Frequently Asked Questions


Why are Trex® outdoor living products better than wood? Top

Trex products offer superior durability and performance that you can’t get from wood. Trex decking resists termites, won’t rot, warp, or splinter and never needs staining or painting. What’s more, Trex decking is made from 95% recycled materials, making it an environmentally-friendly choice you can feel great about.

If Trex is made from recycled materials, why is it more expensive than wood? Top

While most of the raw materials used in making Trex are recycled, these materials are carefully processed to ensure the highest level of quality and performance. The end result is decking that performs better than wood, lowering your cost over time through lesser maintenance. To learn more please review our Always Green page.

What is the lifetime value of Trex? Top

With pressure-treated wood decks, maintenance costs add up over time. Although Trex costs more initially, you’ll never have to sand, stain or paint your Trex deck. Over the life of your deck, those reduced maintenance costs add up to a greater value than wood – not to mention the value of all the time you get to spend enjoying your deck rather than working on it.

What is the difference between early-generation and the newer, high performance composite decking? Top

Understanding the differences between early-generation Trex decking and new high-performance Trex decking is an important factor in understanding what to expect from different kinds of decking. There is one benefit both products have in common. Each is made from 95% recycled materials. Everything else is different:

Early Generation Trex
Early-generation composite decking (Trex Origins®, Trex Accents®, Trex Profiles®, Trex Brasilia® and Trex Contours®) represented a breakthrough for low-maintenance and durability. While wood decking inevitably suffered splinters, warping and rotting, and required considerable maintenance, early-generation Trex never had to be stained and did not rot, warp or twist like wood. Periodic cleanings with a composite deck cleaner were far easier than the dreaded sanding and staining required to maintain wood decks. As the category evolved, this early-generation composite was offered in additional colors and with grain patterns that offered a more natural appearance. Even so, all early generation wood-plastic composites, whether Trex or a competitor's product, were not stain, scratch or mold-free, and did fade slightly in color as they naturally weathered. To address these issues, Trex introduced a new kind of high-performance decking in 2010. As of 2014, Trex no longer manufactures any early-generation composite decking.

Newer-Generation High Performance Trex Decking
Newer-generation Trex deck boards (Trex Transcend®, Trex Enhance®, Trex Select®) are manufactured with a high-performance shell that wraps around the composite board to protect it from the elements, providing resistance to fading, staining, scratching and mold. In addition to improved performance, the shell technology offers:

  • Easier maintenance: requiring only an occasional cleaning with soap and water or a presser washer.
  • Enhanced aesthetics: richer, long-lasting color palettes and natural wood grain patterns.
  • Incremental warranty protection: a 25-year limited residential fade and stain warranty

Can you send me product samples? Top

You can find Trex samples a number of ways. At, you can order 12-inch samples of Trex decking in every color. Samples are $7 each, including tax and shipping, and will be delivered to your door by the U.S. Postal Service. You also can find 3 1/2-inch decking samples free of charge at selected local Trex dealers and retailers and through your local TrexPro® contractor.

Decking and Railing

What materials are used in the manufacturing of Trex® decks? Top

Trex decking is made from 95% recycled materials, including reclaimed wood and sawdust as well as recycled plastic from many common household items, such as the plastic overwrap on packaging for paper towels and toilet paper, dry cleaner bags, newspaper bags, grocery and shopping bags. Trex annually salvages and keeps more than 400 million pounds of plastic and wood scrap out of landfills. That makes Trex one of the largest plastic film recyclers in the U.S. In fact, the average 500-square-foot composite Trex deck contains 140,000 recycled plastic bags.

What is the difference between your good, better and best product lines? Top

All Trex high-performance decking & railing products combine low-maintenance upkeep and luxurious style backed by our 25-year Limited Residential Warranty. Beyond that, Trex offers a variety of high-performance decking and railing choices to meet different levels of style, performance and affordability:

