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.
Contractor Costs. As of 2010, licensed building contractors in the United States are typically charging from $20 to $50 per square foot of decking installed. Therefore, expect to pay a contractor $4,000 to $10,000 for most 10 by 20-foot decks, materials included.aterial Costs. As of 2010, you may pay 70 cents per lineal foot for 2 by 6-inch pressure-treated pine to more than $5 per foot for 6-inch hardwood Most composite decking made with PVC plastic sells for $1 to $3 per foot.