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 In addition, unless you want the wood to weather to a pale gray, youâll need to oil the deck every one to two years. 2  An ipe deck can cost $23-30 per square foot. 3  Composite-The old style of composite decking is a blend of wood fiber and plastic which has a brushed, matte surface. A capped composite deck can cost $20-28 per square foot. 2  Cedar or redwood-Cedar or redwood are good mid-range options in that they cost less than tropical hardwoods or composite, yet last 15 to 20 years.