Nowadays, the disposal of wind turbine blades (WTB) represents a significant challenge due to their complex construction and massive size. The reuse of decommissioned WTB in the construction sector has emerged as a promising solution that can reduce waste and create a circular economy for the valuable materials contained therein. This paper studies the possibility to reuse the main structural components of a WTB as roof beam for a multisport pavilion. The approach relies on reusing the main load carrying component of the blade (i.e., the spar caps plus shear webs) as an overhanging beam, with the thinner part of the blade cantilevered. A structural analysis was carried out using a detailed numerical model considering a WTB from the Siemens Gamesa G90–2.0 MW wind turbine, with a total blade length of 44 m. The model takes into account the actual cross section geometry along the blade length as well as the material properties and the stacking sequence of the laminates. The commercial finite element software ABAQUS is used to accurately predict the stress and deformation distribution of the blade structure acting as an overhanging beam. The preliminary results of this study show potential suitability for the WTB to be reused as beams in roof structures considering bending stresses.