I don't know the brand of decking as we just bought the house and this is our first winter here. The composite material used in our deck makes loud cracking sounds, like a rifle shot, when the temp is below zero. This happens with no set frequency - sometimes twice an hour for a few hours, or maybe not at all for a whole day. What is causing this, and more importantly, is this affecting the soundness of the deck? What can we do to fix this? Thank you!