WOOD, PLASTIC AND BIO- BASED COMPOSITES AS BUILDING MATERIALS ‘Are plastic or bio-based composites more beneficial than wood as building material for the barrier on ecoduct Koekendaal considering sustainability and costs?’ ABSTRACT In this research an analysis on wood, plastic and bio- based composites is done. All three building materials are compared to each other based on their sustainability and costs. These building materials are the three options for a barrier mounted on to ecoduct Koekendaal, so the advice and conclusion are specified to this project. A Life Cycle Costing and Multi-Criteria Analysis is done to compare the alternatives. K.T.J. Burghouts Civil Engineering 14-6-2019 Supervisors - G.H. Snellink (UT) - M. Menninga (BAM)