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.
Cost To Build A Deck. Calculate how much a deck costs in materials. Compare the costs for composite, cedar, redwood, exotic hardwoods and pressure treated materials. Enter the desired width and depth for your deck below and check out the costs of materials for a variety of our designs. Total Width.