1. Cork flooring is made from the Bark that is harvested from the Cork Tree (Quercus Suber), the only tree able to regenerate after the harvest. The bark can be re-harvested every 9-10 years without damaging the tree. Regulated forests within the Mediterranean, mainly in Spain & Portugal, are the producers for the cork industry.
2. Whether you use cork as your subfloor or main floor covering, if properly sealed/finished, the flooring will not rot, mold or mildew, for in its natural state, it is impermeable to liquid and gases. Water-based seal/finishing such as urethane are recommended. Because it does not release toxic gases on combustion, it is fire resistant.
3. Cork is a wonderful insulator. It is resistant to temperatures, so go ahead, take off your shoes and walk barefoot. You won’t find the same cold experience as with most tile flooring.