Air leakage into the frosted I have the complete preliminary check found that the pipe cover insulation Duct degeneration (external heat can cause. Condensation) solutions are needed to cover the new insulation, it would resolve this problem.
Air leaking into the ceiling I have found that out. Duct insulation, pipe insulation deterioration (external heat may be causing condensation) solution is to have a new thermal insulated so solve this problem here.
Air leakage into the ceiling, I've found that the preliminary check The insulation pipe cover Duct deteriorate (hot outside to cause condensation) solution is to insulated hot new, thus solves this problem. It