  1. Trex Transcend®, offers the broadest range of decking colors and finishes (including five premium tropical colors) with railing options that offer nearly limitless opportunities to mix and match profiles and colors for a customized look. Engineered with a proprietary shell technology that protects against fading, staining, scratching, mold and mildew, Transcend decking offers the ultimate in beauty and performance and is warranted accordingly - covered not only by the Trex 25-year Limited Residential Warranty but also an industry-best, 25-year Limited Residential Fade and Stain Warranty. With Transcend, the beautiful deck you install now will look just as beautiful for decades to come.
  2. Trex Enhance® decking, offers high performance in three versatile colors with fade and stain protection and enhanced mold and mildew resistance. Enhance decking coordinates beautifully with any of our Trex railing lines and also is backed by the combination of our 25-year Limited Residential Warranty and our 25-year Limited Residential Fade and Stain Warranty.
  3. Trex® Signature™ aluminum railing, offers minimalist style with maximum strength. In three colors, Trex® Signature™ is hallmark Trex, with sleek-yet-sturdy construction that emphasizes the view beyond your deck and works well with all Trex decking lines, stone patios and more. Trex® Signature™ also performs equally well for residential or commercial settings. What’s more, aluminum is a 100% recyclable and renewable resource and Trex® Signature™ is backed by the Trex® Signature™/Reveal Limited Warranty.
  4. Trex Select® decking and railing system is our simplest and most affordable high-performance system. Featuring our protective shell technology for enhanced mold and mildew resistance, Trex Select decking comes in five easy-going colors while the complementary Trex Select railing in white is a simple solution for a clean finish. The white rails and balusters of Trex Select can also mix and match with different colors of Trex post sleeves, post sleeve caps and post sleeve skirts.

Will Trex products weather (change color/fade)? Top

How well your Trex deck endures Mother Nature depends upon what type of Trex you have. Early generation composite decks – such as Trex Accents®, Trex Origins®, Trex Profiles®, Trex Brasilia® and Trex Contours® – do not have the high-performance shell with enhanced fade, stain and mold resistance. As such, these traditional composites will fade naturally over time, achieving their weathered color after 12-16 weeks. For Natural Weathering Information, click here. Newer generation high-performance composites – Trex Transcend®, Trex Enhance® and Trex Select® – have the protective shell technology that provides superior fade and stain resistance.

Does Trex decking get hotter than pressure-treated wood under the sun? Top

On a hot day with a blazing sun, nearly any surface will get uncomfortably hot. Lighter colored boards tend to be slightly cooler than darker composite boards. In extensive studies, it has been found that the color of the decking board, regardless if it’s made of wood-plastic composite or wood is the most significant factor in the “heat retention” of the board. In these studies, pressure-treated wood stained the same color as Trex was actually hotter than Trex in the same test conditions.

How much does Trex decking and railing cost? Top

As with many things in life, you get what you pay for. Initially, Trex decking and railing does cost more, board for board, than wood decking and railing; however, the payoff you get over time in decreased maintenance costs and increased leisure time provides compelling value -- so much so, that you’ll often see Trex decks referenced in the listings of homes for sale as an indicator of quality and value that homeowners and real estate agents tout when selling a home. Of course, the real value is in the time that you enjoy spending outdoors on your Trex deck.

Is Trex suitable for use in commercial settings? Top

The breadth of the Trex lineup means that there are Trex products to suit nearly any residential or commercial need. Trex decking is widely used in commercial and public projects throughout the U.S. and around the world, ranging from a landing at Mt. Rushmore and a resort in Dubai, to a pier in Philadelphia and New Jersey-shore boardwalks replacing those destroyed by Hurricane Sandy. Of course, Trex is more than just decking. Trex Elevations® steel deck framing often provides the support beneath commercial projects, ranging from lakeside paths on a college campus in Utah to a large rooftop swimming pool and sundeck in the middle of Manhattan. The sleek profile of Trex® Signature™ railing works as well for commercial and multi-unit residential complexes as it does for your own backyard, while Trex Outdoor Furniture™ can be found in many coastal resorts under Trex Pergola™ installations.

How heavy is Trex decking? Top

Trex boards are 50-70% heavier than comparable lumber sections.

Is Trex code-compliant? Top

All Trex products, when properly installed for approved applications, are either code compliant or are undergoing rigorous code compliance review for the 2009 International Residential Code (IRC) and/or the 2009 International Building Code (IBC). Check with your local building code department for jurisdictional requirements.

Is Trex structural? Top

Trex wood plastic composite products are not structural and should only be used for intended design purposes such as walking surfaces, guardrail systems, fencing and trim; however, Trex Elevations steel deck framing is a code approved structural product (CCRR-0186)

Can Trex be curved? Top

Dramatic curves are a hallmark of Trex decking and railing. Trex composite decking and composite railing can be curved using the Trex CustomCurve® system and still be covered by the Trex warranty. The precise engineering of Trex Elevations steel deck framing also offers homeowners the opportunity to create curved deck designs.

