Table of Contents
What causes composite decking warp?
Warping occurs when the decking’s surface is exposed to sunlight. The decking becomes hot and starts to distort gradually. It happens during thermal expansion when the decking absorbs heat from the sun and expands. The heat from the sun causes the decking to be flexible.
Should composite decking warp?
Your composite deck may not warp, but it can sag and buckle. Most sagging is caused by improper spacing between the joists when it is installed. Composite decking is fade resistant, but it may fade over time in strong sunlight.
How do you fix a warped deck board?
Just like warping, bowing occurs when moisture leaves the boards causing the wood to shrink. By adding moisture back into the wood, you can correct the warping with a little bit of pressure. Add water to the board until it starts to pool. Leave it sitting on the surface for roughly 15 minutes before wiping it away.
Why is my composite deck wavy?
Flatten Joists to Avoid a Wavy Deck Most PVC and composite products aren’t as rigid as wood, so they don’t bridge imperfections in the framing as well. If some of your joists are higher than others, you might end up with a wavy surface.
Can composite decking bow?
Warping & Shrinking Some composite decking won’t move a bit and others have been found to shrink, swell, warp, twist, bow, and any other word you want to use in amounts unheard of, even with wood.
Does composite decking expand in heat?
As temperatures fluctuate, composite deck boards will naturally experience thermal expansion and contraction. That’s why the board ends should never be installed tight against one another. Then, install a fastener in the middle of each board length to prevent shifting during thermal expansion and contraction.
How many years does composite decking last?
Composite decking requires minimal upkeep and can last between 25 and 30 years. On average, plastic decking has a similar lifespan to composite decking and can last nearly 30 years.
What are the problems with composite decking?
Common complaints from homeowners include their composite decking board swelling, shifting, warping, and shrinking. The cause of this isn’t exactly clear, but it’s suggested that the composite nature of the decking leads it to be much more sensitive to temperature and humidity swings as well as sun exposure.
Does composite decking fade in the sun?
Effects of sun on composite decking Continued exposure to the elements can naturally lead to a gradual discolouration, particularly in the event of continued exposure to extreme sun and heat. Despite this fact, the effects of sunlight are far more forgiving on composite decking than traditional wood.
Why is my decking warping?
Decking Board Warping The warping of the decking boards is due to the shrinking and expansion of the boards. The moisture that it absorbs causes the materials to expand. When it leaves the board, the boards revert to its original size. This movement is usually not an issue.
Why is my deck bowing?
When the external forces become too powerful for the wood, the wood will move, typically cupping upwards at the outside edges. Too much sun on the top, combined with too much moisture below.
Can you repair composite decking?
If the boards on your composite deck have chips or small cracks, you may be able to repair them by using a composite deck repair kit — depending on the materials and the manufacturer of your deck’s boards.
Do Trex decks warp?
Trex decking resists termites, won’t rot, warp, or splinter-and never needs staining or painting. What’s more, Trex decking is made from 95% recycled materials: That’s an eco-friendly decking choice you can feel great about.
Can I paint over composite decking?
Yes. Although composite decks are not designed to be painted, they can still accept a paint layer nicely. Clean the surface properly and allow it to dry. Sand the composite surface to be painted along the direction of the grain.
Does composite decking need expansion gaps?
IMPORTANT: Do not allow composite deck boards to meet at the ends. When installing in temperatures of: 15°C or above allow a 5mm gap for expansion. Between 10-15°C allow a 6mm gap for expansion.
Which way does composite decking expand?
Yes, composite decking materials do expand and contract in all directions, but not as much as real wood. Composites are resistant to moisture. Instead, they change in size due to temperature. It will expand when under a hot temperature, while it will contract in the cold.
Does composite decking shrink and swell?
Any composite decking will expand and contract, its really just a matter of how much it expands and contracts and at what temperatures. Quality composite decking should very very minimal shrinkage if manufactured correctly.
Is composite decking worth the money?
There is no doubt that composite decking material is more expensive than wood. However, it is valued for its striking resemblance to natural wood and efficiency making it an excellent choice for decking. It is easier to clean and maintain which makes it last long enough to transfer the same value to the next homeowner.
What is the longest composite deck board?
Composite deck boards are typically offered in 12-foot and 16-foot lengths. Some brands, like Trex, feature a 20-foot deck board length which can be specially ordered.
