... Q235, components make bottom and surface painted process.10roof beamTriangle roof frame is welded by square steel pipe, components surface is ... 100,150mm thickness color steel sandwich panel, white color13roof board(Ceiling board)50,75,100,150mm thickness color steel sandwich panel ... sliding window,conch model 1740*925mm17Optionsceilingroof board is also ceiling board, so this house don't need to make ...