In building durably, we do our best to avoid condensation from forming where its not managed or wanted. As an example, when insulating heat pump or AC refrigerant lines, a quality, high R-value, seamless foam sleeve is standard practice in the HVAC industry.
By and large, the factory supplied pre-assembled units work fairly well, but in talking to Passive Home builder Ed Marion last week, he observed the darnedest thing; condensation forming at hangers and zip-ties where the insulation was compressed. The thermal bridge created at each compressed are was enough to precipitate water out of the air and cause puddles on the ground. Perhaps its worth using a wide band, durable tape to tie the lines together and use a hanger with a wider supporting face…
Though not present in the photo above, Ed Marion noticed condensation forming on his refrigerant line where the foam insulation was compressed at hangers and zip-ties.