Things You'll Need:
- Concrete mix
- Lagbolts
- Joist hangers
- Treated lumber for posts, joists, stair frame
- Stair stringers and treads
- Drill
- 1 5/8-inch screws
- Chalk line
- Circular saw
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Step 1
Choose a deck plan with clear, concise drawings, a complete materials list and understandable instructions. Trex offers designs at its website. Its Deck Designer also provides custom diagrams and material lists.
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Step 2
Set the posts in position--one every 4 to 8 feet--and attach outside framing with lagbolts at the height specified in your plan. If using post holes, add 1/2 bag of concrete per post.
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Step 3
Attach joists, using joist hangers and spacing joists every 12 or 16 inches for adequate support.
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Step 4
Build stairs before laying decking so you don't need to climb a ladder to reach the deck. Frame the stairs with treated lumber. Precut stringers and treads are available in a variety of lengths at lumber yards. Be sure stair rails are well attached, and use framing posts set in concrete wherever possible for added stability.
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Step 1
Start at a corner of the deck and lay four or five runs of decking to create a work platform. Move onto the deck as you go. Use two screws per joist. Pre-drill countersunk pilot holes, and use your drill clutch for correct screw depth.
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Step 2
Maintain a 1/4-inch gap between rows and board ends to allow for drainage and frame shrinkage. Stagger board ends for strength. The ends must overlap joists by a minimum of 1 inch for proper attachment.
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Step 3
Lay full decking pieces whenever possible and let the excess hang over the edge of the deck. Use a chalk line to mark the edge straight across, and cut the overhang with a circular saw.
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Step 4
Install railings on all edges where the deck height is more than 10 inches, and on all sides of pool decks. Use Trex trim to cover joints and gaps.
