By Joshua Harden | Founder, Acumen Renovations | Kansas City, KS
QUICK ANSWER
Composite deck warranties are written by lawyers, not engineers. The headline numbers, 25 years, 50 years, lifetime, sound comprehensive until you read what’s excluded. Improper installation voids coverage. Fading thresholds weaken significantly after year 25 on some products.
Labor costs are rarely included. And when manufacturers do agree to replace failed product, some require you to sign a document preventing you from ever discussing what happened. Acumen Renovations is an authorized installer for Deckorators and Fiberon.
This is what we have seen in thirty years of building and tearing out composite decks in Kansas City, and what the warranty brochure will never tell you.
What Happened on One of Our Jobs
In the interest of being direct, this is what happened to us on a specific job.
A client wanted a composite deck using a specific product from TimberTech. The boards failed. Not from maintenance issues. Not from improper installation. The boards were splitting on the ends, a structural failure that has nothing to do with how the deck was cleaned or what was spilled on it.
We contacted TimberTech on behalf of our client and initiated a warranty claim.
Their response was to offer replacement boards. No labor compensation. They expected us to remove the failed product and install the replacement boards entirely at our own expense, on a failure that originated with their product.
That alone was frustrating. What came next was something else entirely.
As a condition of receiving the replacement boards, TimberTech required both us and the homeowner to sign a document. That document would have prevented either of us from ever publicly discussing what happened, the failure, the claim, or the resolution. In exchange for boards we were expected to install for free, we were being asked to permanently surrender our right to talk about it.
We refused.
We purchased replacement boards ourselves and made our client whole out of our own pocket. We have not purchased a TimberTech product since.
I am not telling you this happens on every TimberTech job. I am telling you it happened on ours. And I am telling you it because every homeowner who is about to spend $15,000 to $40,000 on a composite deck deserves to know that warranty negotiations can go this way, and that some manufacturers consider silence a condition of making things right. Knowing how long decks last in Kansas City is only useful if the warranty protecting that investment is actually enforced.
Why Warranties Look Better Than They Are
The headline warranty numbers in composite decking are genuinely impressive on paper.
25 years. 30 years. 50 years. Lifetime.
What most homeowners never read is what comes after those numbers. The exclusions. The limitations. The definitions buried in the fine print that determine whether a claim is valid or dismissed before anyone picks up the phone.
Composite deck warranties are not designed to be used. They are designed to be marketed.
Here is what we found when we read the actual warranty documents from the four largest composite decking manufacturers. As residential general contractors in Kansas City who have installed and torn out composite decks for nearly 30 years, this is what residential home improvement really looks like behind the brochure.
Trex
The fade threshold that shifts after year 25.
Trex uses 5 Delta E as the fade threshold for the first 25 years, the same standard as the other manufacturers in this comparison. What most homeowners never read is what happens after that. For premium products warranted beyond 25 years, Transcend at 50 years, the threshold jumps to 15 Delta E for years 26 through 50. A color change of 5 Delta E is barely perceptible to the human eye at close range. 15 Delta E is a dramatic, visible color shift. During the second half of a 50-year warranty a deck can fade significantly, obviously, visibly, and still not qualify for a claim. The headline says 50 years. The fine print says the protection meaningfully weakens at year 26.
Improper gapping voids everything.
Their warranty document explicitly states coverage is void for “improper installation including but not limited to improper gapping.” Trex defines the gap requirement. If any deviation from their specification occurred, intentional or not, the warranty is gone. This is particularly relevant because gap requirements vary by product line, by installation temperature, and by board orientation. Getting it wrong on one board in one location gives them a technical exit on the entire claim.
A metal shovel voids the warranty.
Documented in their own FAQ. Use a metal shovel to remove snow from your Trex deck and the warranty is voided on any condition caused by that action. This is not a hypothetical, it is in their published materials.
Sanding voids the warranty.
Also documented explicitly. A contractor who sands a board to address a surface issue has voided coverage on that board entirely.
No TrexPro registration means no labor warranty, period.
Trex’s own labor warranty document states verbatim: “provided that a TrexPro® contractor installed the Products and properly registered the Warranties, Trex will pay for all reasonable labor expenses in replacing the defective Products.” If the contractor who built your deck was not a registered TrexPro at any tier, no labor coverage exists regardless of what failed, how new the deck is, or how clearly the failure is a manufacturing defect. Trex will send replacement boards. You pay every dollar of labor to swap them out.
