I am not talking about laminate planks, but actual subfloor sections. My entire room consists of tongue-and-groove boards. I was under the impression that the point of this was so you didn't have to fasten them to joists with nails or screws, but all of mine are nailed in. Pulling up the nails is not a problem, but being able to lift up a section of floor without damaging the tongue (which I have done prior to figuring this out the hard way).
Are the tongues necessary? Can I just take my circular saw right between the boards, cut them way, and then screw them back down afterward?
I am doing remodeling and think I have a squeaky joist. I want to tend to it before putting an underlayment over it. If someone can tell me how to secure a potentially squeaky joist through the top of the subfloor and not from below then I will change the title of this question and mark you as the answer.