🌲 Where does the wood for a house come from?

Look at the houses out the window, along the street and up on the hills. Lots of houses have a secret skeleton hiding inside their walls, made of wooden boards. And every one of those boards used to be a tall tree! Pine, fir and spruce trees grow in big forests. Workers cut them down, and trucks carry the logs to a sawmill.

Giant saws slice each log into long, flat boards, like slicing a loaf of bread. But here's the surprise. A fresh tree is full of water, so new boards are heavy and soggy inside. As that water leaves, the wood shrinks and can twist and bend. If builders used wet boards, the walls could go crooked and doors might get stuck.

So the boards get dried first, often in big warm rooms called kilns that work like giant ovens. Otherwise you might live in a wobbly house, like a bouncy castle! Count the houses you pass. Each one holds a little forest!