Iron and oak don't mix.

Oak is about the worst but a lot of timbers will react badly with iron.

You might find stainless steel screws that work but if you want to take
the boards up undamaged one day, the tried and tested method is brass
screws.

You can use filler with them but pellets are used for a reason. If you
are going to be fussy and want them well hid, use off cuts from the
piece you are laying to make the plugs out of. It is worth the extra for
the effect. Try to choose matching grain and try to put them in to suit.

Alternatively, use a contrasting timber for the pellets and stain them
to draw attention to them.

The floor will only look new until it isn't.


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