Composite Decking VS Wood Decks

By Lawrence Winterburn

Updated  01-06-2014

Composite decks are maintenance free       Inaccurate

Man made decking is better than wood                 Inaccurate

Composite decking lasts forever               Inaccurate

 The Composite Debunk

composite decking vs wood decks



Many millions of dollars are spent to glamorize composite decking products.  I am faced with the task of deprogramming people that are absolutely sure that all composite decking is wonderful. As a tradesman and designer I get a chance to see these products after a few years of service, with all their flaws exposed. It puts me in a position to question the promises and dissect the language in their marketing materials.

I've fielded hundreds of phone calls and emails over the years from people that bought the promises of the composite companies. Many were disappointed when the warranty turned out to be void because the company just wasn't there, wasn't honoring the warranty or their issue was excluded from their warranty. The sad part is that most of the people didn't research the product until long after they bought and they started having problems. Its human nature I suppose; we trust too much. I find myself in the middle of two groups of people equally as passionate and insensed with a product.

We see the new decking shows where they use nothing but Trex, (they sponsor the show), and everything looks so wonderful through the camera's eye. They don't show you the details that don't work--the shoddy workmanship or any of the flip side of that coin, but I will spare you that rant. That's another article!

I have heard noises recently about virgin PVC products being the focus of a class action suit. PVC materials may have a tendency to be stained by cooking oils, and tanning butter. If you apply tanning lotion and then lay on the deck, you may have a permanent "Shroud of Turin effect." I have noticed that the products go a bit chalky and fade out over time, so there just might be merit to the claim. Maybe we can talk about that law suit later in the year.

Trex Class Action 2013

Trex has a conditional settlement in place for its latest class action suit. The summary of it is, they will pay you 20% of what you paid for the product or what the contractor paid for the decking up front, and about 50 cents a foot towards the labor to install it. We charge about $15.00 per square foot to change decking on a typical deck, so 50 cents a foot is a paltry amount. You won't get your decking changed that cheap. If you can live with looking at the deck, take the money.

If you used a cleaner to try to get rid of the mold, and you kept the receipts, they will pay you $18.00 a jug.

If you want to roll the dice once more and use their "New and Improved decking", they will give you a 50% discount on decking and fasteners. If you choose to remove the old decking, unfortunately you will have to pay for the removal, transportation and disposal of the old decking. That factor wasn't adressed in the agreement.

Maybe Trex has cured the problems with their decking by switching production to their new cased product--and maybe the Ford Pinto, and Chevy Vega will be discovered to be masterpieces of human engineering. There will likely be fading issues, and the casing might be expanding and contracting at a different rate than the core, so we will wait for the jury on these new products and hope for the best.

It's not easy being a forerunner in the development of man made products that are competing with something brilliant created by evolution. Red Cedar, Redwood, Cypress and Mahogany have been growing and adapting to a rain forest environments for millennia. When you take them out of their rainy environment, and use them in a dry environment they last for decades. Their intrinsic beauty and earthy look is something we find attractive as humans. This is why the composite decking companies try to make their products look like wood--which may well be, part of the problem.

mold on trex composite decking click to enlarge

If you have had any issues like this, please send us an email with your name and contacts and tell us about your story at  

Composite Decks are Maintenance Free

Composite decking manufacturers stopped claiming “Maintenance Free” when describing their products due to court settlements early on. Currently they refer to their decking as “Low Maintenance”.

They will tell you that their products will require cleaning a couple of times a year to make it look good again. 


The cleaners leave the decking looking powdery. They are acidic and chemically strip the finish and kill the mold for a time. Green clients should be aware that to “maintain” these products it involves splashing chemicals around your yard. A good stiff brush is required to physically scrub the decking, so it isn't like mopping a floor in your house. 


Composite is Better than Wood for Decks


If it is better than wood—why are they trying to emulate the look of wood. The new products are quite convincing. Big hunks of plastic with wood grain and variable coloring to emulate the look of wood. Sure, it will likely fade, but when it is installed it looks just like wood.


Only wood is wood. Ipe or Mahogany will likely have a durability of 40 years if oiled yearly. A wood deck can be refinished every few years to look like new again.


Refinishing a composite deck is now possible, but with varying results—Normally if it gets too tough looking you replace the decking. 5 years from now, your composite deck will look like a 5 year old composite deck—with scratches and stains. When you attempt to change a board or two--it is more than likely that the new boards will be an entirely different color than the faded boards you have presently.


scratches on composite decking stain on composite decking stains on composite decking click to enlarge


Composite Decking Lasts Forever


When buried in a landfill—composite decking may very well last forever. They say a plastic shopping bag will last 1000 years underground, it is a safe bet that composite boards will also do just as well when buried. Long after you have tired of your stylish composite deck, it won’t be recycled; it will go to the landfill with plastic patio chairs and the rest of the non-recyclables. This deck was photographed by Glenn Stewart a home inspector in California. . 

