On Tuesday, February 18, 2014 11:20:57 AM UTC-5, wrote:
On Tuesday, February 18, 2014 8:11:22 AM UTC-6, wrote:

I am wanting to convert my flex duct in my crawl space to metal duct. However, the duct at Lowes seems flimsy. I also am having in the summer condensation on my ductwork. I want to eliminate this.







Can I use the expanding spray can foam sealant or rubberized undercoating like you use on a car to spray the duct before installation, then wrap it with the duct wrap insulation to maximize the insulation value of the duct and to give the duct rigidity?







One last thing, can a person buy the professional spray insulation material and spray it themselves at home in the attic etc? I have a large air compressor and several spray guns? I would like to add some insulation myself, especially in the attic.







I really appreciate it!



Part of what I want to do is make it where the insulation is "animal proof". I have cats that get under there for warmth and sometimes they claw at the insulation.



What I really wish I could find is something to slip over the ductwork like what they make for insulating pipes. (The black foam stuff.)

They nake aluminum foil faced insulation for that purpose. The aluminum
foil faces out.

http://cfnewsads.thomasnet.com/image.../019/19284.jpg

I would think that would probably be left alone by the cats. At least as
much or more so than the black foam stuff.

Or how about obtaining a small shelter of some kind for the cats,
maybe you could even find something on craigslist that someone wants
to get rid of? Then keept them out of the crawlspace.