You have bees that look like yellow jackets that are making nests inside of your wood window frames WHAT are they They made their own hole to get in to make a nest?

I'm not sure what you call them... (Wood bees?) As long as there is wood for them to get into, they will keep coming back. You can use some type of wasp spray to get rid of the ones you can see, then when you notice one going inside one of his holes, slowly go to the hole (they don't usually attack when you are calm and not afraid) with a roofing nail and nail that sucker in his own hole. He will buzz madly for about 3 days before he dies in there! It's almost funny, but he will die since he can't turn around to get himself back out! I finally replaced my wood awning over my back porch with a metal one, so I'm sorry if I can't help any more than this. We had several good laughs until the kids came over to play and then had to do something different. An exterminator could probably answer your question without charging you!