[SPACE-SAVING WALL-MOUNTED CAR PORT] Optimized for side-of-house installation, this 12x20 ft(142" W x 234" D) lean-to features a 107-inch high-side clearance, designed to fit perfectly under standard residential eaves. Transform your unused driveway space into a professional-grade car harbor for full-size SUVs, pickups, or equipment without the need for a massive footprint. [VERTICAL ROOF & SNOW ASSIST] Unlike budget lean-tos with horizontal ridges that trap snow and water, our Vertical Roof design provides an unobstructed path for runoff. Even at a practical 11.5° slope, the vertical panels work with gravity to shed rain and moderate snow more efficiently, preventing heavy accumulation and the "ice damming" common in flat-roof models. [MODULAR GARAGE EXTENSION] Engineered for ultimate versatility, this lean-to unit can be seamlessly paired with our 20x20 ft Metal Carport. Use it as a modular extension to create a comprehensive shelter cluster—perfect for housing an RV in the main 20x20 bay while providing this dedicated 12x20 side bay for your daily driver. [HEAVY-DUTY 19-Ga. SKELETON] Built for professional-grade stability, the frame is constructed from 2x2-inch 19-gauge galvanized square steel tubes with 5 rows of 1.6x2-inch purlins. This rugged foundation offers a high strength-to-weight ratio and long-lasting rust resistance, maintaining structural integrity through years of seasonal weather. [SHIPPING & SUPPORT] Your 12x20 carport arrives in 6 cartons (may arrive separately). We provide dedicated support for shipping damages, missing parts, and assembly guidance. To ensure the fastest assistance, please take and keep photos of the outer boxes upon delivery.