A floor with a border usually has a sub-floor. Do you have a sub-floor under the floor with a border? If there is a sub-floor you will have no problem laying another floor over the top of the existing, strength-wise. You will need to flatten the existing floor with something so that you will be within tolerance of the instructions for laying your flooring if you want to have a warranty Use a straight-edge to see how much you need to raise the middle of the room, which is called the field. If you do not have a sub-floor, you can either add blocking between the joists or add another u underpayment on top of your finish floor that you have, now.
|