Not with beano!
Supers, particularly wet ones with no brooded cells are far safer than brooded frames.
No need for a roof if they are in your garage, just need to be waxmoth-free and stacked with, say, a fine mesh below and a crownboard above, or similar. They benefit by being held tightly together to avoid any small gaps where moth may otherwise gain entry. Seal any imperfections.
Waxmoth damage to foundation is possible but unlikely. There should not be undrawn foundation in frames, shirley? It will only dry out and warp. Undrawn foundation is always best stored in the original packaging and preferably sealed. It is usually warm brood comb that is most at risk, more so if stored close together as they are in a hive or closer if plastic spacers are removed.
Best thing to do is inspect them for damage now. Waxmoth can be a nuisance all year round if it not a cold winter.
RAB