I have what turns out to be Chestnut Parquet 5cm wide x 2.2cm deep. They are laid in the grand salon of my home in France. Part of the floor is concrete and this is damaging the parquet, condensation. I have made a temporary repair to a section of the Parquet pending obtaining more Parquet. I have now got some Parquet and will be fitting it on my next visit. The Parquet is simply laid on wooden joists, which are about 40cm apart. Gluing is therefore not an option. Should I predrill the parquet and what nails should I use?