Covered the house with beams and boards of cedar - The Eastern custom is very different from ours: we ceil with plaster, and make our floors of wood; they make their floors of plaster or painted tiles, and make their ceilings of wood. But it may not be improper to observe that, in ancient times, our buildings were somewhat similar. Westminster Hall is a proof of this.
He built the house, and finished it - i. e., the external shell of the house. The internal fittings were added afterward. See 1 Kings 6:15-22.
Covered the house - Roofed it with a wooden roof, sloped like our roofs.