I have taken up my circa 1904 house lounge T&G suspended floor, because it was really rough and damaged, and I am putting in 100mm of Urethane insulation between joists and then a new T&G floor, perhaps Oak if I can afford, back onto original joists which I have treated for wood worm and dry rot. My question is does anyone have experience of "Hidden Nailing" floor boards. I have used this technique on T&G on wall cladding, but wonder if I will get sufficient HOLD with the nails, to stop creaks and movement etc., bearing in mind that normally floor boards are nailed with two nails per joist into full thickness. With hidden nailing there would be only one nail per joist into a reduced thickness wood. My local wood yard says it will give me extended grooves to help with hidden nailing, but can't advise me on its suitability for the job or its strength. If I put down Oak at £ 40 per Metre, I don't want to have try to take it up without damage, to make adjustments. Any carpentery experts out there please help!
Dave