Good

Bad - Sloppy with gaps

Bad - Missing back

Bad - Too tight to pipes

Bad - Gap rough surface

Good

Bad - Not enough barrel extension to warm space

Bad - Hole through spray foam

Good - Wrapped with poly

Bad - Overspray - Encased

Bad - Hole through spray foam

Good - Isolated using batt

Good - Wires tight and off pipe

Bad - Need to be isolated