Hi, I've removed the OSB sheet flooring from my bedroom and I'm currently laying pine 7" tongue and groove floorboards, I've used Spax flooring screws to hold them down tight, but would probably like to fill over the screw heads. Is it better to do this before staining the boards or use a wood putty after? Also can anyone recommend a hard wearing topcoat varnish? Thanks
As the OP is using Spax screws, he could have screwed the floor boards through the tongue anyway (in the way they've been designed to be used)
I thought about using the tongue tite screws in the hidden screw method, but as i haven't got a sub floor im screwing straight onto the joists, I thought going through the boards would give me a stronger hold.
I used screwfix item number 88716 they have the twin thread to hold the board and pull it tight to the joist.
Rather than filling the screw holes you may want to consider using plugs made out of the off cuts. You may have to put the screws in a little deeper to accomodate the plug. Possibly a little more effort than filling and then sanding but you won't get so much of an issue with the stain highlighting the filler - even if you do the wood glue and sawdust trick it will be hard to match
Sorry i should have said at the start the OSB was previously water dameaged and cracked in several different areas
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