Selecting the right plywood for your shed floor is crucial for long-term durability and load-bearing capacity. Here’s our comprehensive guide to choosing the best plywood for shed flooring.
Best Plywood Options for Shed Floors
Exterior Grade Plywood
- Industry standard for shed floors
- Thickness: 3/4″ (18mm)
- Excellent moisture resistance
- Strong load-bearing capacity
- Waterproof glue bond
- Our most recommended option
Check out our Exterior Plywood
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CDX Plywood
- Budget-friendly option
- 3/4″ (18mm) minimum
- Good structural strength
- Requires proper sealing
- Must be well-ventilated
- Suitable for elevated sheds
Check out our CDX Plywood
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Treated Plywood
- Pressure-treated for ground contact
- 3/4″ (18mm) thickness
- Superior moisture resistance
- Insect resistant
- Ideal for damp locations
- Best for unventilated spaces
Thickness Requirements
Standard Recommendations:
- Minimum: 5/8″ (16mm)
- Recommended: 3/4″ (18mm)
- Heavy Duty: 1-1/8″ (28mm)
Joist Spacing Guidelines:
- 16″ on center: 3/4″ (18mm)
- 24″ on center: 1-1/8″ (28mm)
- For heavy equipment: 1-1/8″ (28mm)
How To Choose Plywood Thickness
Installation Guidelines
- Preparation
- Ensure joists are level
- Verify 16″ on center spacing
- Check for proper ventilation
- Install vapor barrier
- Installation Steps
- Lay sheets perpendicular to joists
- Leave 1/8″ gap between sheets
- Use 8d ring-shank nails or deck screws
- Nail/screw every 6″ on edges
- Nail/screw every 12″ in field
- Surface Protection
- Seal all edges before installation
- Apply floor paint or sealer
- Consider vinyl or rubber mats
- Add threshold at door
Load Capacity Considerations
Light Duty Storage
- Garden tools
- Lawn equipment
- Basic supplies
- 3/4″ (18mm) sufficient
Medium Duty Storage
- Power equipment
- Workbench
- ATV/motorcycle
- 3/4″ (18mm) recommended
Heavy Duty Storage
- Tractors
- Heavy machinery
- Workshop equipment
- 1-1/8″ (28mm) required
Our Recommendations
Basic Storage Shed:
- 3/4″ (18mm) Exterior Grade
- 16″ joist spacing
- Standard sealer
- Basic vapor barrier
Workshop Shed:
- 3/4″ (18mm) Treated Plywood
- 16″ joist spacing
- Heavy-duty sealer
- Premium vapor barrier
Heavy Equipment Shed:
- 1-1/8″ (28mm) Exterior Grade
- 12″ joist spacing
- Industrial floor coating
- Enhanced support system
Additional Tips
- Moisture Control:
- Install vapor barrier
- Ensure proper ventilation
- Maintain ground clearance
- Use adequate drainage
- Support System:
- Level foundation
- Proper joist sizing
- Adequate cross-bracing
- Solid beam support
- Preventive Maintenance:
- Annual inspection
- Reseal as needed
- Check ventilation
- Monitor for moisture
Installation Supplies Needed
Fasteners:
- 8d ring-shank nails or
- 2-1/2″ deck screws
- Galvanized or coated
- Quantity: 2 lbs per 100 sq ft
Additional Materials:
- 6-mil vapor barrier
- Floor sealer/paint
- Construction adhesive
- Joint sealer
What Plywood to Use for Shed Roof?
What Plywood to Use for Shed Walls?
Visit our store to view our selection of floor-grade plywood and discuss your specific project requirements with our experienced staff.
