How Many Deck Boards Do I Need for a 10′ x 10′ Deck

To determine how many deck boards you need for a 10′ x 10′ deck, you’ll need to consider the width of the boards you’re using and the gap you plan to leave between them. Here’s a step-by-step guide to help you calculate:

Determine the Area of the Deck:

A 10′ x 10′ deck is 100 square feet. It’s a good idea to layout your deck area with wood stakes and builders twine first. Many find once they do this they increase the size as grills an furniture take up space pretty fast.

Choose Your Deck Board Width:

Common deck board widths include 4 inches (actually 3.5″ for a nominal 1×4), 6 inches (actually 5.5″ for a nominal 1×6), and so on.

Account for the Gap Between Boards:

A common gap between deck boards is 1/8 inch, but this can vary based on preference and the type of fasteners you’re using. Adjust the width of the board to include this gap. For example, if you’re using 6-inch wide boards with a 1/8 inch gap, the effective width is 6.125 inches.

Calculate the Number of Boards Across the Deck:

Divide the width of the deck by the effective width of a board (including the gap). For example, using 6-inch wide boards (with a 1/8 inch gap) for a 10-foot wide deck: 120 inches 6.125 inches 6.125 inches 120 inches​ = 19.6 boards. You can’t have a fraction of a board, so you’ll need 20 boards across the width.

Calculate the Number of Boards Needed:

Since the boards run the length of the deck, and the deck is 10 feet long, you’ll need 20 boards that are each 10 feet long.So, for a 10×10 deck using 6-inch wide boards with a 1/8 inch gap, you’ll need 20 boards that are each 10 feet in length.

Consider Overages:

It’s always a good idea to purchase a little extra to account for mistakes, cuts, and potential future repairs. A common recommendation is to buy 10% extra. So, if you need 20 boards, consider purchasing 22 boards (20 + 2 extra for overage).

Remember, the actual number of boards you’ll need can vary based on the exact width of the boards you purchase, the gap you choose, and other factors like the design of the deck. Always measure and plan carefully before purchasing materials.

You can choose from our large selection of deck boards online and buy direct and have you decking arrive to your home or job site.

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