Answer:
The houses were wattle and daub. This means they were sticks woven together to make a wall and then covered with a coating of mud and straw. The roof was thatch. There usually was one door and no windows ( in some places windows were taxed). The floor was dirt and there was a fireplace. It was one room that everyone lived in. It was cold and wet in the winter, hot in summer. The lighting came from the fireplace and from tallow candles so it smelled of wood smoke and tallow.
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Peasant cottages had no fireplace. They were not invented until the 11th or 12th century and were only built for rich people. The middle of that dirt floor was a nice place for a fire, and the smoke went out a hole in the roof or under the roof peaks.