According to the National Institutes of Health and many other sources, the stress response is caused. by hormones. Hormones are chemicals, produced by glands and carried through the bloodstream, that. affect the activities of organs in the body.
Composite Decking Costs. 1  Average: $35 per square foot. 2  For polythylene-based composite decking, the average cost per square foot is $7.82. 3  For polypropylene-based decking, the average cost is $8.68 per square foot.
1 According to the annual Cost vs. Value report from Remodeling magazine, the national average cost for a new 16 x 20 foot wood deck is around $11,000, while a new composite deck of the same size costs $15,000 to $16,000.