To make a basic Putz house, cut out all the pieces for the main house, the roof and any porches or additions. The house pieces are folded at the ends of the roofs. The chimneys are folded at the edge of the triangles that mark where they sit on the roof. The front door additions are folded as shown above at the edge where the roof meets the sides. If the pieces need an additional fold it will be marked on the printable sheet.
If you want to make clear windows, or add glitter coatings to the houses, it is easiest to do this before you fold and assemble them. You can glue bits of cellophane behind cut out windows to copy the traditional Putz houses, which used mainly red and yellow cellophane, or you can use a thick glue, or specialized glue product like Glue N Glaze to make clear window films over openings.