Does storing tyres in a damp place damage them?

Question from visitor, 18/12/2009 :Does storing tyres in a damp place damage them?
Answer by rezulteo, 18/12/2009 :

Yes, tyres should be stored in a dry, well ventilated area and kept out of the light. Stand them up if they are not mounted on the rims and lay them flat if they are on rims.