Can a groove be cut in the side of a Trex deck board? Top

Yes, a groove can be cut in the side of Trex decking by using our Trex Groove Cutter to accept our recommended hidden fasteners, a system that enables deck installation without visible screw heads on the walking surface. More conveniently, Trex decking is also available in pre-grooved profiles, ready to install with our Trex Hideaway® Hidden Fastening System.

Can you rip a Trex board? Top

Trex products should not be ripped to reduce thickness, but can be ripped to reduce width. As long as the board can still be installed per the installation instructions, the warranty will be valid. Please use care when fastening ripped boards, as pre-drilling may be necessary.

Can Trex deck boards be glued? Top

Glue cannot be used as a primary fastener. When using Trex Fascia, glue can be used as a secondary fastener – see Fascia instructions in the Installation Guide for more details.

Can Trex be placed over a solid surface? Top

Trex can only be installed over a solid surface when using a sleeper system; see the sleeper system guidelines in our Installation Guide.

Can I paint or stain my Trex boards? Top

The unyielding shell of our high-performance decking–Trex Transcend, Trex Enhance and Trex Select–means it never needs painting or staining. The rich color and protective finish are engineered right into the shell, and are warranted to remain free of rotting, splitting, splintering and insect damage for 25 years.

What makes the Trex Transcend Tropical deck boards different from the rest of the Transcend product line? Top

The signature streaking of Trex tropical boards is achieved through a proprietary process, resulting in a beautifully unique, organic look for every tropical board we produce. This subtle color variation offers the look of luxurious tropical hardwoods, like ipe decks, but without the environmental strain of harvesting endangered woods.

Can I use a non-recommended fastener to install Trex decking? Top

Trex does not endorse the use of any non-recommended fastener. If any condition occurs which is attributable to the use of a non-recommended fastener, such conditions would not be covered under the Trex Limited Warranty. Please see our Installation Guide for more information.

Trex® RainEscape®

Can I use Trex® RainEscape® with Trex Elevations®? Top

Building a brand-new deck from the bottom up is the perfect time to consider the below-deck water drainage product RainEscape, a system of flexible channels that easily works in concert with our Elevations steel deck framing system or with a wood substructure. Please refer to RainEscape for more information.

Trex Elevations®

What is Trex Elevations®? Top

Trex Elevations is a revolutionary steel deck framing system that provides a stronger, straighter, safer and smarter foundation for Trex high-performance decking and railing products. Dimensionally stable steel provides consistency and reliability that wood doesn’t, and is more fire-resistant as well. Leveraging the strength of steel, Elevations can span longer distances between posts and precise engineering ensures surfaces that remain flat over time.

Why is Trex Elevations better than wood deck framing? Top

Trex Elevations leverages the strength and dimensional stability of steel to create a flat surface for the decking above. Wood, on the other hand, often has inconsistent dimension and can warp and twist over time. Those imperfections below can be amplified to the decking above. Many feel that making the investment in high-performance decking, doesn’t it make sense to install it on a high-performance deck frame?

Does Trex Elevations cost more than pressure-treated wood deck framing? Top

In most cases, individual Elevations' components cost more than pressure-treated wood components. The Elevations steel deck framing system does offer efficiencies, not found with wood, including the ability to build longer spans and extend cantilevers with Elevations joists and beams. In addition, Elevations joists are now available in one-foot increment lengths, requiring fewer materials overall. Elevations also comes with a 25-year limited residential warranty, making it a smart investment.

Can Elevations steel deck framing be used in high fire danger areas? Top

Elevations components are non-combustible, carry a Class 1A fire rating and can be used for extreme wildfire building areas such as Wildland Urban Interface (WUI) areas.

Can I build a dock out of Elevations? Top

Due to increased risk of corrosion, do not install Elevations within 3,000 feet (.6 miles) of any body of saltwater or under the surface or within the splash zone of any body of fresh water. Any such installation will void the limited warranty.

Is Elevations code-compliant? Top

Yes. Trex Elevations is CCRR-1086 compliant.

