Our condo was built in 1989, and I moved in in 2005 with all new carpets. A few months ago (15 years later!), we had new wall-to-wall carpet installed. Now there's creaks and squeaks everywhere in the sub floor where there used to be only minimal or none. Even in the kitchen where we didn't have carpet in the past. Seems so strange. I think the carpet looks correctly installed, and we have good quality padding and carpet. Did removing the tension from the previous carpet cause the change? Is the solution to just use one of those tools that screws the sub floor to the joist through the carpet?