I have my fabric folded on corrigated plastic boards, I buy the 4'x8' sheets from the sign store, they will cost about $14.00 each if you buy several. then i use a box cutter to cut them 8" x 12', I can get 48 pieces out of 1 sheet. After cutting i wrap the fabric i place in clear plastic containers with a fabric softener sheet. I keep mine out of the sun. I don't know about storing in the basement. If you do maybe get a dehumidifier just to stay safe.