Why are my window jambs so narrow?

5 years ago

We just purchased a new house. According to the inspector, the house has andersen 400 series windows. They are double hung. The jambs are less than 1/2" deep.

My current house has casement windows. The jamb depth is like 2". My current house is brick and my new house has siding.

Why are my new windows so shallow? It's annoying in terms of window treatments. Does it have to do with the brick vs siding? Or the double hung vs casements? I feel like other siding houses I have lived in had deeper windows.

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