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.
Vinyl Tile. 1  Vinyl tiles generally come in 9- and 12-inch squares. 2  To find the number of 12-inch tiles you need, just multiply the length of the room by the width in feet (rounding fractions up to the next foot) to get the number of tiles you need. 3  Add 5 percent extra for cutting and waste.