Posted: 18/05/2014 at 22:22
When I had a nest about the size of a grapefruit in my summerhouse, I stood and observed: wasps are fascinating creatures, and they would fly back, walk around the edge of the nest, disappear inside, and then re-appear to add to the "papery" structure. Having established that there were about a dozen wasps. I got my vacuum cleaner, and as each one returned to the nest, I vacuumed it up, and waited for the next one. (You will gather that this was not a speedy exercise!!!)
After a while, when I thought that most, if not all, of the wasps had met their demise, I vacuumed the whole nest, to find two nursery wasps inside, and cells of larvae ready to pupate. These were easy to dispose of.
Job done. Each year I keep a close eye on the summer house, and at the first sign of nest building, I destroy it.
Hope this helps - a bit of time and care sorted the potential problem without chemicals or expensive pest-controllers.