Hållbara klimatskärmar med hampa och cellglas : - En fallstudie

Sammanfattning: Human activity is the primary cause of climate change, particularly through the emission of greenhouse gases. The construction industry is one of the sectors that significantly contributes to the increasing amount of greenhouse gases in the atmosphere, and sustainable building materials can be part of the solution to this problem. This report analyzes the climate impact and cost of constructing building envelopes using materials of hemp and cellular glass compared to conventional ones from a life cycle perspective. The study includes a case study of a single-family house Hällebol. The focus of the study is the life cycle analysis of the production stage (A1-A3) and the end of life stage (C1-C4). The study demonstrates that building envelopes of hemp and cellular glass contribute to a lower level of climate impact compared to those made from conventional building materials. It also indicates that building envelopes of hemp and cellular glass can be more expensive alternatives than conventional ones, but the cost may vary depending on the specific conventional materials chosen. Furthermore, the study highlights the significant role of biogenic carbon storage in hemp cultivation in reducing overall climate impact. The rapid growth characteristics of hemp enable it to absorb substantial amounts of carbon dioxide through photosynthesis during the growth phase. If carbon storage is included in the assessment, the climate impact of climate barriers decreases significantly. The choice of materials in a climate barrier should be based on prioritized aspects in the specific context and the trade-off between climate impact and cost considerations.