The object of research is a structural silicone adhesive sealant. This work aims to identify the factors affecting the stress–strain state of the bonded joint in facade structures with vertically bonded cladding using numerical and analytical calculation methods. Method. As part of the conducted study, a numerical assessment of the performance of the bonded connection was carried out. Four computational models of the bonded connection were developed, each with a different level of detail in simulating the ventilated façade system with vertically bonded cladding. The shear and normal stresses obtained from the numerical simulations were compared with the values specified in accordance with the requirements of the regulatory document ETAG 002. Results. Numerical analyses accounting for the facade substructure show that the inclusion of hanger connections, brackets, and guide profiles has a significant impact (up to 15 %) on the magnitude and distribution pattern of shear stresses within the bonded connection under self‑weight loading. It is proposed that the load‑bearing capacity of the bonded connection in facade systems with vertically bonded cladding under wind pressure be evaluated using a numerical method based on a detailed model that considers the stiffness and arrangement of hanger connections and brackets. This recommendation is made because the structural configuration and the placement of brackets exert a substantial influence (up to 40 %) on the stress–strain state of the bonded connection.