It is the combination hot air rising and subsequent vacuum effect in the room below which ensures that smoke from a fireplace fire will go up a chimney. without the control of the chimney flue, this effect could quickly lead to a fireplace fire getting too hot for the fireplace to handle.
oilcloth. (textiles). A fabric coated with a mixture of oil and clay, used as a waterproof covering. A floor covering made of a heavy fabric treated with oil paint.
It was a canvas covered with a though paint, just like canvas used for oil paintings, therefore its oilcloth name. It was then popular in France. Today's oilcloth, back in popularity, is a vinyl cloth that is bonded and supported with a backliner of cotton or polyester mesh. The surface can be wiped clean. The oilcloth fabric has been tested and passes the National Fire Protection Agency 701 classification for commercial and residential use. The oilcloth is a 10.3oz weight vinyl. Oilcloths is a waterproof and stain resistant cloth with colorful and nice designs, that are perfect for the daily use in the table.