Care & Cleaning

Can Trex decking be sanded or power washed? Top

Trex should never be sanded. Sanding will change the appearance and protective qualities of the Trex material and will void the warranty with respect to any condition caused by sanding.

For our early generation composite decking (Trex Accents, Trex Origins, Trex Brasilia, Trex Profiles or Trex Contours), Trex does not recommend the use of a power washer. Use of a power washer will damage the decking surface and will void the warranty with respect to any condition caused by the power washing.

Trex high-performance decking (Trex Transcend, Trex Enhance and Trex Select) can be power washed. Use only a fan tip and up to a 3100 psi power washer to remove dirt and debris. The fan tip should be no closer than 8 inches (20.4 cm) away from the protective shell during use.

Is Trex decking no-maintenance Top

Trex decking requires far lower maintenance than wood decking, but does require some maintenance to keep it looking good throughout the years, much like washing your car. For early generation composite decking (Trex Accents), periodic cleaning with a deck wash is required. Trex high-performance decking (Trex Transcend, Trex Enhance and Trex Select) require less work – a simple soap and water cleaning is all that is necessary to maintain the beauty of the products.

How do I remove ground dirt from construction of my Trex Transcend decking? Top

A pressure washer with no greater than 3100 psi***** that has a fan attachment/adjustment and soap dispenser may be used to remove dirt, concrete dust, or other types of construction dirt. Spray deck with soap, and then follow by gently scrubbing each deck board with a soft bristle brush. Spray/rinse each individual deck board using fan tip no closer than 8” from the decking surface. RINSE THOROUGHLY. If dirty water from cleaning is left to dry, this will cause a film to remain on the decking surface. ***** Use of a pressure washer greater than 3100 psi could damage the boards and void the warranty

Can I use rock salt to melt ice on my Trex decking? Top

Calcium chloride or rock salt can be used to melt ice and snow on Trex decking. Care should be taken to rinse off when the weather makes this practical. Use plastic shovels (never metal) to remove snow and ice. A metal shovel can possibly chip the decking surface and void the warranty.

How can I clean my Trex Transcend or Trex Select railing? Top

For color transfer issues (color transfer can happen when baluster spacers rub against balusters during installation), use Mr. Clean®, Magic Eraser® Original or Magic Eraser® Extra Power to help remove this. For small surface scratches, marks or scuffs, use Dupli-Color Scratch Seal® Clear Sealer Pen. Never use acetone or other solvents on Transcend or Select railing.

Trex® DeckLighting

Can I use a different transformer with my Tre®x DeckLighting? Top

Trex requires that you use only the Trex transformer supplied with our lighting. Using any other transformer voids the warranty.

Trex® SpiralStairs™

What is Trex Spiral Stairs? Top

Trex Spiral Stairs offer all the space-saving advantages of traditional spiral staircases in two material choices and come with custom, high-performance composite treads made from Trex decking.
Trex Spiral Stairs were developed by the leading spiral stair manufacturer in the country, The Iron Shop, under a trademark license agreement with Trex Company, Inc.

What measurements do I need to order a spiral stair kit? Top

You will need to measure the exact height within .25” between the landing area and the top of the deck, including the width of the decking to ensure that your stairs end on the correct side.

Are there special building code requirements to consider when installing a spiral stair kit? Top

Many areas follow BOCA or UBC codes or variations of the BOCA or UBC codes. All Trex Spiral Stair products pass BOCA/UBC code requirements. We recommend that you contact your local building inspector to find out what code applies to your area and how that code is interpreted.

Are there any special spiral stair kit ordering considerations you need to make for children or pets? Top

For small children and pets, our code stair kits come standard with in-between spindles, which provide less than a 4” spacing between verticals. In addition, you may want to use a gate at the top of the stair.

How long does assembly take? Do I need a contractor to help me install my spiral stair kit? Top

Installing a stair kit is a two-person job. For the typical do-it-yourselfer, the stairs can be installed without the help of a contractor. However, we do recommend that everyone (experienced or inexperienced) consult a qualified contractor. The contractor can help identify whether any additional structural support is necessary and required, and he or she can reroute pipes and electric lines. For two do-it-yourselfers, the spiral stairs can be assembled in about 6-8 hours. For all stair kits, you need basic hand tools and an electric drill. Before installing, we strongly recommend that you read the entire installation manual.

