Wasps seem to hate warm soapy water. I attached a sprayer to my hose with simple dish soap in it. I applied some several times during the day and have successfully deterred a large nest that was visible and inside my covered porch structure.
Wasps are known to be territorial and will stay away from your dwelling, if they think there is already a nest nearby. This is a page about how to make a duct tape wasp nest decoy.
This page contains the following solutions.
This is a page about homemade wasp traps. Buying wasp traps and the attractant at the store can be quite expensive. Making your own traps is easily done with items you may have around the house.
