My contractor has run out of ideas about my leak so I thought I'd ask here in desperation to see if anyone has any thoughts.
Please see here for photos https://imgur.com/a/t4OGXkw
- my roof is a flat rooftop deck with the heat pump on the roof
- the heat pump has a hose that goes through a parapet wall (shown in the pictures) which is above my leak
- I've been watching a crack ceiling patch grow over time for 1-2 years now, testing it with a moisture meter and noticing it gets wet from time to time
- my contractor initially "fixed" it by tearing off the metal flashing of the parapet and sealing it up "correctly" as it looked like there were gaps where water could get in
- the leak was dripping wet when it was raining hard about a month ago but since then it does not seem to get wet during heavy rain
What we found:
- my contractor tore up the siding and flashing of the parapet wall but it all looked try
- they opened up the drywall ceiling and saw there was a evidence of a puddle concentrated to the area beneath the hose of the heat pump but it was dry now
- the insulation around the heat pump was also dry, but there were a couple brown spots on the insulation directly underneath the hose which they say indicate it was wet at one point
- there appears to be no evidence of water trickling in from outside
Grasping at theories:
- I have heard of the heat pump hoses possibly having condensation, does that seem like a possibility?
- If that was the case would the form outside of the layer of spray foam surrounding the hose?
- Does it even seem advisable to have that layer of spray foam around the heat pump hose like that?
This thing is driving me crazy. Any thoughts are most welcome, thank you!