Materials for a 8×14 deck

18 deck boards (16 ft)

for 112 sq ft: 18 rows of 5½ in boards with a ⅛ in gap, on 12 joists, with 10% extra.

For a 8×14 foot deck, the boards run along the 14 ft side and the joists span the 8 ft side.

Materials for a 8×14 deck

Deck area112 sq ft
Deck boards (5½ in × 16 ft)18
Linear feet of decking252 ft (+10% = 277 ft)
Joists at 16 in on center12 × 8 ft
Joists at 12 in on center15 × 8 ft
Rim joists2 × 14 ft
Deck screwsabout 432

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

Deck boards needed

18 boards

16 ft long, 5½ in wide (5/4 × 6 or 2 × 6), 18 rows across a 8 ft deck.

Deck area112 sq ft
Rows of boards18
Linear feet252 (about $444)
Joists12 at 8 ft
Deck screws432 (2 per board at each joist)

Other deck sizes

Questions

How many deck boards do I need for a 8×14 deck?
18 boards 16 ft long (5½ in wide), laid in 18 rows, including 10% extra.
How many joists for a 8×14 deck?
12 joists 8 ft long at 16 in on center, or 15 at 12 in on center.
How many screws for a 8×14 deck?
About 432 deck screws: two per board at each joist. A 5 lb box holds roughly 350 to 450 screws.
How much does a 8×14 deck cost?
Decking boards alone run about $444 in pressure-treated pine or $1,109 in composite. A finished 112 sq ft deck built by a contractor typically costs $3,360 to $6,720.

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