The production of charcoal took place in charcoal kilns where one could control the air supply. There are several types of charcoal kilns. A common kilnwas made up of coarse and slender wood placed vertically, the coarse close to the center, the slender further out and branches on the top. This was all covered in peat, except for a small opening close to the ground, for air supply. The kiln was lit trough a small opening on the top. This opening was closed when the burning had started properly. The kiln was only supposed to simmer. If the kiln caught fire or extinguished, the kiln tender had to regulate the air supply. It was a great loss if a kiln burnt down. About 4m3 of timber was needed to make 12 barrels of charcoal. Kilns burnt in the summer typically gave more charcoal than kilns burnt in the winter.
At Blokkodden there are registered tens of sites where charcoal kilns have been standing. They are all circular and about 11 meters in diameter, which was common for the kilns connected to the Røros Copper Plant. It is assumed that the charcoal kilns in this area were burnt around the mid-1700s. The remains of two charcoal kilns can be found close to the kiln tender cabin.
It took from a couple of days to two-three weeks to burn a kiln, depending on the size. The kiln had to be tended day and night, and the tenders slept in shifts.They lived in kiln tender cabins while they worked. The cabins were very simple and were not cared for. They were usually only used once. The remains of kiln tender cabins have not been found at Blokkodden, but they have been found many other places in Engerdal. Four poles are tied together in the top. The poles support several rods that are covered in bark and peat. An aisle is dug in the middle of the cabin, with benches for sleeping on each side. There is also a hearth that was moved here from Gammelkølhøgstan close to Lillebo. The cabin had to be placed in proximity to the charcoal kiln for the tenders to be able to keep an eye on the kiln from the door.