The Enhance line is excluded from labor coverage entirely.
Even for TrexPro registered contractors, the labor warranty explicitly excludes Enhance Basics and Enhance Naturals decking and fascia, as well as Enhance Steel and Enhance Composite railings. These are two of Trex’s most commonly sold product lines. A TrexPro contractor who installs Enhance has no labor warranty coverage on those boards regardless of tier or certification level.
TimberTech / Azek
The Low-E glass exclusion.
This one requires a moment to absorb. TimberTech’s warranty document excludes damage caused by “reflected sunlight from low-emissivity glass.” Low-E glass is the energy-efficient glazing used in most modern windows, including windows on neighboring homes and buildings. If a neighbor’s window reflects sunlight onto your deck and causes fading or surface damage, that is explicitly excluded from coverage. You have no control over your neighbor’s windows. TimberTech has no liability for what their product does when light hits it from a direction they didn’t anticipate.
Fading and staining on the underside and ends, not covered.
Their warranty explicitly excludes “any fading or staining not on the surface of the Product, i.e., the underside or the ends.” The underside and the ends of composite boards are where moisture enters and where WPC products begin to fail. The most common failure points are specifically excluded from coverage.
Mold and mildew are classified as environmental conditions alongside hurricanes.
Their warranty lists mold, mildew, and air pollution as excluded “environmental conditions” in the same clause as flooding, hurricanes, earthquakes, and lightning. Mold growing on a composite deck in a Kansas City summer, which happens, is categorized the same as a natural disaster.
The stain claim process is designed to exhaust you.
To file a stain claim under TimberTech’s warranty the process works like this, their own warranty document requires it in sequence. First you must attempt to clean the affected area yourself within one week of the spill. If that fails you must then hire a professional deck cleaner at your own expense. If the stain still remains after professional cleaning you may then file a warranty claim. That claim must be filed within 30 days of the professional cleaning. Miss that 30-day window, after already spending money on professional cleaning, and the claim is denied. The process is structured so that most homeowners either give up, miss the window, or spend more on cleaning than the claim is worth.
Labor warranty requires registered contractors.
Their labor warranty is only available when a registered TimberTech contractor performs the installation. If your contractor was not registered at the time of installation, regardless of their experience or the quality of their work, no labor coverage exists on any claim.
Fiberon
They already lost a class action lawsuit over this.
In 2012 a federal class action lawsuit was filed against Fiberon alleging that certain composite decking products had a latent defect causing dark spotting from mold, mildew, and fungal growth. Fiberon’s defense was that the problems were caused by environmental issues, improper maintenance, or other issues excluded from warranty coverage. They settled the case. The homeowners who experienced the failure, and were told by Fiberon it was their own fault, received settlement vouchers. The warranty exclusion language that Fiberon used to deny those claims still exists in their current warranty documentation.
Non-Fiberon fasteners may void the warranty on related failures.
Fiberon’s own FAQ states explicitly: “Using another manufacturer’s product will void your warranty.” Their actual warranty document is more precise, it voids coverage “to the extent that the Fiberon Product failures resulted from the use of non-approved fasteners.” In practice this gives them significant latitude to attribute any board failure to the fastener choice. Their own documentation confirms: Fiberon EDGE and EDGEX fasteners are the only approved hidden fastener option. A contractor who uses a competitor’s clip, even one that functions identically, has handed Fiberon a technical exit on any claim where they can point to the fastener as a contributing factor.
Labor warranty requires a Fiberon Certified Installer.
Like Trex and TimberTech, Fiberon’s labor warranty is not available to all contractors. Fiberon’s own warranty page states: “Coverage is available only through a pre-qualified Fiberon Certified Installer.” If your contractor is not pre-qualified by Fiberon at the time of installation, there is no labor warranty coverage regardless of what the product does. Fiberon offers 5, 10, or 15-year labor warranties on select products, but only when installed by their certified network.
Fiberon must inspect before you repair anything.
Their warranty requires that Fiberon physically inspect any claimed defect before permanent repairs or removal of materials may be undertaken. If you repair the board before they schedule and complete an inspection, warranty void. In a Kansas City winter that can mean leaving a structurally compromised board in place for weeks while waiting for an inspector to arrive. The homeowner bears the risk of that wait.
Rental properties are excluded entirely.
Their warranty explicitly states that a primary or secondary home “does not include rental property.” Investment property owners have zero coverage under any Fiberon warranty regardless of product line, installation quality, or how recently the deck was built.
