How do you prepare the ground for wood composite decking?

Preparing the ground for decking involves careful planning to ensure the structure is stable, level, and well-drained. Here are the key steps:

1. Choose the Location and Measure

 • Decide where you want the wpc decking and measure the area. Mark the corners with stakes and run string between them to outline the space. Ensure there’s enough clearance and consider any local building regulations or restrictions.

2. Clear the Area

 • Remove any grass, plants, rocks, and debris. If necessary, use a shovel to dig down about 2-3 inches to create a clear, flat surface. This will prevent weeds from growing through the decking.

3. Level the Ground

 • Use a spirit level to check for evenness across the site. Level the area as best as possible, filling any low spots and compacting loose soil. A compact, stable surface will help prevent shifting or sinking over time.

4. Lay a Weed Barrier

 • Lay down a landscape fabric or weed barrier over the cleared ground. This will help prevent weed growth from coming up through the decking boards, making maintenance easier.

5. Add a Layer of Gravel (Optional but Recommended)

 • Spread a layer of gravel, around 1-2 inches deep, across the area. Gravel improves drainage, reducing the risk of water pooling under the deck, which can lead to rot and structural issues.

6. Install Concrete Piers or Deck Blocks

 • Place concrete piers or deck blocks on top of the gravel at the marked points for your deck’s frame. These will support the weight of the deck. Space them out according to the dimensions of your decking plan, typically around 4-6 feet apart.

7. Ensure Piers or Blocks Are Level

 • Check that each pier or block is level with the others. You can use a long, straight piece of wood and a spirit level to verify alignment across multiple blocks. This will help create a flat surface for your deck frame.

8. Install Joist Hangers or Ledger Boards (If Needed)

 • For ground-level decks, you may not need ledger boards or joist hangers. However, if attaching the deck to a structure, these will ensure the deck frame is securely attached.

9. Lay Out the Frame

 • With your deck supports in place, you can start building the deck frame. Use pressure-treated lumber for longevity and follow your decking plan’s design for spacing and layout.

10. Add Finishing Gravel and Check for Level

 • Before installing the decking boards, spread additional gravel around the base for final leveling and additional drainage if needed.

Additional Tips

 • Drainage: Ensure the site slopes slightly away from any structures to aid water runoff.
 • Height Check: Confirm the final deck height meets any required building codes, especially if attaching to a building.

By following these steps, you’ll have a well-prepared, stable, and level base that will support your decking structure for years.