As we know,the stability of Wood Plastic Composite decking board is very good.
Although in the extremely freezing cold weather,it can be harder and crispy because of the plastic in it,
but you don't need to worry about it,because the most lowest temperature that WPC can stand is -30℃!!
And in the high temperature,there will be slight expansion on WPC,so when you installing,some space should be saved between one board to another.