Yellowjackets and wasps can make nests that get huge this time of year. Each layer is made from thousands of individual yellowjackets working together to construct a sturdy home to defend.
When seeing yellowjackets enter a wall void, you could have a huge nest like this one that is 28 inches x 20 x 20 above a ceiling. More likely it won’t be this big. Use care when treating a nest to avoid injuring yourself or others. The best advice is: 1) do not cover the entry hole and 2) do not try to treat from the inside of the structure. Treat the outside entry hole and leave it alone for 24 hours. If you need help, give us a call.