LCA of timber and steel buildings with fuzzy variables uncertainty quantificationLCA of timber and steel buildings with fuzzy variables uncertainty quantification Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2018-03-292017enSteel and timber structures constitute a construction technology which holds significant potential in terms of sustainability and are therefore selected as sustainable solutions for the construction of housing, commercial or other types of building projects. This paper consists of two parts. Firstly, to quantify the sustainability potential of timber and steel construction by calculating the environmental impact caused throughout the life cycle of a steel-framed residential building and a timber building. The calculation has been extended with the usage of fuzzy variables that represent uncertainty of the various parameters involved. http://creativecommons.org/licenses/by/4.0/European Journal of Environmental and Civil Engineering2191128-1150 Kaziolas, Dimitrios N Zygomalas, Iordanis Stavroulakis Georgios Σταυρουλακης Γεωργιος Baniotopoulos, Charalambos C Taylor & Francis Environmental impact Fuzzy variables LCA Life-cycle assessment Steel structures Sustainable development Timber structures