Renovating the Housing Stock Built Before 1945: Exploring the Relations Between Energy Efficiency, Embodied Energy and Heritage Values
Paper i proceeding, 2018

Swedish multi-family buildings constructed before 1945 constitutes an important part of the national built heritage. However, the majority does not have a formal heritage protection. Part of this building stock has already been renovated, notably through earlier energy saving programmes where additional exterior insulation, new façades and windows were frequently installed with little consideration for the original architecture. Now, 40 years later, these buildings face new renovations. This provides opportunities to improve the energy efficiency, indoor climate and user comfort. At the same time, the original architectural and historical characters lost in previous renovations could be recreated. In this paper, an inter-disciplinary research team illustrates the challenges met in practice to reach a sustainable renovation based on three cases. The case buildings are so-called "Landshövdingehus”, constructed in the 1930s and owned by a public housing company. The relations between building physics, energy efficiency, embodied energy, and the effect on heritage aspects in renovation are studied. The results demonstrate the potential to reach 30% calculated energy efficiency without investing in ventilation systems. When comparing embodied energy to savings in operational energy a short payback time is achieved. However, focusing on the replacement of windows, the cases illustrate difficulties to recreate heritage values at same time as achieving an air-tight and energy efficient construction. In order to improve the results from a heritage point of view, there is a need for quality assurance of the renovation and building permit process.

Heritage values

Multi-family buildings

Energy efficiency

Value conflicts

Embodied energy

Författare

Paula Femenias

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsdesign

Liane Thuvander

Forskning - Arkitekturens teori och metod

Pär Johansson

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Paula Wahlgren

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Petra Eriksson

Uppsala universitet

Proceedings of Cold Climate HVAC 2018, Kiruna, Sweden, 12-15 March, 2018

Cold Climate HVAC 2018
Kiruna, Sweden,

Om-renovering: Möjligheten att öka energieffektiviteten och återskapa kulturhistoriska värden

Energimyndigheten, 2015-11-01 -- 2018-12-31.

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures

Energi

Ämneskategorier

Byggproduktion

Miljöanalys och bygginformationsteknik

Husbyggnad

Mer information

Skapat

2018-10-31