How to Build a Deck Using Trex Decking Material
What kind of decking lasts 25 years, never has splinters, resists rot, keeps its original finish and is workable with ordinary tools? The answer is composite decking, and Trex is the brand that started it all. Heavier and more flexible than real wood products, Trex cuts, drills and screws with ease. Unlike wood, Trex is consistent in dimension and density, making installation a simple matter of screwing it in place. Does this Spark an idea?
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
Instructions
-
Preparation and Framing
-
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.
-
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.
-
-
3
Attach joists, using joist hangers and spacing joists every 12 or 16 inches for adequate support.
-
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.
Add Decking and Rails
-
5
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.
-
6
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.
-
7
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.
-
8
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.
-
1
Tips & Warnings
Trex is heavier than wood, so have extra help when moving the decking boards. Use Hideaway hidden fasteners from Trex to avoid screw holes.
Avoid sanding; it causes discoloration and may void warranty
