I have a bathroom wall and floor against an outside porch. While replacing the floor, I had the misfortune of pulling up a piece which revealed an opening to the space above my back porch. I can see the outdoors thru this space. Yup, real old house. So, can I use blow in insulation to do this job? And, is it possible to use my 16 gal wet vac to blow the insulation in with? I figure I could take the filter off and put the hose on blower. Perhaps I'm way off base with this

Thanks for your kindness

Keith