A cabinet assembly for a refrigerating appliance includes an inner liner having a forward liner edge. The forward liner edge defines an access opening. An outer wrapper is disposed around the inner liner and has a forward wrapper edge. The outer wrapper is spaced-apart from the inner liner to define an insulating cavity therebetween. A mullion assembly extends across the access opening. A trim breaker extends about the access opening and is coupled to the forward wrapper edge and the forward liner edge to seal the insulating cavity. The trim breaker includes a spacing flange positioned to contact the mullion assembly to define a receiving space between the trim breaker and the mullion assembly.