We don't know what brand of composite the photo below is. These are photos that no Composite Company wants you to see. 

 old composite decking  Composite Decking Failures

Composite Decking News

Many local lumber yards have cut back on their composite offerings. Most of the builders I know are apprehensive to install composites due to the now omnipresent rumours of failures and unhappy clients. It is becoming apparent that after a few years composites simply don't look like they did when they were installed. Color fading and the necessity to clean with the harsh chemicals leaving the decking chalky and porous are just a couple of the issues for these products. Many of the pre-finished wood decks and pergolas found in our gallery were 5 years old when they were photographed, and look much like the day they were installed.

Timbertech has had some serious color fading issues and one local deckbuilder had 2 failures within 1 year, (large decks). As a solution, they tried a new product designed to bond to composite decking. I will be having a look at the coating this summer to see how it is lasting and if it is successful, we will tell you all about this coating system for composite decking.

Numerous class action lawsuits have been initiated against Trex, now apparently settled.  They also had a voluntary broad scale warranty issue stemming from flawed composite decking from a now moth-balled plant. You really have to temper their marketing and warranty promises due to their history. Trex has since come out with a version of their decking which is wrapped with a coating to address the mold issue, though, being new, time will tell if it is a viable solution.

Since this article was written we have literally had hundreds of phone calls and emails expressing horror stories as a result of people buying composite decks through builders. We get many calls from clients that are looking for replacement decking and parts for products no longer produced.

The issue of  Warranty is not being addressed by the composite companies. All but one manufacturer warranty that I have seen excludes the cost of disposal and labor to replace the decking from their warranty. This is the composite industry telling builders that they do not value their time. This is akin to pitting our clients against builders across the country. If you are a builder recommending composite to a client for their deck, you are putting yourself in a potentially dangerous financial position of  being libel for damages, ie. you may be bound to supply your labor for free to replace faulty composite decking. Lets face it--if you make composite decking that is faulty, you cannot ignore the fact that to make the client that purchased the composite decking whole, you need to cover labor and disposal of the defective decking. These companies are relying on slick marketing rather than reputation.

Evergrain (Tamco), actually offers a 5 year warranty that includes replacement costs--Not Disposal of Faulty Decking Product though, which I find strange. Why not go all the way? Though with anything, you need to do research before buying. I didn't  find many complaints about Evergrain, when I searched, but you should do your own research before buying any composite product. When you buy a man made product like composite decking, you need to weigh all the factors. Most builders like the product, but how many of them have that decking that they recommend on their own home and are still happy with it a decade later. Unfortunately most deck builders never return later to see how the decks they build look 5-10 years later. I see this warranty change as a serious positive.

Composite Companies Closed in the past few years.  (A list in progress)

When a decking manufacturer closes, the implied warranty is worthless. Maybe we need to asess their stock before buying to get an idea of whether they will be there to honor a warranty.

Correct Deck  Filed Chapter 11 Bankruptcy and sold all of its assets to a subsidiary of Building Materials Corporation of America (BMCA) in 2009.  To see a large set of comments about Correct Deck (click)  (composite decking warranty--Contact CorrectDeck Directly)
CPI Plastics (EON),  Went through a restructuring and could not meet its financial comittments, was liquidated by the creditors in 2009 (composite decking limited lifetime warranty--Worthless)
Xtendex   Manufacturing plant in Barrie (Carney Timber Products) closed and was liquidated.  2007
Dexx    Composite decking plant in Bolton Ontario burned to the ground in 2005. For some reason they never resumed production.
ProCell   Purchased by AZEK 2008
GeoDeck  Original company no longer operating, Name has been sold to 2 companies since and warranty is no longer valid.
Brite    Bankrupt in 2007, business closed in 2008  (no warranty service)
Elk Cross Timbers   Purchased in 2007, Closed in 2011
Monarch Deck Products   (Green Tree Composites)  Closed in 2008
Life Time Lumber   Business Closed 2011

There are hundreds of now defunct composite decking companies, this is a list of the largest that we know about companies. Please let us know if there are others you feel should be added to this list.

Coupling Vinyl with Wood


First generation composites were recycled plastic/vinyl mixed with wood.  Unfortunately the “Pulp” wood they use is made from high sugar species of wood, which are not known for outdoor durability such as pine, spruce and bark from these trees. This is left over wood that isn’t good enough to use to make paper from.


Since this wood absorbs moisture, then dispels it this creates a pocket within the vinyl that soaks up moisture every time it gets wet. Over time this produces black mold—like in an un-vented shower stall and it will never subside. Cleaners may make it look alright for a few days—but it will always come back and normally worsens with each treatment. 


