What do you put under composite decking?

However, you will need a good base for the composite decking. Many use concrete flooring and concrete slabs for an even and stable base. Some also use adjustable pedestals. Using pressure-treated wood or composites will make a strong and durable frame.

Can you put Trex over wood?





In short, yes you can. You are more than capable of placing composite deck boards over existing wooden ones in order to save time and money from building an entirely new frame.

How do you treat wood under a deck?

Quote from the video:
Quote from Youtube video: It's time to stain. You should plan to clean and treat your wood deck when the weather forecast calls for 3 rain-free days in a row and temperatures between 50 and 90 degrees Fahrenheit.

What do you put between decking and joists?

With a quality butyl tape, you can add years to your deck’s usefulness. Use it as a sealer for the tops of your deck joists, rim joists, beams, and ledger boards. The tape is applied directly to the top edge of the wood. The builder must do this during construction or when replacing the deck boards.

How do you prepare the ground for a composite deck?

Preparing the Dirt

  1. First, measure the ground according to the measurements of your planned composite decking. …
  2. Next, remove any plants, rocks, and other debris in the installation area. …
  3. After clearing the ground, dig the entire area around 50 mm deep. …
  4. After digging, you will need to make sure that the area is level.

Can you lay Trex on the ground?





In fact, it can actually be installed on the ground, in the ground or underwater. Other alternative decking materials, including some composite and PVC decking, are susceptible to moisture.

How do you attach composite decking to wood?

Quote from the video:
Quote from Youtube video: Set your first board down and push the groove over the clip prongs. Next on every joist insert the clip prongs into the board's groove and secure with screws.

Can I put composite decking over plywood?

You can put deck boards over plywood. After setting in place your floor joists, install your plywood decking as the base and follow up with composite decking over the plywood.

Is a Trex deck worth it?

Trex decks are worth it because you get what you pay for. They cost more than a treated lumber one, making up for your extra outlay of cash at the onset, and will last for years longer than the average treated deck, letting you more than recoup your investment. Trex decks are also low maintenance.

How do you waterproof under a deck?



Installing a deck drainage system during construction is the best way to waterproof under your entire deck. A deck drainage system diverts water away from the joists and beams. An over-the-joist deck drainage system such as Trex RainEscape provides 100% protection from the damage caused by wood repeatedly getting wet.

How do I protect my decking subframe?

Purchase a water-resistant sealant designed for decks. Before installing the joists, coat each one, making sure to apply an extra coat to the ends. While this method will provide more protection than tapes that only cover the top of the joist, keep in mind that it will take significantly longer to treat each joist.

Should deck joists be sealed?

Seal the Joist with a Water Repellant Sealer



Sealing joist with a water repellant sealer will increase resistance to rot. As moisture is repelled from the wood inhibiting rot with low moisture content. Wood needs to have a moisture content above 18% for fungi to grow.

Can composite decking touch ground?



Composite lumber is highly resistant to rot and impervious to insects so is an acceptable choice ground contact.

Can I lay composite decking on soil?

You can either build it directly on the ground or square the site and build it on top of risers as a floating deck. If you lay it directly on the ground, you may find that it’s more susceptible to absorbing moisture and might need additional maintenance.

Does Trex decking float?

Because plastic decking is lighter per cubic inch than wood, it will float easily. There are no micro-spaces for the water to seep into, which means that the material will float indefinitely.

Can underside of Trex get wet?

The underside of the decking is uncapped and unprotected. Making it the soft underbelly which water can penetrate. To prevent damage, it is best to install Trex’s decking and any decking that is not entirely capped with a minimum of 6″ (150mm) clearance from water and dirt.

Does Trex decking absorb water?



Composite decking does not absorb water. Moisture that gets trapped under the decking and on top of the wood joists would tend to stay there and keep the joist from drying properly.

What is the difference between composite decking and Trex decking?

Composite decking does not splinter or crack and does not become as slippery as solid plastic in winter months. Trex composite decking products are infused with stain-resistant, fade-resistant color throughout the entire board to minimize the look of any surface scratches, giving uniform color all the way through.

What are the disadvantages of Trex decking?

CONS OF COMPOSITE DECKING

  • The cost of composite decking boards can be higher initially. …
  • Surface damage can be an issue in some cases. …
  • Composite deck surfaces can be more slippery. …
  • The surface of composite decking may be warmer than wood planks. …
  • If you prefer the look of real wood, composite isn’t for you.


How long will Trex decking last?



25 to 30 years

Trex and TimberTech Composite Decking Warranties



Composite decks have a lifespan of at least 25 to 30 years — and they have warranties to match.