series
RISE Rapport ; 2018:79
Keywords
Sustainability, low energy house, energy optimization, LCA, timber house
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-37853 (URN)978-91-88907-33-2 (ISBN)
Funder
Swedish Agency for Economic and Regional GrowthVinnova
Available from: 2019-02-28 Created: 2019-02-28 Last updated: 2019-04-05Bibliographically approved
Norén, J., Pousette, A. & Sandberg, K. (2017). Moisture safety of tall timber facades. Borås
Open this publication in new window or tab >>Moisture safety of tall timber facades
2017 (English)Report (Other academic)
Abstract [en]

Moisture safety of tall timber facades

The main purpose of the project was to facilitate safe design of sustainable and cost-effective solutions for wood facades of high-rise buildings. Studies have been carried out of different designs of the wall itself and of different details in the wall. Direct and indirect consequences of moisture damage have been considered but mainly risk of mould or decay. Façade details with high risk were identified e.g. window and balcony, and the types of damage that may occur, and what the consequences may be. Based on this, some damage scenarios were selected where detailed solutions were analysed more carefully. Details were also compared with modified designs with improvements such as addition of a sealing strip or plate covering. LCA and LCC have been calculated for some damage scenarios to show consequences of damages and the importance of well-executed designs and details.

Place, publisher, year, edition, pages
Borås: , 2017. p. 47
Series
SP Rapport, ISSN 0284-5172 ; 2017:38
Keywords
timber facades, tall facades, moisture safety, wood moisture, damage scenarios, LCA, LCC
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-33483 (URN)
Projects
Tall Timber Facades
Funder
VINNOVA
Available from: 2018-03-09 Created: 2018-03-09 Last updated: 2018-08-20Bibliographically approved
Ohman, M. B., Sandberg, K. & Pousette, A. (2016). Dimensional stability in four different wooden facade claddings. In: WCTE 2016: World Conference on timber engineering. Paper presented at World Conference on timber engineering (WCTE 2016), August 22-25, 2016, Vienna, Austria (pp. 2810-2818).
Open this publication in new window or tab >>Dimensional stability in four different wooden facade claddings
2016 (English)In: WCTE 2016: World Conference on timber engineering, 2016, p. 2810-2818Conference paper, Published paper (Refereed)
Abstract [en]

The hypothesis is that a good cladding system in wood should be characterized by a homogeneous dimensional behaviour with minimal variation between individual panel boards to minimize maintenance, i.e. repainting or, in the worst case, replacement of whole panels. Four different types of cladding panels were tested: a regular spruce panel, a quality-sorted P-marked spruce panel, a regular panel of pine heartwood and a spruce glulam panel, 50 panels of each type. The objective was to study the dimensional changes under changing moisture conditions in order to find the cladding material with the smallest possible dimensional and distortion movements. The shape stability of the panels was measured and expressed in terms of bow, spring, twist and cupping. The spruce glulam panels showed the best shape stability, proven significantly different in comparison to the other two spruce panel systems. Panels of pine heartwood showed a tendency greater dimensional stability than the spruce panels, but not enough to be considered statistically significantly different in this study.

National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-16283 (URN)978-3-903024-35-9 (ISBN)
Conference
World Conference on timber engineering (WCTE 2016), August 22-25, 2016, Vienna, Austria
Available from: 2016-10-19 Created: 2016-10-19 Last updated: 2019-06-24Bibliographically approved
Sandberg, K. & Frände, N. (2016). Internet pages Sweden (ed.). Paper presented at .
Open this publication in new window or tab >>Internet pages Sweden
2016 (English)Report (Refereed)
Series
SP Rapport, ISSN 0284-5172 ; 2016:09
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-5303 (URN)30801 (Local ID)30801 (Archive number)30801 (OAI)
Available from: 2016-09-07 Created: 2016-09-07 Last updated: 2018-08-17Bibliographically approved
Sandberg, K., Orskaug, T. & Andersson, A. (2016). Prefabricated Wood Elements for Sustainable Renovation of Residential Building Façades. Paper presented at SBE16 Tallinn and Helsinki Conference: Build Green and Renovate Deep, October 5-7, 2016, Tallinn/Helsinki, Estonia/Finland. Energy Procedia, 96, 756-767
Open this publication in new window or tab >>Prefabricated Wood Elements for Sustainable Renovation of Residential Building Façades
2016 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 96, p. 756-767Article in journal (Refereed) Published
Abstract [en]

Prefabricated elements to provide environmentally friendly, energy- and cost-efficient solutions for the building envelope have been studied. The newly developed element system has a high level of flexibility since it is possible to adjust the length of the connection rods according to the building's energy requirements and it can be mounted on timber, concrete and brick structures. Adjustability to different types of buildings structures, materials, tolerances, geometries and energy requirements makes it very applicable and efficient.

Keywords
renovation, prefabricated wood element, building envelopes, façade renovation, energy efficiency
National Category
Environmental Analysis and Construction Information Technology
Identifiers
urn:nbn:se:ri:diva-26194 (URN)10.1016/j.egypro.2016.09.138 (DOI)2-s2.0-85006367936 (Scopus ID)
Conference
SBE16 Tallinn and Helsinki Conference: Build Green and Renovate Deep, October 5-7, 2016, Tallinn/Helsinki, Estonia/Finland
Available from: 2016-11-22 Created: 2016-11-22 Last updated: 2019-06-17Bibliographically approved
Sandberg, K., Glas, B., Frände, N. & Nakano Hylander, A. (2016). Websites for energy efficient and sustainable renovation in Sweden.
Open this publication in new window or tab >>Websites for energy efficient and sustainable renovation in Sweden
2016 (English)Report (Other academic)
Publisher
p. 38
Series
SP Rapport, ISSN 0284-5172 ; 2016:09
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-28220 (URN)
Available from: 2017-02-17 Created: 2017-02-17 Last updated: 2019-02-07Bibliographically approved
Pousette, A. & Sandberg, K. (2015). TallTimber Facades – utveckling av kostnadseffektiva och säkra klimatskal för träbyggande (ed.). Bygg & teknik, 107(8), 40-42
Open this publication in new window or tab >>TallTimber Facades – utveckling av kostnadseffektiva och säkra klimatskal för träbyggande
2015 (Swedish)In: Bygg & teknik, Vol. 107, no 8, p. 40-42Article in journal (Other academic) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-8261 (URN)29473 (Local ID)29473 (Archive number)29473 (OAI)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2018-08-21Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-0006-9425

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