durable and low cost prefab house 1 ... , reception center and shops and so on2.Advantages: 1) Easy to assemble and disassemble with simple and common tools. ... Light weight, convenient for shipment and transportation. 7) Beautiful appearance, virious colors and shapes for outer and inner roof panel and ... height, eave height, roof pitch, etc. 2) Doors and windows: Dimension, quantity, position to put them. 3 ...