Diagonal 45° · all 20 popular sizes
Diagonal 45° Deck Pattern
Boards run at a 45° angle to the joists — the most popular upgrade from straight. Adds dimension without adding herringbone-tier cost.
1.12× labor vs straight14% waste12″ O.C. (mandatory for composite, recommended for wood)
Best for
Mid-size decks (250-500 sqft), composite installs, designs that want a modern look without going to herringbone or chevron complexity.
Watch-outs
Adds ~14% waste vs straight; 12″ O.C. requires ~20% more joists + hangers. Total cost premium typically 18-24% vs straight.
Pick your diagonal 45° deck size
10×8
80 sqftMid composite: $4,480-$7,168
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10×10
100 sqftMid composite: $5,600-$8,960
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12×10
120 sqftMid composite: $6,720-$10,752
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12×12
144 sqftMid composite: $8,064-$12,902
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14×12
168 sqftMid composite: $9,408-$15,053
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16×12
192 sqftMid composite: $10,752-$17,203
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16×14
224 sqftMid composite: $12,544-$20,070
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20×12
240 sqftMid composite: $13,440-$21,504
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16×16
256 sqftMid composite: $14,336-$22,938
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20×14
280 sqftMid composite: $15,680-$25,088
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24×12
288 sqftMid composite: $16,128-$25,805
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20×16
320 sqftMid composite: $17,920-$28,672
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20×18
360 sqftMid composite: $20,160-$32,256
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24×16
384 sqftMid composite: $21,504-$34,406
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20×20
400 sqftMid composite: $22,400-$35,840
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24×20
480 sqftMid composite: $26,880-$43,008
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24×24
576 sqftMid composite: $32,256-$51,610
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30×20
600 sqftMid composite: $33,600-$53,760
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30×24
720 sqftMid composite: $40,320-$64,512
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30×30
900 sqftMid composite: $50,400-$80,640
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See diagonal 45° rendered in 3D
The Pattern Visualizer animation renders all 5 patterns live — toggle between them, rotate, compare with your spouse or contractor before committing.