Okay little buddy, a Berg house is a type of building where people can live or work. It's usually made out of wood, and it's designed to be really sturdy and withstand the cold weather in places like Norway, Sweden, and Finland.
Berg houses have steep roofs with a lot of slope, which helps the snow slide off easier. The walls are thick and insulated, which means they keep the inside warm even when it's freezing outside.
Some Berg houses have a little room called a sauna, which is a really hot room where people can go to relax and sweat. They can also take a dip in a cold lake or snow afterwards to cool down.
Overall, Berg houses are like cozy little homes that are perfect for people who live in cold, snowy places.