But this has been exacerbated by human activities which have led to: 1) an increase in greenhouse gas emissions that causes heat to remain trapped within the troposphere, and 2) a decrease in ozone in the stratosphere, causing less sunlight to be absorbed by the ozone layer, resulting in a cooling of the stratosphere.
When measuring for floor tile the rule is: Length x Width + Waste = Amount Needed. Waste Factor will vary based upon tile size, layout, configuration of room, patterns, etc. Typical waste factor is about 10%. Add 15% for tile being installed diagonally or for a room with lots of jogs and corners.
Quick Answer. To tile a 1,200-square-foot floor, tilers need 534 18-inch tiles, 1,200 12-inch tiles, 2,134 9-inch tiles, 4,800 6-inch tiles or 11,020 4-inch tiles. These numbers include a 10 percent waste allowance to account for breakage and irregular cuts. Continue Reading.