Boards for a 14 × 14 ft deck, by board length
A 14 × 14 ft deck is a generous square deck for entertaining. With 5½ in boards and 1/8 in gaps the deck has 30 rows, which is 420 ft of decking before waste. These counts include 10% waste:
| Board length | Boards to buy | Total length bought |
|---|---|---|
| 8 ft boards | 58 | 464 ft |
| 10 ft boards | 47 | 470 ft |
| 12 ft boards | 39 | 468 ft |
| 16 ft boards | 29 | 464 ft |
| 20 ft boards | 24 | 480 ft |
Waste and layout
| Layout | Waste | 12 ft boards | 16 ft boards |
|---|---|---|---|
| Straight, careful installer | 5% | 37 | 28 |
| Straight (typical) | 10% | 39 | 29 |
| Diagonal or picture-frame border | 15% | 41 | 31 |
Joists and screws
Joists run the 14 ft width and are spaced along the 14 ft length.
| Joist spacing | Joists | Screws |
|---|---|---|
| 12 in on center | 15 | 900 |
| 16 in on center | 12 | 720 |
| 24 in on center | 8 | 480 |
That is just the decking surface, for a 196 ft² deck. Posts, beams, footings, ledger, railings and stairs are extra, and a permit is usually required.
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Tools & materials for this project
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Frequently asked questions
How many deck boards for a 14x14 deck?
With 5½ in boards, 1/8 in gaps and 10% waste, you need 39 boards of 12 ft, or 29 boards of 16 ft. That is 30 rows of decking across the 14 ft width.
How many joists does a 14x14 deck need?
At 16 in on center, 12 joists running the 14 ft width. At 12 in it is 15, and at 24 in 8. Joist size and span must follow your local building code.
How many screws for a 14x14 deck?
About 720 screws: two at every joist for each board. Buy a few extra, since they strip and get dropped.
Related sizes and guides
Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.