If by wasps you mean "yellow jackets" or other social species that live in large nests, then no, you don't have to worry about that. These homes are designed for solitary creatures and won't attract social bees or wasps. There are, however, more species of wasps than there are bees, and many of them live solitary lives as well. Our smallest nesting blocks are known to attract aphid and potter wasps, which are tiny wasps that primarily eat smaller insects and arachnids. They'll never bother you at your BBQ, though.