Quote:
Originally Posted by wendortb
So what happens if you use a rental machine to spray in cellulose in the walls and try to dense pack? Is it just loose fill and settles and creates voids?
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Yep. This is why the blowers have gotten so much more powerful. It used to be done with a cheap blower and the "two hole method" and now all of those walls have spots with no insulation. At first it's really nice though as loose cellulose has better R value than dense pack. Not by much but a little. Actually This might be canceled out by the fact that loose fill doesn't have the same air sealing properties as dense pack. These days the two hole method is only used if there is concern about the inside wall blowing up under the pressure. Even with a pretty nice blower (Force 2) you need to reduce the hose size quite a bit to get the needed pressure. There's no way to get 3.5 Lbs. with the giant hose used for a loose blow.
Apparently Robert Riversong uses a rental machine so it's theoretically possible. You need to get a pressure tester for it which can be picked up at, well, I'd get it at National Fiber because they are right near by. You also need a good hose (read Tiger Flex) for the last length or else you will get clogs and all kinds of other problems. Regular vinyl hose keeps it's shape so it will be all curled up and not interested in going where you want it leading to voids, frustration and settling. You also need to reduce the hose size gradually or you again will get clogs.