Trex sells more composite decking than any other brand in North America, and for many homeowners “Trex” has become a generic term for any composite board. The reality is more nuanced. Trex flooring works beautifully for outdoor decks and covered porches, but it has limits indoors, in extreme sun, and on certain substructures that the marketing brochures gloss over.
This guide breaks down where Trex shines, where it disappoints, and what you should know before signing a contract.
What Trex Actually Is
Trex boards are made from roughly 95% recycled material — reclaimed sawmill wood fiber and recycled plastic film, mostly grocery bags and stretch wrap. The mix is extruded into solid or scalloped profile boards in lengths from 12 to 20 feet. The current product lines, from entry-level to premium, are Enhance Basics, Enhance Naturals, Select, Transcend, and Signature.
The cap layer matters more than the core. Newer Trex boards have a polymer shell on three or four sides that resists fading, staining, and mold. The first-generation uncapped Trex from the 1990s and early 2000s had real durability problems — those boards are not what you are buying today.
Pros of Trex Flooring
The big wins are low maintenance and longevity. A capped composite deck does not need staining or sealing, ever. A semi-annual rinse with soap and water keeps it looking close to new. The 25-year fade and stain warranty on Transcend and Signature lines is meaningful — Trex honors it for original homeowners with proof of purchase.
Trex resists splinters, rot, and insect damage, which makes it a smart choice for families with kids and pets. Color choices have expanded dramatically; current lines offer everything from gray-driftwood tones to rich red-browns and tropical streaked patterns that mimic ipe or cumaru.
Cons and Common Complaints
Heat is the biggest legitimate complaint. Dark Trex boards in direct summer sun can reach 140-160°F surface temperature in southern states, hot enough to burn bare feet. Lighter colors run cooler, but no composite stays as cool as natural wood. Plan shade or stick to lighter colors in Phoenix, Vegas, Houston, and similar climates.
Composite is also heavier than wood and slightly more flexible. Joist spacing must be 16 inches on center for residential decks (12 inches for diagonal patterns), and the substructure has to support the extra dead load. Older decks rebuilt with Trex often need joist reinforcement.
Cost is the other sticking point. Trex Transcend material runs $4 to $6 per linear foot of board; installed deck cost ranges from $25 to $45 per square foot, double or triple a basic pressure-treated pine deck.
Trex Product Lines Compared
Enhance Basics is the entry-level scalloped board, available in three colors. Material runs about $2 per linear foot. Enhance Naturals adds wood-grain detail and three more colors, around $2.75 per linear foot.
The Select line is the most popular mid-range product, around $3 per linear foot, with a 25-year warranty. Transcend is the flagship, $4 to $5 per linear foot, with deeper graining and the streaked tropical colors. Signature is the premium hardwood-mimic line, $6+ per linear foot, sold mostly through Trex Pro contractors.
Indoor Use: Mostly No
Trex boards are designed for ventilated outdoor installations. They expand and contract more than wood, need gap allowances at every butt joint, and can off-gas a faint plastic smell when heated. They are not rated for indoor use as flooring inside a conditioned home.
Three-season porches and screened sunrooms are the gray area. Many homeowners install Trex in screened porches successfully, but proper joist gap (3/16 inch end-to-end) and ventilation underneath the deck are mandatory. Skip Trex for indoor playrooms or basements — use luxury vinyl plank instead.
Installation Considerations
Hidden fastener systems like Trex Hideaway clip into a side groove on the boards and produce a clean, screw-free surface. Plan on $1 to $1.50 per linear foot extra for the hardware. Face-screwing with composite-rated color-matched screws is faster but visible.
Picture-framing — running a perimeter board around the deck — gives the install a finished look but requires double joists or blocking under the picture frame. Mitered corners look sharp but expand with heat; many builders specify a butt joint with a tight fit instead of a 45-degree miter for long-term durability.
Trex vs. Other Composites and PVC
TimberTech (now AZEK), Fiberon, and Deckorators are the main competitors. AZEK’s PVC boards are lighter and cooler in the sun but cost more per linear foot. Fiberon offers very similar warranties at slightly lower price points. Deckorators sells mineral-based composite that is rated for ground contact — useful for low-clearance decks.
For pure cost savings, pressure-treated pine still wins at $1 to $2 per linear foot, but expect 10 to 15 years of life with annual staining versus 25+ years with Trex.
Maintenance and Cleaning
Twice-yearly cleaning with warm soapy water and a stiff bristle brush is enough for most Trex decks. For mildew or pollen buildup, use Corte Clean or Olympic Deck Cleaner — Trex specifically warns against pressure washing above 3,100 PSI and against undiluted bleach, which can void the warranty.
Move planters and grills periodically to avoid trapped moisture under furniture, which is the most common cause of mold spotting on otherwise pristine boards.
Frequently Asked Questions
How long does Trex flooring last? Capped composite Trex routinely lasts 25 to 35 years with minimal maintenance. The warranty covers fade and stain for 25 years on Transcend and Signature lines.
Is Trex hot in the summer? Dark colors absorb heat and can hit 140°F+ on full-sun summer afternoons. Light colors and shaded decks stay much cooler. Choose grays and tans for hot climates.
Can Trex be used as indoor flooring? No. It is engineered for outdoor use with expansion gaps and ventilation. Indoor flooring should be hardwood, LVP, or tile.
Does Trex need to be sealed? No. Capped composite Trex never needs staining or sealing. Routine cleaning is the only maintenance required.
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