I am new on this site and have a problem with a squeeky floor in the back bed room of our 1976 double wide trailer we are renovating. I have tried rescrewing the floor down that didn’t work. I found that the original screws used were not flooring grade so I removed them from a 4×8 sheet of k3 board on the floor and put in 3″ flooring screws and still squeeks. Under the trailer is fiber cover over the floor joist and I don’t want to cut this as this is low crawl space and difficult to manover. does anyone have a go idea that will help me. hope to hear soon thank.