... steel houseExternal lenghtMax.20000mmInternal lenghtMax.20000mmHeight3000mmAreaCustom made layoutBedroompariorDinning roomKitchenToiletstudyporchYesYesYesYesYesYesRoofDecorative layer :asphalt shingles, color steel glazed tile, metal color stone ,resin tileWaterproof ... . The wall system consists of the products manufactured by NICHIHA Japan. As for the insulation, you can choose various materials. ...