We realized that we had a wasp nest in or near the house when we noticed several flying around and dead bodies scattered on windowsills. After a few days we discovered the entrance to their nest when we saw them entering and leaving from under the shingles just outside a second-floor window. In other words, a nest was clearly deep inside one of the exterior walls, and from the number of wasps, it was likely fairly large which was pretty worrisome. I called ASM Pest Control in the late afternoon, fully expecting someone to come in a few days or weeks. I was surprised when they said theyd be arriving in a couple of hours. When they looked at the problem, they carefully explained the steps they would take, the treatments they would be applying and what we were to expect over the next week. I was impressed at how thoroughly they described the problem to me, from best to worst case scenarios. They gave me a can of spray to apply daily for the next week as a precautionary measure. Over the next few days, we found more and more dead wasps until, a week later, the wasps have disappeared. I recommend ASM Pest Control very strongly for their prompt response and efficient handling of our wasp problem.