The need of new houses is continuously increasing as an effect of an increase in thepopulation in cities. In 2017, the construction sector was accounted for 19% ofSweden's total greenhouse gas emissions, which corresponded to approximately 12.2million tonnes of carbon dioxide emissions. As a reaction to this, new guidelines wereset by the government to build more climate-friendly and sustainable, which has formedthe basis for this report.

In collaboration with Forshedahus, this study has been carried out where the aim of thestudy is to create an overview of the environmental impact of prefabricated foldingwalls and make suggestions for improvement alternatives. The report has also examinedthe economic effect of the improvement alternatives on the company. The method usedin the implementation has been an in-depth literature study and a case studysupplemented with interviews of designers at Forshedahus. Two different projects andtheir respective unfolding walls have been investigated and analysed based on the LCAmethod and it has been shown that the use of YV170 shows better values when it comesto carbon dioxide equivalent per m2 wall where YV170's climate impact is about 34 kgCO2 eq. per m2 wall and YV195's climate impact is 39 kg CO2 eq. per m2 wall.

The environmental impact can also be reduced at three different stages, from theconstruction stage to the final stage with four different improvement proposals. Thefirst improvement alternative takes place when purchasing materials, where purchasingmaterials with better EPDs and less climate impact should be preferred. The secondimprovement proposal is to make maximum use of the cargo area when deliveringunfolding walls to reduce both transport emissions and transport costs. Duringconstruction, it is proposed that the upsetting machine be used to reduce material waste.Another improvement alternative is to recommend and clarify to the customer thatwooden studs instead of steel studs have proven to be more environmentally friendly atwindow and door openings. There are economic differences that can be difficult toapply when, for example, purchasing materials where the choice of material is based ondifferent components than just environmental thinking.