When purchasing a prefabricated A-frame or Triangle Home, the structural frame material is paramount. You should prioritize Galvanized Light Steel Gauges or Hot-Dipped Galvanized Steel to ensure rust resistance and a lifespan of 50+ years. For the walls, ensure the use of Sandwich Panels (PU, Rockwool, or EPS) with a thickness of at least 75mm to 100mm to provide adequate thermal insulation and soundproofing. Additionally, verify that the floor loading capacity meets international residential standards, typically ≥2.0kN/m².