Filling knot holes in floor
Hi,
i'm getting my floors polished in the next few weeks and have noticed a few knot holes that go all the way through. They are about 10-15mm wide. What is the process to fill these in. Do l have to get under the floor and glue an old bit of wood to act as a backing plate, then fill the hole with wood putty. Thats fine but the floor is pretty shallow in this part of the house and it's not an easy task to get under there. Is there another way? I'd imagine if l just filled the hole, the putty would fall through when being sanded or from being walked on.
Thanks.
Brent:)