Why not make the attic a bedroom?

[jason88cubss]

instead of having 3 boys in a room or 3 girls in a room, is there a reason why John never made the attic a bedroom?

[Johnny]

one reason is practical comfort,  attics are poorly insulated and heat up like an oven in summer and become really cold in winter. Another consideration, where to put in windows? Maybe have tiny ones at either end of the attic. skylight windows were not common in the 1930s.