sweetczz

I live in York PA and I'm interested in using Icynene for crawl space and attic insulation. Crawl space should be R-19 and Attic R-49 to my understanding. I hear Icynene is so good that it does not need to be R-19/R-49. However, the Dept of energy states that a well insulated house has good Conduction, Convection and Radiation. I'm reading closed cell probably works best. I have a colonial home in York PA approximately 30 x 24. I'm willing to spend 6k to insulate - maybe more UNLESS there is better solar on the market for the same price,. Can anyone give me advice on how to get that conduction, convection, and radiation and what type of insulation? I've had at least 6 different people come in and they all say something different. None of them talked about conduction, convection or radiation. One contractor said that my crawlspace floor needed a barrier, seal all cracks etc, put up new R-19 insulation for $6500.00! That's not even the attic. He says just spray in the floor with cellulose to get an R-49 value and don't worry about the walls of the attic (which have improperly installed R- values mixed from R-19 to R-22, approximately $2,500). I'm reading that the attic should have all cracks sealed but Icynene will do all this which makes it a good contender as well as being fire retardant if done properly to code. Any suggestions on the most energy efficient way to insulate my attic and crawl space to code? Alternatively any Solar Energy I could look into? Thanks.