I recently bought an used house (20 years old) and after removing the carpet in the living room, I found along one particular seam of the subfloor (I think it’s plywood) the edges are cupping. In other words, this seam is raised and it runs all the way from one wall to the other. There is a...

Hello all, I hope it is ok to ask this question even though it is not technically DIY as it is related to a floor I paid someone to install. We had Pergo installed in July 2010 in our ground floor (no basement) condo. The installers ripped up the carpet and found that the concrete underneath...