Trex deck material cost typically runs $8-$16 per square foot for decking, fasteners, fascia, and ordinary installation waste, excluding the substructure and labor. Board collection, deck size, color, trim, and local retail pricing drive the final bill; boards alone commonly cost $5-$12 per square foot.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Deck boards only | $5/sq ft | $8/sq ft | $12/sq ft | Material price varies by Trex collection and retailer |
| Boards, clips, and waste | $6/sq ft | $10/sq ft | $14/sq ft | Assumes a straightforward deck surface |
| Decking, fasteners, fascia | $8/sq ft | $12/sq ft | $16/sq ft | Excludes framing, railing, delivery, and labor |
| 300-sq-ft material package | $2,400 | $3,600 | $4,800 | Uses the package range above |
What Trex decking materials cost for a typical deck
For a 300-square-foot surface, a basic material order is often about $2,400-$4,800 when it includes boards, fastening hardware, fascia, and a modest allowance for cuts. A middle-of-the-range budget is roughly $3,600. These estimates cover the walking surface, not the joists, beams, posts, stairs, or railing.
Board-only pricing is useful when comparing store quotes, but it is not the complete materials budget. Hidden clips, starter clips, screws, edge trim, and extra boards for waste add to the purchase. Assumptions: standard rectangular layout, common Trex colors, typical U.S. retail pricing, and 5%-10% extra decking for cuts. For early budgeting, use $8-$16 per square foot for a trimmed Trex surface package.
How boards, clips, and fascia shape the material quote
The quote should identify whether prices cover only decking boards or the related components needed to finish the perimeter. Hidden fasteners are generally used for grooved boards, while square-edge boards may need face screws or a compatible starter system. Product compatibility matters, so the fastening method should match the selected board profile.
| Material component | Typical price | What changes the amount | Budget note |
|---|---|---|---|
| Trex deck boards | $5-$12/sq ft | Collection, color, profile, retailer | Largest surface-material expense |
| Clips and screws | $1-$3/sq ft | Board profile and fastening layout | Check whether a clip kit includes screws |
| Fascia and edge trim | $3-$8/linear ft | Perimeter length and color matching | More edges and stair faces raise quantity |
| Waste allowance | 5%-10% of board order | Angles, borders, and board lengths | Complex layouts can need 10%-15% |
| Delivery | $75-$250 per order | Distance, order size, unloading needs | May be waived or bundled by a retailer |
A low board price can produce a higher completed-material quote if fascia, hardware, and delivery are excluded.
Which Trex collection and board length change the price?
Trex collections sit at different price points, with entry-level options generally costing less than premium lines with richer colors or more detailed grain patterns. Exact pricing depends on the retailer and current inventory. Ask for the collection name, board profile, and price per board or square foot rather than comparing quotes that simply say “composite decking.”
Deck dimensions also affect yield. A 12-by-20-foot deck has 240 square feet of surface, but the order should account for board coverage, gaps, perimeter details, and cutoffs. Boards available in 12-, 16-, or 20-foot lengths may reduce waste when their lengths suit the deck; a picture-frame border or diagonal layout can increase cuts and offcuts.
Material grade and design choices can create a meaningful threshold: moving from a basic collection to a premium collection may add roughly $2-$5 per square foot, while a border or contrasting-color design can add another 10%-20% to the board order. Collection and layout should be priced together because a premium board with more cutting waste changes the total more than either choice alone.
Why deck size, borders, and stairs move the estimate
Size changes the total directly, while shape changes the amount of material needed per usable square foot. A simple rectangle usually uses boards efficiently. Angled corners, multiple levels, built-in benches, and picture-frame borders increase cutting and may require additional square-edge boards or trim pieces.
For example, a 200-square-foot rectangular deck with a basic package at $8-$11 per square foot would require about $1,600-$2,200 in materials. A 300-square-foot surface at $10-$14 per square foot comes to $3,000-$4,200. A 400-square-foot deck with premium boards and border details at $12-$16 per square foot could reach $4,800-$6,400, before framing or railing.
Stairs are especially easy to undercount: stair treads, risers, fascia, and additional framing are priced separately from the flat deck area. Measure the deck surface and stair runs separately, then add a waste allowance based on the actual layout.
When delivery, railing, and demolition add to Trex costs
Railing is not included in the per-square-foot surface estimates. Trex and other compatible railing systems can add roughly $30-$100 or more per linear foot in materials, depending on style, posts, infill, and accessories. A deck with 40 linear feet of railing could therefore add about $1,200-$4,000 or more before installation.
Old decking removal and disposal are also separate expenses, commonly around $2-$6 per square foot when charged as a contractor service; the rate varies with access, material, and local disposal fees. Delivery can be a noticeable line item for long boards or limited-access properties. Confirm whether the supplier can unload the order near the deck, and whether the quoted delivery charge includes stairs or special handling.
Request separate prices for decking, railing, stairs, delivery, and disposal so optional work does not get mistaken for the Trex surface price.
How installed Trex material orders compare by project size
Material-only examples help compare quantities without mixing in construction labor. A 240-square-foot deck at $9 per square foot for boards, fasteners, and waste totals about $2,160. A 300-square-foot deck at $12 per square foot with fascia totals about $3,600. A 400-square-foot premium surface at $15 per square foot totals about $6,000, before railing, stairs, or structural framing.
Installation is a separate quote. Decking labor may run about $8-$20 per square foot depending on access, layout, demolition, and regional rates. A two-person crew taking 2-4 days can produce very different labor totals depending on hourly rates and site conditions. Compare material-only estimates with material-only estimates, then evaluate labor and structural work separately.
How to lower a Trex materials order without cutting corners
Keep the layout rectangular where possible, use standard board lengths that fit the deck dimensions, and limit contrasting borders or diagonal patterns if minimizing waste is the priority. Compare the same collection, profile, color, fasteners, fascia, and delivery terms across at least two written quotes. Retailer promotions and bundled delivery can affect the final price, so compare the complete order total rather than a headline board rate.
Order the right quantity from measured plans rather than adding a large precautionary surplus; a straightforward layout often needs 5%-10% extra, while more complex patterns can require 10%-15%. Avoid paying for premium colors or accessories unless they are part of the design plan, and verify that the existing framing is suitable before buying replacement materials. The most controllable savings usually come from simpler layout, accurate takeoffs, and a like-for-like quote comparison.