Does composite decking need maintenance?
It's true that many composite decking options require very little maintenance but they do need basic cleaning in order to keep them looking presentable No, you don't need to repaint or reseal composite decking, and it is very resistant to rot, however, it's a good idea to sweep them clean weekly in order to prevent the growth of mold and lichen.
Is composite decking slippery when wet?
Composite decks are not slippery even when there is water on the surface. The problem, however, is when there is an accumulation of both ice and water on your composite decking. Aside from being the cause of accidents, ice, and the removal of it, can cause some damage to your patio. Non-anti slippery composite decking.
Is composite wood waterproof?
Composite decking does not absorb water. When moisture gets trapped under the decking and on top of the wood joists, it stays there and keeps it from drying properly. Homeowners who are looking for waterproof composite decking materials should look for those that have special features.
Why is composite wood so expensive?
Most composite decks are manufactured from the by-products of wood such as wood chips, sawdust, and recycled plastic materials.
This unique combination makes composite decks expensive than other types of decking material.
How much does composite wood cost?
Averaging between $3.50 and $6.00 per linear foot, the cost of installing a high-quality composite deck will certainly be higher than building with traditional pressure treated lumber, which can cost between $5.00 - $7.00 per (8') board.
What are the disadvantages of composite decking?
A pricey alternative to wood. Durability comes at a cost, as composite decking is more expensive than wood.
Composites aren't natural.
Composite decks aren't completely maintenance free.
You'll need to comparison shop.
Cons of Composite Decking
What are the problems with composite decking?
One of the most common complaints about composite decking is mold. Decking that is in shaded area or areas that tend to get wet frequently have been shown to grow mold and stain the deck. This is not restricted to composite decking. Wood decking can grow mold, mildew and algae.
How long do Composite decks last?
Composite decking can last over 20 years with the proper care and maintenance. Composite holds up better under hot or cold weather shifts. Composite is resistant to rot, mold, and termites, which can take their toll on wood decking materials. Composite does not require as much upkeep as wood.
20 years
  • Why is composite wood so expensive?
  • How much does composite wood cost?
  • What are the disadvantages of composite decking? Cons of Composite Decking
  • What are the problems with composite decking?
  • How long do Composite decks last? 20 years
One of the most crucial steps in building a deck is preparing a suitable foundation. […]

One of the most crucial steps in building a deck is preparing a suitable foundation. […]

One of the most crucial steps in building a deck is preparing a suitable foundation. Without it, the deck will encounter many problems. Not having an excellent foundation can make your deck unstable, unsafe, and most importantly, it can damage the integrity of the deck. The deck won’t also last as long as it should. If you plan to build a composite deck, you’ll have to prepare the ground. But the question is, how can you do it? Here are some tips and guides on how to do it. 

Preparing the Dirt 

One way to build a composite deck is to lay it directly on the ground. However, before you can do it, there are some preparations you need to do. Despite being a superior material, the dirt and grass can present problems for your composite decking later on. Some issues you may encounter are mould, insects, and moisture-related damages. So if you need to build a deck on ground-level dirt, how should you prepare? Here are some instructions that you can follow. 

  1. First, measure the ground according to the measurements of your planned composite decking. You can use some stakes, strings, and paint to mark the location.
  2. Next, remove any plants, rocks, and other debris on the installation area. If necessary, you can use a weed killer to remove any grass and weeds in the area. 
  3. After clearing the ground, dig entire area around 50 mm deep. Make sure to uproot any leftover weed or grass and remove rocks and stones.
  4. After digging, you will need to make sure that the area is level. You can use a piece of a wooden board and a spirit level to check it. You may need to dig more soil, to flatten the area. 
  5. Next, you will have to cover the area with landscaping fabric. It will prevent the growth of grass and weed, which can be damaging to your deck. 
  6. For the next step, you will need to consider how you’ll want to build your deck. One of the options is to lay the composite decking on top of the ground. For this, you will need to fill the area with gravel. Once filled, you will need to make sure that the installation area is still level. You can use a hand tamper to make the surface flat.
  7. Another option is to use concrete slabs instead of gravel. All you will need to do is place the concrete slabs according to the plans of the deck frame. It’s a better choice if you want your deck to be elevated. 
  8. Lastly, proceed to install your decking boards according to the manufacturers’ instructions. 

Preparing a Concrete Slab

how to prepare the ground for composite deck

Another common foundation for composite decking is a concrete slab. Many people have it and are considering adding a deck. While it does make a good foundation, there are still some preparations that you need to do for it to be a suitable ground for your composite decking. Here are the steps that you can follow.

  1. First, you will need to make sure that the concrete slab is in excellent condition. Poorly made concrete slabs tend to sink, along with anything you install on top of it. For this reason, you have to inspect the concrete for cracks and water problems. 
  2. For water-related problems, you will need to use a self-levelling compound. Alternatively, you can use a concrete topping mix, but it usually takes more time. These fixes can also make your concrete to be level. If you find it hard to level your concrete slab, you can also use adjustable pedestals. 
  3. Lastly, pre-drill the screws that you will use for the sleeper system. Most experts recommend that the screws you should use must penetrate at least 1 inch deep into the concrete. When pre-drilling, you’ll also want to drill 1/4 to 1/2 inch deeper than the screws can reach.
  4. Lastly, install the sleeper system and lay down the composite decking boards. 

Read full article on Ultra decking

Not All Synthetic Decking Is "Composite".
Not All Building Codes Allow Composite Decking.
Composite Lumber Is Not Just Decking.
Composite Lumber Can Be Expensive.
Higher-Quality Products Look More Like Wood.
Composites Can Be Slippery When Wet.