Exterior Compressor Line Plumes

[Donald Stauffer]

The compressor lines are entering the home and growing something I'm not familiar with. Can't figure what these are and why? Also, the insulation on each of these is cracking.

[Jerry Peck]

It looks like - on my phone - to be expanding foam used to seal things up.

[Gunnar Alquist]

I agree with Jerry. Looks like foam.