1. Introduction
This manual provides detailed instructions for the assembly, operation, and maintenance of your WACASA 13x20x8.3 FT Metal Garage Shed. Designed for durability and versatility, this large metal building offers 260 sq. ft. of space, suitable for use as a protective car garage, a creative workshop, or a central hub for various outdoor storage needs. It features an ultra-reinforced 18-gauge powder-coated steel frame, engineered to withstand challenging weather conditions, including 100 PSF snow loads and 150 MPH winds. The shed also incorporates polycarbonate skylight panels and integrated vents for natural lighting and ventilation, along with smart dual-entry doors for convenient access and enhanced security.

Figure 1: Exterior view of the WACASA 13x20x8.3 FT Metal Garage Shed.
2. Safety Information
Please read and understand all safety warnings and instructions before assembling or using this product. Failure to follow these instructions may result in serious injury or property damage.
- Foundation: For permanent stability, securing this shed to a concrete foundation using the provided anchors is highly advised. For installation on non-paved ground (e.g., soil or gravel), the separate purchase of heavy-duty auger anchors (at least 30-36 inches / 75-90 cm in length) is required to ensure a secure grip that bypasses the frost line and prevents shifting.
- Assembly: Assembly requires multiple individuals. Do not attempt to assemble alone. Wear appropriate safety gear, including gloves and eye protection.
- Weather Conditions: Do not assemble the shed during strong winds, heavy rain, or other adverse weather conditions.
- Tools: Use appropriate tools for assembly as specified in the instructions.
- Children and Pets: Keep children and pets away from the assembly area.
3. Package Contents
Verify that all components listed in the packing list are present before beginning assembly. The package typically includes:
- Galvanized steel frame components (18-gauge ultra-reinforced steel)
- Metal wall and roof panels (23-gauge multi-coated galvanized steel)
- Polycarbonate skylight panels
- Base floor kit components
- Dual-entry doors with anti-theft hardware
- Ventilation grilles
- All necessary fasteners, screws, and anchors

Figure 2: Components of the galvanized steel base floor kit.
4. Setup and Assembly
Follow the steps below carefully. It is recommended to have at least two people for assembly. Refer to the detailed 3D assembly video for visual guidance.
4.1. Site Preparation
- Choose a level and stable site for your shed.
- Clear the area of any debris, rocks, or vegetation.
- Ensure adequate drainage around the shed location.
- Prepare your foundation (concrete slab or suitable ground with auger anchors) as per safety guidelines.
4.2. Assembly Video Guide
Video 1: Detailed 3D Assembly Demo for the WACASA 13x20 Metal Shed. This video provides step-by-step visual instructions for constructing the shed frame, attaching panels, and installing doors and roof components.
4.3. Key Assembly Steps (Refer to video for full details)
- Base Frame Assembly: Assemble the galvanized steel base frame using the provided screws and connectors. Ensure all corners are square and secure.
- Wall Panel Installation: Attach the wall panels to the base frame, ensuring they are correctly aligned and secured with the designated fasteners.
- Truss System Construction: Assemble the double-reinforced internal truss and beam system. This forms the robust backbone of the roof structure.
- Roof Panel Attachment: Install the roof panels, including the polycarbonate skylight panels, ensuring a weather-tight seal.
- Door and Vent Installation: Mount the dual-entry doors and install the ventilation grilles. Ensure doors operate smoothly and securely.
- Final Anchoring: Secure the entire shed structure to your prepared foundation using the appropriate anchors.

Figure 3: Interior view of the shed, demonstrating potential storage configurations.
5. Operating Instructions
Your WACASA Metal Garage Shed is designed for ease of use and security.
- Dual-Entry Doors: The shed features a wide front double door for vehicle and large equipment access, and a separate personal side door for convenient walk-in entry. Both doors are equipped with anti-theft hardware and are fully lockable. Always ensure doors are securely closed and locked when not in use.
- Natural Lighting: Four strategically placed polycarbonate skylight panels allow natural daylight to illuminate the interior, reducing the need for artificial lighting during the day.
- Ventilation: Four integrated vents provide excellent cross-ventilation, helping to prevent dampness and stale air inside the shed. Ensure these vents remain unobstructed for optimal airflow.

Figure 4: The shed's dual-entry system, providing wide access for vehicles and a separate side door.
6. Maintenance
Regular maintenance will ensure the longevity and optimal performance of your WACASA Metal Garage Shed.
- Cleaning: Clean the exterior and interior of the shed periodically with mild soap and water. Avoid abrasive cleaners or harsh chemicals that could damage the powder coating.
- Fasteners: Periodically check all screws, bolts, and anchors to ensure they are tight. Re-tighten as necessary to maintain structural integrity.
- Snow Removal: While rated for heavy snow loads, it is advisable to remove excessive snow accumulation from the roof to prevent undue stress on the structure.
- Ventilation: Keep the ventilation grilles clear of obstructions (e.g., leaves, debris) to ensure proper airflow and prevent moisture buildup.
- Door Mechanisms: Lubricate door hinges and locking mechanisms annually to ensure smooth operation.
7. Troubleshooting
If you encounter any issues with your WACASA Metal Garage Shed, refer to the following common troubleshooting tips:
- Shed feels unstable after assembly: Ensure all fasteners are tightened. Verify that the shed is properly anchored to a solid foundation as per the installation instructions. Uneven ground can also contribute to instability; ensure the site is level.
- Water leakage: Check all roof and wall panel overlaps and seams for proper alignment and secure fastening. Ensure all screws are tight and any sealant (if applicable and provided) is intact. Verify that the base floor kit is correctly installed to prevent moisture from rising from the ground.
- Doors are difficult to open/close: Check for any obstructions in the door tracks or hinges. Ensure the shed structure is square and level, as misalignment can affect door operation. Lubricate hinges and locking mechanisms if necessary.
- Poor ventilation/dampness: Ensure all four integrated vents are clear of debris and not blocked by stored items. Consider adding additional ventilation if the shed is used in extremely humid environments or for activities that generate significant moisture.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | WACASA |
| Model Number | Y8L112-1320-BW-YZ-DZ |
| Material | Alloy Steel (Frame), Metal (Panels) |
| Color | Black-Blue |
| Item Weight | 580 Pounds |
| Floor Area | 260 Square Feet |
| Size (L x W x H) | 13 x 20 x 8.5 FT |
| Snow Load Rating | 100 PSF |
| Wind Resistance Rating | 150 MPH |
| Frame Material Gauge | 18-Gauge Powder-Coated Steel |
| Panel Material Gauge | 23-Gauge Galvanized Steel |
| Roof Type | Water-resistant steel structure with polycarbonate skylights |
| Base System | Galvanized Steel Shed Base System (250lb/sqft support) |
| Ventilation | Integrated vents |
| Assembly Required | Yes |

Figure 5: Dimensions and compatible ground surfaces for the shed.
9. Warranty and Support
WACASA stands behind the quality of its products. For specific warranty details, please refer to the warranty card included with your purchase or contact WACASA customer support directly. If you require assistance with assembly, parts, or have any questions, please reach out to our customer service team. Contact information can be found on the product packaging or the official WACASA website.