I had my house blown in from the outside, my home is 100 yrs old. Did not have wrinkles but had cracks. Before you do have your house blown in make sure that all your cabinets where they meet the walls are sealed. It looked like it snowed in my kitchen, even the cobwebs were full of insulation. I live in the midwest, it did help not quite sure how much $$ I am saving on heating. Good Luck and pay someone else to do it for you.