When you receive the wood flooring, you should never store them outdoors, directly onto concrete for a long period of time, in a garage or in any damp conditions. The wood flat, packs should never be leant against a wall. It should be left in its packaging until you are ready to lay the floor for a minimum of 5 days to ensure that the wood is acclimatized to the room conditions.
The optimal humidity range for hardwood flooring is between 40 and 45% throughout the year. Temperature should be maintained at about 18 degrees Celsius.
In new constructions, the property should be fully enclosed to outside elements (roof, doors and windows installed etc.). All wet trades (plumbing, plastering, painting etc.) should be dried out. Where a new concrete slab has been laid, the dried moisture content must not exceed 5%.