(But she had taken them up to the roof and hidden them under the stalks of flax she had laid out on the roof.) (NIV)
But she had brought them up to the roof and hidden them under the stalks of flax which she had laid in order there. (AMP)
But she had brought them up to the roof of the house, and hid them with the stalks of flax, which she had laid in order upon the roof. (KJV)