There have been many ice ages during the last 2.6 million years but when people talk about the Ice Age, they are often referring to the most recent glacial period, which peaked about 21,000 years ago and ended about 11,500 years ago.
It costs roughly â¦ $11-$13 for the materials and contractors average about $5-$8 per square foot for labor, not including steps. For example, my company charges approximately $18 per square foot to build a deck.
Calculating the Cost of Building Your Deck. When calculating the cost of building a deck, you have to figure in more than just the wood. A deck made from inexpensive materials may not be cost-effective when you include construction and maintenance costs.