Gas Fireplace

• A gas fireplace produces a large amount of heat, but most of it is focused either upward through vents or downward into the floor beneath the fireplace. These places are where heat is gathered by your fan system and blown out into the room. If your floors are in danger, it is probably because of the heat the fan system produces. Gas fireplaces have an advantage here over wood fireplaces, because they do not scatter sparks or coals on the floor.
  
  

Combustible Floors

• If you are installing a gas fireplace in an area where you have not had a fireplace before, prepare for some extra work. Typically floors in a house are combustible, or not designed to deal with a fireplace and the heat it produces. In order to install a gas fireplace you need to install a noncombustible floor made out of masonry -- brick, stone or concrete -- to protect both your subfloor and nearby walls.
  
  

Floor Damage in Front of the Fireplace

• The heat a gas fireplace produces is typically directed out: sometimes the heat can be directed at the flooring you use in front of the fireplace. If you have a plastic-based flooring like a laminate material or another type of flooring that could melt or crack under constant heat, consider using a hearth rug. These rugs provide an extra barrier between fireplace heat and fragile floors.
  
  

Solutions

• When creating your noncombustible floor and fireplace hearth, draw out the masonry you use for 1 to 2 feet in front of the fireplace. Not only is some extra masonry often required for gas fireplaces, using brickwork, tile or stone directly in front of your fireplace is one of the best ways to protect the surrounding floor from heat damage.