I'm afaid of fiberglass and stuff falling threw the cracks.
If you plan to use the future conditioned space, you will need to use the insulation that comes in rolls with and R-value of 19if you are not planing in using the space, then you could used loose blown insulation which happen to be less costly than the first method proposethere is none needs to be afraid of the insulation you do need to wear a mask over your nose to prevent you from inhaling itgood Lock with your project, and enjoy a cool summer
aluminum can be successfuly welded (heliarced) - you need to use a pro who can ascertain the right alloy for the welding rods.
aluminum welding would work best.select an alloy that has a high alumcontent (1100 or c399 would be best) this is so it wont oxidizeget a professional to weld itNot the hillbilly down the road who says he can, alum welding is pretty difficult compaired to steel welding.
