When using a wood-burning fireplace, more heat can be lost up the chimney than is produced by the fire itself. To reduce heat loss when using your fireplace, follow these suggestions: 1) Lower the thermostat setting so your system doesn't keep trying to replace the warm air being drawn toward the chimney. 2) Open the window nearest the fireplace about one inch and close any doors in the room so the fireplace can't draw heated air out of the house. 3) Install glass fireplace doors to help keep the warm air in the room. 4) Close the chimney damper when the fireplace is not in use.
An easy way to estimate how much a stack of plywood will weigh is to figure about 25 lbs. per 1/4 in. of thickness. For example, one 4×8-ft. sheet of 1/4-in. plywood will weigh about 25 lbs., 1/2-in. about 50 lbs., and 3/4-in. about 75 lbs. This can help you decide how many trips you need to make to get a stack home, or whether you should have it delivered.