Mike Holmes likes to use the Blue Spray foam in just about all of his rework projects. If they used that stuff with the right sprayer(sprayee) it would look decent. Just a thought. That yellow crap looks terrible the way it was applied. Looks like the Units could double as Rock Climbing wall.
What's used is a 2-part foam. But if it doesn't have the proper flame propigation characteristics, it can only use for sealing leaks. We did do 1/2 a system once using the 2-part foam on a very specific install. The problem was that the old furnace was in a crawl where the ocean visits every year or three. So we replaced the furnace to the 2nd floor attic but we still had to duct down from the attic to the crawl space distribution. We put in all new ducts as the old ones were rusted out from the salt water. So what to do? New ducts will be junk in a couple of years if we use standard wrap insulation and the insulation will be junk too. So why not spray foam? Give the right amount of R-factor (1.6/inch). seals agains air leaks and when the ocean visits, it hopefully will prevent infiltration of salt water to the ducts. And should the ducts rust out, I guess the foam form is the new duct system!! Not pretty but it was the only solution we had for this unique situation. Comments?
If YOU want change, YOU have to first change.
If you are waiting for the 'other guy' to change first, just remember, you're the 'other guy's' other guy. To continue to expect real change when you keep acting the same way as always, is folly. Won't happen. Real change will only happen when a majority of the people change the way they vote!