Deckorators
This one is different, and worth saying so.
Acumen Renovations is an authorized installer for both Deckorators and Fiberon. We have installed more Deckorators product than any other composite brand over the past eight years. In that time we have not had a single unresolved warranty issue.
On two separate occasions Deckorators reached out to us directly to resolve product failures on decks we did not originally install. They identified the problem, accepted responsibility, agreed to our standard labor rates without negotiation, and paid us to make the homeowner whole. We were not the original contractor on either job. They found us, hired us, and paid us, without asking us to sign anything, without questioning our rates, and without making the homeowner fight for it.
That is not common in this industry. It is the reason we recommend them.
Their own press materials describe this as unique to Deckorators, and our experience confirms it is real, not just marketing language. This has also been confirmed by the National Deck and Railing Association.
This is part of why we install Deckorators. The product performs. And when something goes wrong, which happens in construction, they stand behind it without requiring silence as the price of resolution.
That said, their warranty is not without limitations worth knowing:
Transferability is limited but better than most. Unlike several competitors, Deckorators premium decking warranties are transferable once to a subsequent buyer within five years of original purchase. This is a meaningful advantage over manufacturers whose warranties die entirely with the original purchaser. That said, transferability is not unlimited, check the specific product line’s warranty document before assuming full coverage transfers.
The MBC line carries a 50-year structural warranty. Deckorators’ mineral-based composite (MBC) products, Voyage, Vault, Frontier, carry a 50-year structural warranty, not 25. If you are selecting a Deckorators product and longevity is the priority, the MBC line with ground and water contact coverage and a 50-year structural warranty is meaningfully different from their WPC entry-level products. Ask your contractor which line you are getting before signing anything.
The 48-hour spill window. Stain coverage requires that food and beverage spills be cleaned within 48 hours. That is tighter than most manufacturers and a window that is easy to miss.
The claim release language. Their warranty documentation states that if Deckorators elects to replace or refund a product the purchaser must “forever discharge Deckorators, its subsidiaries, parents, affiliates, and their respective officers, directors, and employees of and from any and all claims.” Accepting a replacement under warranty closes the door on any future legal action related to the failure. This is standard legal language and not unique to Deckorators, but homeowners should understand what they are agreeing to when they accept a warranty resolution.
Even with those limitations, Deckorators’ warranty is the most contractor-friendly and homeowner-friendly in this comparison. We have used it. It works the way it is described. That matters more than any brochure.
What All Four Share
Every one of these warranties shares the same fundamental structure.
They cover the least likely failure scenarios comprehensively. Termite damage. Fire. Structural collapse from an external force. These are covered thoroughly because they almost never happen.
They exclude or limit the most likely failure scenarios. End grain moisture absorption. Surface fading from normal UV exposure. Mold growth. Installation deviations. Labor costs. These are the things that actually happen, and these are where the language gets specific, the thresholds get high, and the processes get exhausting.
And when a homeowner does navigate the process successfully, some manufacturers consider silence a fair exchange for making things right.
What to Do Before You Buy
Read the actual warranty document, not the brochure.
The brochure shows the headline number. The warranty document shows the exclusions. They are different documents. Ask your contractor for the full warranty document before you commit to any product.
Ask about the labor warranty specifically.
Does the warranty cover labor to remove and replace failed product, or just the product itself? If the answer is just the product, understand that a board failure five years from now means you pay for the labor to fix a manufacturer’s problem.
Ask who installs it.
Some labor warranties require installation by a certified or registered contractor. If your contractor is not registered with that manufacturer, the labor coverage may not apply regardless of what the brochure says. Understanding deck subframing options is part of knowing whether the installation is being done correctly from the ground up.
Ask about transferability.
If you plan to sell the home in the next 25 years, and most people do, ask whether the warranty transfers to the next owner. Several do not.
Ask your contractor what they have seen.
A contractor who has been installing and tearing out composite decks for decades has seen how manufacturers respond when products fail. That information is not in any warranty document. Ask for it directly. Understanding what bad contractors get wrong when building a deck is one of the most useful things you can know before hiring anyone.
The Bottom Line
A 25-year warranty on a composite deck sounds like protection. In most cases it is a marketing document with a legal framework designed to minimize manufacturer exposure.
The deck that holds up over time is not the one with the longest warranty number on the brochure. It is the one built with the right product for the application, installed correctly by someone who knows what they are doing, by a contractor who has enough history with the manufacturer to know what happens when something goes wrong.
