The Cargojet Boeing 757-200 was operating as W8/CJT620 on a cargo flight from Halifax to St. John’s, Canada. The aircraft landed at 07:41 and was cleared to taxi to Apron 2 via C taxiway. The winds at 07:45 were reported as 260 at 30, gusting 42 knots. The crew positioned the aircraft facing north on the apron to await marshallers for parking guidance. The aircraft was marshalled for a right 180ø turn, but was unable due to the tendency for the aircraft to weathercock. The crew requested ATS clearance to taxi north on the apron where the aircraft was able to make the turn and return south to park. Before the aircraft came to a stop in the parking spot, it began to slide laterally to the left on all landing gear. The crew shut down both engines and the aircraft continued to slide laterally over 60m where the left wing tip penetrated a building, entering approximately 2.5m span wise. The 07:37 airport field report identified conditions as 80% ice, 20% bare / wet, chemically treated and sanded.