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composite decking

what best joists are used for composite decking?

Friday, March 25, 2022

One of the most durable and safest floors is composite decking. Composites are composite materials of recycled plastic and recycled wood. Not only is it durable, but it also retains the beauty of the wood. But now, homeowners are turning to composite materials for their decks. Now, let’s introduce the best joists needed to build the composite deck.

But to make your deck durable and safe, you need more than just sturdy materials. The process of building a floor, from foundation to finish, is critical. Planning the construction process is just as important as the materials you will use. So what’s the first thing you do when you create a deck?

Joist frame

One of the first processes in deck building is laying a good foundation. Compared to other deck materials, you don’t have to do a lot of work for the foundation when using composite materials. You just need to create a solid joist frame as a foundation or deck support. You don’t need to set up an elaborate foundation, or set up a concrete foundation for your decking construction.

outdoor decking frame | composite joist

Yes, WPC decking requires simpler foundations than others. However, that doesn’t mean you’ll settle for the average. Remember, your decor depends on these frames. Failure to pay attention to these details can lead to undesirable consequences.

What are the best joists for composite decking?

There are many things you should consider when choosing joists for your WPC decking boards. Trim frames, including trim joists, are the backbone of the floor structure. To get the most out of your floor, you need to create the best foundation possible. To do this, you need to find the best joists to use.

You can build decorative frames from different materials. A common type of material used for joists is wood, especially in residential settings. Pine, oak, and cedar are the most commonly used wood types for deck framing. In addition to wood, you can also use WPC material for the frame.

Composite joist has the same advantages as composite decking. It has excellent waterproof, mildew-proof, and rot-proof functions. At the same time, the composite joist also has the advantages of durability and long service life. Compared with pressure-treated wood, composite decking can provide you with more convenience.

Therefore, when you use the composite deck to build your outdoor living space. We also suggest that you use composite joists to build deck frames for outdoor decks.

How to use joists to build deck frames?

The height of the frame from the ground

When choosing the material to use, you should also consider how high your deck is off the ground. For subfloors and patios, you need to protect your frame from moisture and rot.

Therefore, if you choose pressure-treated wood, you must do a good job in moisture-proof and corrosion-resistant treatment. Avoid serious safety problems of the outdoor deck caused by the decay of the deck frame. Therefore, it is best to use composite joists.

Joist Spacing

Another thing to pay attention to when installing joists is joists’ spacing. It is the distance from the center of one joist to the center of the other. Even if you have the best materials, if you don’t set a proper space between the beams, the result won’t be pretty.

For spacing, the standard for residential areas is 16 inches. While commercial decks typically require 12 inches due to safety regulations. Some do 24″ spacing. The more space between the joists, the weaker the planks are. So if you want a sturdy deck, choose a shorter joist spacing.

However, it is best to follow the guidelines provided by the manufacturer or supplier. In addition to this, you will also need to follow the building standards of your country.

Joist thickness

The thickness of the joists can also affect your deck construction results. Like spacing, joist thickness will determine the overall capacity of the floor. Thicker and stronger beams translate into stronger decks.


No matter what kind of material is used for the outdoor deck. A strong and durable deck frame is very important. A good deck frame can make your outdoor deck last longer. So that you don’t have to worry about the safety of your family.

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