I want to paint my galvanized spiral stairs a custom color. Should I paint them before or after assembly? Should I use any special paint or finish? Top

Galvanized stairs must weather before painting. Once weathered, contact your local paint store for the appropriate primer and paint for something that has been galvanized.

What if something goes wrong? Top

If you run into a problem, call Trex Spiral Stairs at 877-488-1906. Our kits are guaranteed for 25 years from date of purchase. If you ever have a problem, call and we will work to remedy the situation.

What if I lose my installation manual? Top

A PDF of our installation manual is available at

What if my building department or inspector asks for an ICBO number? Top

Installing a stair kit is a two-person job. For the typical do-it-yourselfer, the stairs can be installed without the help of a contractor. However, we do recommend that everyone (experienced or inexperienced) consult a qualified contractor. The contractor can help identify whether any additional structural support is necessary and required, and he or she can reroute pipes and electric lines. For two do-it-yourselfers, the spiral stairs can be assembled in about 6-8 hours. For all stair kits, you neeThe following are available for Trex Spiral Stairs:
LA City Standard Plans for spirals:
  Std Plan 111-T City of Los Angeles for CBC/IRC Metal Spirals for all Trex Spirals
  Std Plan 111 has also been adopted for City of San Diego, Calif.

City of Los Angeles Licensed Steel Fabricator #1150 (City of Los Angeles conducts random inspections on our fabrication plant in Broomall, Pa.)
County of San Bernardino Licensed Fabricator

Trex® OutdoorStorage™

Is Trex Outdoor Storage cabinetry built from Trex decking? Top

No. Trex Outdoor Storage is built using 3/4" white PVC boxes with the exterior doors and parts molded from a high density resin. Both are closed cell and 100% waterproof.

Is the Trex Outdoor Storage color only on the surface? Top

Yes. The exterior is a very high quality finish that has a UV inhibitor to protect the color from fading. The resin is extremely dense and chip and scratch resistant so the finish is hard to penetrate. If a chip or scratch does happen from a hard impact, the area can easily be repaired with our touch up kit or any matching Minn Wax crayon or marker you can get at your local hardware store.

Are the resin doors very light? Top

Actually the doors are built with an ultra high density resin giving the doors extreme hardness and actually weigh more than a real cypress wood door. The PVC boxes are similar in weight to 3/4" plywood.

Does the resin contain any wood fibers? Top

No, the doors and all parts are 100% high density waterproof resin.

The doors look like they are made in sections. Are these resin sections glued together? Top

All Trex Outdoor Storage doors are made with one solid mold, giving the look of a multi pieced door but with no chance of the separation you can see in real wood doors.

Can the resin be painted? Top

Yes. All resin parts are painted and top coated with a product that can be easily painted over with oil or latex paint. Glazing over the paint works great as the glaze goes into the natural grain of the product which enhances the realistic look.

How do I clean the cabinets? Top

The PVC interior and the exterior High Density Resin cleans up with soap and water. Interiors and Exteriors can be sprayed with a hose as all the materials used are waterproof.

Can the cabinets be power washed? Top

As stated above, a standard hose pressure is all that is needed to clean this product.

What is the hardware made out of? Top

Trex Outdoor Storage cabinets use stainless steel 110 degree self closing hinges and stainless steel full extension drawer guides. Stainless steel screws are used to secure cabinet boxes in addition to PVC adhesive that actually bonds the boxes together giving a product that will not ever separate.

Is assembly required? Top

No. All cabinet boxes come assembled. A separate trim is available for our skirting insert boxes to frame out the boxes to create a finished projected side. This allows installation of brick, stackstone, and other exterior skirting coverings to neatly fit the box.

Do the drawers and doors keep out rain? Top

Both our drawer fronts and doors fit tight to the box front that helps keep rain out. Fully exposed cabinets in a high wind and heavy rain may experience some moisture getting into the cabinet, but this is in extreme conditions.

How do the cabinets hold up with full sun exposure? Top

Our high quality UV protection top coat will reduce fading. Resin products tested for over 6 years in full sun exposure have shown very little sign of fading.

Do I need to prepare my deck for the cabinets? Top

Only if you are using the insert cabinets that slide into your skirting. An opening with a deck must be built into the side of the skirting so the cabinets can simply be slid into the space. The deck cabinets are simply mounted to the wall. If used as an island, panels are available to cover the back. Island cabinets can be secured to the deck for high wind areas using our PVC blocking.