Materials for a 8×24 deck
30 deck boards (16 ft)
for 192 sq ft: 18 rows of 5½ in boards with a ⅛ in gap, on 19 joists, with 10% extra.
For a 8×24 foot deck, the boards run along the 24 ft side and the joists span the 8 ft side. At 24 ft you will need to join boards over a joist; stagger the joins from row to row.
Materials for a 8×24 deck
| Deck area | 192 sq ft |
|---|---|
| Deck boards (5½ in × 16 ft) | 30 |
| Linear feet of decking | 432 ft (+10% = 475 ft) |
| Joists at 16 in on center | 19 × 8 ft |
| Joists at 12 in on center | 25 × 8 ft |
| Rim joists | 2 × 24 ft |
| Deck screws | about 684 |
Framing sizes (joist depth, beams, posts and footings) depend on spans and local code; check your building department’s deck guide before you build.
Change the numbers
Other deck sizes
- 8×20 deck
- 8×18 deck
- 10×24 deck
- 8×16 deck
- 8×14 deck
- 8×12 deck
- 12×24 deck
- 8×10 deck
- 8×8 deck
- 14×24 deck
- 16×24 deck
- 18×24 deck
Questions
- How many deck boards do I need for a 8×24 deck?
- 30 boards 16 ft long (5½ in wide), laid in 18 rows, including 10% extra.
- How many joists for a 8×24 deck?
- 19 joists 8 ft long at 16 in on center, or 25 at 12 in on center.
- How many screws for a 8×24 deck?
- About 684 deck screws: two per board at each joist. A 5 lb box holds roughly 350 to 450 screws.
- How much does a 8×24 deck cost?
- Decking boards alone run about $760 in pressure-treated pine or $1,901 in composite. A finished 192 sq ft deck built by a contractor typically costs $5,760 to $11,520.