HUR PÅVERKAS MILJÖN NÄR ICKE FÖRNYBARA BYGGMATERIAL ERSÄTTS MED FÖRNYBARA? - GÖR DET NÅGON SKILLNAD?

Sammanfattning: According to Boverket - The Swedish National Board of Housing, Building and Planning, 21 percent of greenhouse emissions are caused by the Swedish building industry. To make a change the building industry should focus more on sustainable building. The main cause of greenhouse emissions within the construction sector is caused by extracting the raw materials, transport, and manufacturing of material. To build sustainably, nonrenewable materials can be changed to renewable materials to reduce greenhouse emissions. An example is to change plastic with windproof board. Wood is a good example of a renewable material.  In this study, the house Astrid, which is a turnkey house from Älvsbyhus, was analysed. The house Astrid has a living area of 107 m2 including three rooms and a kitchen. The purpose is to get a wooden house which is equivalent to the house Astrid when it comes to energy performance, but with a lower greenhouse emission by changing nonrenewable material to wood products. The method used was to firstly inventory the house Astrid and to be able to see which materials that could be changed. Through research and gathering information, alternative material and other relevant facts were found. Then the average heat transfer coefficient - Um was calculated. Where Um for both houses must be equal to be able perform the materials change without affecting the construction. Afterwards, an Environmental Product Declaration- EPD were used to see the different products' environmental impact.  The results showed that the Um became the same which means that the energy performance is equal both houses. The renewable materials contributed to reducing the greenhouse emission of the new house. The conclusion shows that the studied materials’ environmental impact for the house Astrid decreased with up to 41 percent.