UPM Kalso mill produces WISA spruce veneer for parquet industry. It's a pure wood product, no chemicals are added. The mill is located in Finland and employs about 120 people. WISA Parquet Veneer is a high quality technical component that plays an important role in the quality of the parquet. Thin but strong veneer balances the structure of a multi-layered parquet and keeps it straight through its whole lifespan. Properly installed and used in the right conditions, wood products can last over 100 years.