best value, best product for attic insulation

[Don Meinke]

Looked at the store yesterday at different insulation products.  No calculator in hand but seemed shake and rake(I call it shake and bake) was double or triple cost of blow in regular stuff.

From there it was hard to see IF roll stuff or blow in would be better.  Also thinking maybe roll type might be better IF repairs or access is required down the road.  Could move the roll type over and moved back.  Just wished they made wider longer rolls.

Has anyone actually analyzed what is cheapest,,,best,,,most efficient? Fliberglass? Cellulose? or that new denim product?

thanks, don