Thermal insulation is like a warm fuzzy blanket that keeps you cozy when it's cold outside. Just like how your blanket traps your body heat against your skin, thermal insulation traps heat inside a house or building.
Let's say you have a cup of warm cocoa and you want to keep it warm for a long time. You could use a cup made of a special material that helps to keep your drink warm. That special material is thermal insulation!
Now imagine your home is like that cup of cocoa. Your windows, walls, doors, and attic are all different parts of the cup that need to be insulated to keep heat inside.
Thermal insulation is made of materials that don't let heat move through them easily. Because of this, they keep the heat inside your house in the winter and keep it outside in the summer. This helps keep your home at a comfortable temperature all year round, while also saving energy and money on heating and cooling bills.
So just like how your warm fuzzy blanket keeps you cozy, thermal insulation keeps your house warm and toasty in the winter!