How To Install Composite Decking

Installation Suggestions

Before starting construction think carefully of the location, design, and purpose of the deck you wish to build. By making a design and estimating the materials required, you can save time and money, and the job will go much faster. You should consult your local building code authorities before beginning. Basic construction skills are required. You may wish to consult a contractor. There are also reference books or websites for ideas. A well built deck will be a valuable asset to your home.

Tools Required

  • levels
  • hammer and drill
  • saws
  • measuring tapes
  • chalk line
  • galvanized or stainless steel nails or screws. Note: If you are using an ACQ treated sub-structure, this is very important because the chemicals can corrode other fasteners. Stainless steel fasteners should never be used where they may come in contact with galvanized fasteners or brackets.


1. The deck can be spanned to a maximum of 24” span; however, we recommend a 16” span on the center for perpendicular application of the boards. If a diagonal design is done, then a maximum of 12” should be used on center.

2. If you are using regular nails or screws, the deck boards can be used as you would with regular lumber. Be sure to put the fasteners through the thick parts of the board to get best holding power.

3. If you are going to use the hidden deck clip, the benefit will be a deck surface free of nail or screw heads.

    • You will need a chalk line as the clips should be attached to the joists in perfectly parallel lines. They should be laid out 5 ¾” to 5 7/8” (147mm-149mm) apart to give a 3/16” to 1/4” (5mm-6mm) gap between boards.
    • This will allow water and dirt to be cleaned out from between the boards and any expansion that may occur will not bind boards together.
    • The clip has 3 holes. Use the center hole to line up the clips with the chalk lines, and attach with two nails or screws. Once the clips have been laid out, the deck board will snap over the clips and be held tightly in place.
    • Start with the outside board or edge of the deck, as the last board against the house may need to be ripped for final placement.
    • The number of clips used will depend on the size of deck and the joist spacing. Every board should have a clip at every joist. Therefore calculate on the basis of each board needing the following number of clips.
12” OC 16” OC 24” OC
12’ board 13 10 7
16’ board 17 13 9

4. Length wise: if you are laying out boards end to end, the expansion and contraction of the length dimensions must be considered. We recommend a length to length gap of 3/16” –1/4” (5mm-6mm) for the boards. If the temperature from the time of installation to the maximum expected temperature is over 40°F, set the gap at 1/4” (6mm).

5. Slope of deck: Even with spacing of the boards, the deck should be sloped away from the house to avoid any water buildup against the house wall. A slope of 1” in 10’ would be sufficient.

Features, Benefits and Characteristics

1. Yakima composite decking is a manufactured product engineered for accuracy of size and consistency of product quality.

2. As a wood-plastic composite, there is long-term protection against decay and termites without the need for chemical treatment

3. Like wood it can be sawn, nailed, and screwed without special tools.

4. During the manufacturing process, UV protection is added for fade resistance throughout the product, and rice flour is added for color consistency.

5. If desired, our hidden clip system will hide screws and nails from sight for a clean looking deck.

6. Yakima decking is environment-friendly, using recycled and waste materials.

7. Its heavy size of 1 3/8” x 5 9/16” (35x142mm) will stand the test of time.

8. Quick North American delivery from inventories on the east and west coasts.

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