Like Walrus said - it's expensive, but it'll stop the air transfer.
I've only seen the hi-ex foam on tv being applied over NM
Coming from conduit country, I kept thinking "that'll suck to change"
No idea if any cable manufacturere has tested their outer jacket in the foam solvent; in addition, the foam heats as it sets... not sure what the temp is, but wonder it if could affect the insulation on the NM.
In addition, wouldn;t the complete encapsulation of the NM affect it's heat dissapation characteristics? The '05 Code addresses NM that's bundled or bunched to go through holes in framing... wonder if the NEC will address this in '08?
[This message has been edited by DougW (edited 06-25-2005).]