Does Trex decking get hot on a sunny day? Top. Like many other outdoor surfaces, such as concrete, asphalt, beach sand, wood decking, other brands of composite decking, etc., Trex decking can get hot due to weather and sun exposure.

How do you keep Trex decking cool?

If you're choosing plastic and composite decking materials, opt for light and cool shades. It will significantly reduce the temperature during hot seasons. Of course, it also applies to the outside furniture. If you have couches, chairs, and pillows, consider changing their covers to a lighter one.

Why is Trex decking so hot?

Meaning that regardless if your decking is wood or composite, it will be hot in the sun. This is mostly to do with the science of heat and reflection. Decking is a flat surface reflecting the sun's heat more than cool grass in your yard. Making the decking hotter in the sun than elsewhere in your yard.