If composite decking contains wood or pulp it may be prudent to steer clear of the product.


Warrantees offered by composite decking manufacturers are notorious for pointing out their tragic flaws. Pool chemicals, mechanical wear, mold growth are often not covered by their limited lifetime warrantee.


Composite Decking Testing Methods


 Generally, when they test composite decking durability and color-fastness they test for the equivalent of about 6 months in the real world. Furthermore manufacturers have told me that each batch of composite decking will be a slightly different color. I haven’t personally seen a composite testing that included testing for freeze thaw stability.  

Fade Resistant Composite Decking 


Many manufacturers are marketing their decking as fade resistant. Since the testing is a vague thing, once it gets into the real world it is likely to be a different case. All composite decking fades over time. Here are photographs of  Trex Brasillia sent in by Robert Rackish in 2010.  "Little did we know that it would fade and pick up stains easily",  he said in an email. He went on to say he has been searching for a product that would restore the color and hasn't found anything yet.

composite decking fading  Composite decking faded  

Robert wetted the decking to show what the original color looked like. In the first photo you can see the two scraps that are the original color on the faded background.


Is Composite a Structural Material?

When you can legally use composite for joists and handrails then it will be deemed structural materials. Most composite hand-rails are not Building Code Legal. Most composite manufacturers advise to create a frame that has the joists about 12” apart, rather than the typical 16” since the materials will tend to sag under its own weight.

composite decking structural failure Structural Failure of Composite Decking


 We get numerous people asking for composite pergolas. Since we can’t fasten to it, or span more than a couple of feet without deflection, designing a pergola is a challenge we just don’t see as worthwhile.



Vinyl Decking (without wood pulp—Virgin Vinyl)


Virgin vinyl decking seems durable and long lasting. One of our builders says he decides which composite is good by laying it on something solid, hanging a 3” corner off the edge and giving it a good whack with a hammer. If it shatters off—Don’t use it. He sticks to Virgin Vinyl products and has had good luck. (EON by CPI is not Virgin Vinyl, we would suggest it is a PVC product classed with plastic patio furniture)


Virgin Vinyl decking does expand and contract a great deal and this needs to be accommodated by using different methods for fastening and leaving tolerances (spaces) to allow expansion based on temperature. Variance of about 150 degrees F should be standard in North America, which means up to 2 or 3“ of expansion should be expected with some products for a 20' piece of decking. Most builders cut the material into shorter pieces so that this expansion is easier to hide. 


PVC and Composite Vinyl  Fences

Many builders claim that vinyl fencing has improved over the years. Here are some photos of vinyl composite fencing failures. UV breaks down PVC. Spray paint will be nearly impossible to remove.


grafitti on composite fencing vinyl composite fence vinyl fence failure



Builders Selling Composites may have to supply free labor to replace decking?

Speaking as a builder, we have a tough enough time getting jobs finished on a schedule and on budget. We work long hard days to keep our clients happy, and when a warranty issue with a composite decking company causes this relationship to be jeaprodized, we need to make tough decisions. Only Evergrain offers a 5 year Limited Warranty that covers Installation Costs--but not disposal costs.


A visit with Tom from Hickory Dickory Decks


Tom was kind enough to show me around a few composite decking installations in Burlington.  The decks looked good—that’s why he’s our competition in many areas. He tells me that 90% of their work is composite decking. I offer a great thanks for his time showing me his work.


Being a large company with many sub-contract employees it is hard to keep a tight control on quality control so there were flaws here and there. I think their work is quite good generally.


Many of the decks realistically did not look 3 years old, but they may have been close. At the time of this revision we did not have disclosure as to how old exactly they were. Regardless, there were flaws in some that indicated that they were likely in the range of 3 years old.


composite decking by HDD covered composite porch- 5 years old composite decking on pressure treated joists click to enlarge


All the decks I saw had obviously been professionally cleaned. Some of the composite decks containing wood showed evidence of mold growth and staining.

mold on composite mold on composite decking


Expansion had caused some boards to shear screws, and there were quite a few joints that didn’t quite line up. Plastics expand when you heat them, and contract when you cool them. Unless the temperature is the same as the date of installation there will be gaps and/or pressure distortion.


expansion composite decking shearing fasteners expansion uneven joints composite expansion composite decking


Wood expands when it absorbs moisture, and shrinks when it dispels it. This factor has to be accommodated by leaving spaces or using special techniques to minimize the visibility and effects.


Be Careful out there!




Note: the opinions expressed in these articles are simply an opinion of the author. No malice is intended. If you have information or evidence of errors or possible corrections we invite your comments at

For our other articles and information about Composite Decking Articles (click)

Wood Decking can be low maintenance Wood Decks (click)