My home was built in 1955 and has perhaps 3" of insulation with a paper backing of some kind. I have some questions: 1# Is this a fire hazard if left alone? The person who gave me the quote told me this was a fire hazard. The attic is empty though there is some cardboard covering the insulation in spots. 2# He recommended removing the insulation in the attic and replacing with "Open Blow" (R30), installing baffles, etc. Cost $4820 and if we pay $250 for an energy star audit we can save 10% off that cost. Frankly that cost is huge in comparison with the previous estimate ($1200 over the existing insulation). 3# Is there a great deal of sense in Air Sealing crawl spaces and basements (includes sealing rim joist) ? - MClark