We have a 20 ye old home with white parquet floors. The house is located over a crawl space in a warm climate. I believe the floor consists of interlocking squares. Each square is made up of four smaller interlocking squares. Recently in our bedroom floor stated to have small raised areas of flooring. When you step on it flattens out then comes back up. As of today we have long areas or seams of these raised up tiles, which flatten nicely if pressured is applied but when pressure is removed it pops back up. It is getting worse (larger area) each day.
Any idea what might be causing this or what to do about?