Abstract: A first building panel (110) and at least a second building panel (120) fixed to a building substructure (300) in a predetermined arrangement thereby forming a joint profile (150). Each of the first and at least second building panel comprise a first profiled side edge (140) and a second profiled side edge (145) which are of complementary configuration such that the first profiled side edge of the first building panel is configured to engage with the second profiled side edge of the at least second building panel. The first and second profiled side edge being further configured to form an engineered adhesive reservoir (155) therebetween when the first profiled side edge and second profiled side edge are engaged together. The joint profile further comprising a structural adhesive (285) at least substantially filling the engineered adhesive reservoir.