We have been doing this in Kansas City for nearly 30 years. We install Deckorators because of how they perform and because of how they behave when they don’t. We walked away from TimberTech because of what we described at the top of this post.
The warranty is not the product. Ask the right questions before you buy either one. Whether you are comparing bids from local general contractors near me or working with a home renovation contractor you already trust, the questions in this post are the ones to ask before any contract is signed. Verify deck contractor credentials in Kansas City before committing to anyone.
Work With an Authorized Installer Who Stands Behind the Product
Acumen Renovations is a certified Deckorators and Fiberon installer in Kansas City. We have filed warranty claims and we know how manufacturers respond. Free site visit, no obligation.
(785) 979-3636 Request a Free Site Visit
Mon – Fri | 9AM – 5PM | Serving Kansas City, Overland Park, Leawood, Lee’s Summit & surrounding areas
This is part two of a two-part series on what the composite decking industry does not tell you. Part one covers the deck ventilation myth, the math that proves your deck already has nearly 600% more airflow than any standard requires.
Joshua Harden is the founder of Acumen Renovations, a Class A licensed general contractor serving the Kansas City metro including Overland Park, Shawnee, Prairie Village, Leawood, Kansas City KS, and Kansas City MO. He has nearly 30 years of experience in exterior renovation including decks, siding, windows, doors, and full ground-up residential construction. Every post on this site comes directly from what he sees in the field, no ghostwriter, no agency. Acumen Renovations holds an A+ BBB rating and has been named a Nextdoor Neighborhood Favorite in 2022, 2023, and 2025.
Frequently Asked Questions
What does a composite deck warranty actually cover?
Most composite deck warranties cover structural defects, fading beyond a defined threshold, and permanent staining from food and beverages. What they frequently exclude is labor to remove and replace failed product, damage to board ends and undersides, fading below their defined threshold, and any installation deviation from their published guidelines.
What voids a composite deck warranty?
Common warranty voiders include improper board gapping, using non-approved fasteners, applying paint or coatings to the surface, using non-approved cleaning products, failing to clean spills within the specified window, and installation by a non-registered contractor depending on the brand.
Does TimberTech cover labor costs in their warranty?
TimberTech’s labor warranty is only available when a registered TimberTech contractor performs the installation and only for specific product systems. Non-registered contractor installations carry no labor warranty coverage.
Does Trex cover labor costs in their warranty?
Only if a registered TrexPro contractor installed the product and properly registered the warranty. Trex’s own warranty document states verbatim that labor coverage applies “provided that a TrexPro® contractor installed the Products and properly registered the Warranties.” Non-TrexPro installation means no labor coverage. Additionally the Enhance Basics, Enhance Naturals, and Enhance railing lines are excluded from labor coverage entirely, even for TrexPro registered contractors.
Does Fiberon cover labor costs in their warranty?
Fiberon offers 5, 10, or 15-year labor warranties on select products, but only through pre-qualified Fiberon Certified Installers. If your contractor is not pre-qualified by Fiberon, there is no labor warranty regardless of what fails.
Which composite decking brand has the best warranty?
Based on our experience and review of actual warranty documents, Deckorators offers the strongest contractor and homeowner-friendly warranty, specifically their 25-year removal and replacement coverage that includes actual labor costs. Azek’s lifetime product warranty is strong on the material side. Trex and Fiberon have significant exclusions that limit practical coverage.
Can a composite deck warranty be transferred when a home sells?
Most composite deck warranties are non-transferable or have strict transfer limitations. Deckorators explicitly states their warranty is non-assignable. Trex allows one transfer within the first five years. Always check transferability before purchasing if you plan to sell the home.
What is the Delta E fade threshold and why does it matter?
Delta E is a measurement of color change. Most composite manufacturers use 5 Delta E as the threshold for excessive fading, a change barely perceptible at close range. Trex uses 15 Delta E for years 26 through 50, meaning the deck must fade significantly more dramatically before their warranty covers it. Understanding the threshold tells you how much visible fading you will have to accept before a claim is valid.
What should I ask a contractor before choosing composite decking?
Ask what product they install and why. Ask what manufacturer they have walked away from and why. Ask whether they have ever filed a warranty claim and how the manufacturer responded. Ask specifically whether the warranty covers labor. A contractor with 20 or 30 years of experience has information no brochure will give you.
Related reading:
