
Prefabricated House Versatile Double Wing Extension Room for Optimal Functionality Home Use. Fast Installation: Complete assembly within 2 hours per set, saving significant labor time. Long Service Life: Designed for a durable lifespan of 30 to 40 years. Earthquake & Wind Resistance: Withstands 9-grade seismic activity and 8-level winds. Customizable Colors: Available in white, blue, green, brown, or fully customized colors. Hot Galvanized Structure: Features 3mm hot-dip galvanized steel structure for superior anti-rust protection. Fireproof Material: Sandwich panels achieve Fire Rating A grade for enhanced safety. Flexible Dimensions: Standard sizes 10ft to 40ft with special 2.9M height and custom options. Comprehensive Support: Includes online technical support, free installation drawings, and video guides.