There are several types of synthetic decking material available. Synthetic decks require a minimum of maintenance compared to wooden decks since the synthetic materials do not rot. One consideration when constructing these decks is thermal expansion which is greater in synthetic decks. As a result when constructing synthetic decks expansion gaps between the boards need to be used. Timbertech has a coefficient of linear expansion of 1.6 x 10-5 /°C whereas oak has a coefficient of linear expansion of 4.9 x 10-6/°C. How long will a board of Timbertech be at 37° C if it is 5 m when the temperature is -17° C? How about the length of an oak board in the same conditions. (These temperatures are about 0 to 100 degrees F.) About how much of a change in length in inches do you get for each?