Laminate floor has shifted by 1/2
My father installed a laminate floor in my living room and dining room in July 08. Although he does not do this as a profession he has done it before I had confidence in his skills. He left 1/2 gap the whole way around between the floor and the baseboard (we decided to install the floor after the baseboard was in). To cover the gap we purchased 3/4" quarter round moulding. I Started to install this moulding myself. I measured and cut, but did not nail any pieces in. Every home improvement project I do takes many months so...when I went back to work on the moulding again, I found that the entire floor had shifted. Where I once had 1/2" gap I now have 1 and 1/8 inch gap. On the other side of the room I have only 3/8" gap. If we can manage to shift the floor back is there any way to prevent it from shifting again? Any suggestions and help, of course, will be appreciated.