Trex vs TimberTech vs AZEK vs MoistureShield: Composite Decking Compared for Florida

Once people decide on composite instead of wood, the next question is always the same. Which brand?

It feels like it should have a clear answer. Four names come up in almost every conversation we have: Trex, TimberTech, AZEK and MoistureShield. They all promise low maintenance, no splinters and no staining, and on a sample board in a showroom they look close enough to interchangeable.

They are not. The biggest differences between them are not about colour or grain. They are about what the board is actually made of, and that decides how it behaves in Florida heat, over Florida soil and next to Florida salt air. We install all four, so this is how they look from the framing up.

Composite and PVC are two different materials

Almost everything that gets sold as “composite decking” falls into one of two families, and it helps to separate them before looking at any brand.

Capped composite is wood flour bound in plastic, wrapped in a protective polymer cap. The core gives the board its stiffness and its wood-like weight. The cap does the hard work: it blocks the sun, resists stains and keeps water out of the core. Most of the composite decking in Florida backyards is this.

Solid PVC has no wood content at all. It is cellular PVC through and through, usually with its own cap. Because there is no wood fibre inside, there is nothing organic to absorb water or heat, and the board is lighter than composite of the same size.

Those two families behave differently in exactly the places a Florida deck gets tested. So when someone asks us about “Trex versus AZEK”, we usually start by saying they are not really competing for the same job.

Trex: the capped composite most people picture

When most homeowners say “composite”, Trex is what they have in mind. Its mainstream lines are capped composite, offered in three collections that step up from one to the next: Select, Enhance and Transcend. Moving up buys you a deeper cap, richer colour variation and a more convincing wood grain.

Trex does what capped composite does well. It resists rot and termites, it does not need staining or sealing, and a good cap holds its colour in strong sun far better than any stained softwood. We install it with hidden fastener systems, so the surface reads as clean boards with no screw heads.

Where it is less comfortable is heat. Standard composite with a wood fibre core warms up in open sun roughly the way wood does, and dark colours make that worse. On a covered deck or one that gets afternoon shade, that barely matters. On a west facing deck with no cover, it is worth thinking about colour carefully. Our Trex deck builder page covers the collections and colours in more detail.

TimberTech and AZEK: one company, two different boards

This is the part that confuses almost everybody, including a few salespeople.

TimberTech and AZEK are made by the same company. TimberTech is the name on its capped composite boards, which compete directly with Trex. AZEK is the name on its PVC boards, and you will often see the two sold together as TimberTech AZEK. So “TimberTech or AZEK” is really “composite or PVC from the same manufacturer”.

The TimberTech composite lines behave much like Trex: a capped wood fibre core, rot and termite resistant, easy to live with, and at their best on a deck that is not baking in full sun all day.

AZEK is different in kind. With no wood filler inside, the boards are lighter than comparable composite, and that missing wood content is a large part of why they run cooler underfoot. TimberTech AZEK boards also carry a lifetime limited product warranty together with a 50-year limited fade and stain warranty, which is the strongest cover of any decking line we install. You can read more on our AZEK deck page and our TimberTech page.

MoistureShield: built for the deck that sits close to the ground

MoistureShield solves a problem the other brands mostly design around.

Most capped composite relies on the cap to keep water out of the core. That works well as long as the cap is intact. Cut an end, notch a board around a post or scuff through the cap with a chair leg, and the core underneath is exposed. MoistureShield’s core is built to resist water even when that happens, and its boards are approved for ground contact.

That matters more in Florida than almost anywhere. A lot of decks here sit low, close to sandy soil that stays damp, with very little air moving underneath. Those are the conditions that punish a board relying entirely on its cap. If your deck is low to grade, near irrigation or over ground that never really dries out, MoistureShield deserves a serious look. It also comes with a transferable 50-year limited residential structural warranty.

It is also worth being straight about heat. MoistureShield makes boards designed to run cooler than conventional composite, and they do. But cooler than conventional composite is not the same as cool. More on the MoistureShield decking page.

Heat: the Florida question every brand gets asked

Heat is the most common question we get, and the honest answer has three parts.

First, material. PVC with no wood fibre inside runs cooler than capped composite in the same sun.

Second, colour, which matters almost as much as the material. A light grey or tan board stays noticeably cooler than a dark espresso brown in any brand. If you are choosing between a dark composite and a light one, that decision can outweigh the brand decision entirely.

Third, the ceiling. No board deck is truly cool barefoot at two in the afternoon in July on an uncovered, west facing deck. The deck that stays comfortable is usually a light coloured board plus some shade, whether that is a pergola, a tree or the house itself. If barefoot comfort is your first priority, tell us early, because it changes what we recommend.

Salt air, sprinklers and the coast

Close to the water, the boards are usually the least of your worries. Salt settles on everything and works on anything metal, so the fasteners and connectors matter more than the brand of board sitting on top of them. On coastal builds we specify stainless hardware for exactly that reason.

Sprinklers are the inland version of the same problem. A deck edge that gets hit by irrigation every morning never fully dries, and hard water leaves mineral spotting on any surface. Redirecting a sprinkler head costs almost nothing and does more for the look of a deck than any upgrade in board line.

Movement, fastening and what goes under the boards

All of these boards expand and contract with temperature, and PVC moves more than wood fibre composite does. That is not a flaw, but it means gapping, end joints and fastening have to follow the manufacturer’s instructions exactly. A deck fastened as though the boards were static will show it in its first summer, with gaps opening unevenly or boards pushing against each other.

And none of these brands changes what actually holds a deck up. In a Florida storm, the deck survives or fails on its framing, its footings and the metal connectors tying it together, built to the wind rating your area requires. The warranty on the boards covers the boards. It does not cover the frame underneath them, and a premium surface on a weak frame is still a weak deck.

So which one should you pick?

Start with where the deck is and how you will use it, then let that point to a category.

• Full sun, and you want to walk it barefoot: solid PVC, in a light colour. That usually means AZEK.
• Covered or partly shaded deck: capped composite is the sensible call, and Trex or TimberTech composite will both serve you well.
• Low deck, close to damp ground or irrigation: MoistureShield, for its ground contact rating and its moisture resistant core.
• Longest warranty you can get: TimberTech AZEK, on the lines we install.

Most decks we build end up in the second or third group, and plenty of homeowners find that the colour they pick matters more to how the deck feels than the logo on the box.

Frequently asked questions