Wood fireplace mantels by Design The Space (sometimes referred to as fireplace mantel surrounds) are considered a combustible material and, therefore, fire hazard clearances need to be maintained since your safety needs to be a primary concern. It is your reponsibility to check with local building code officials and to insure your wood mantel installation meets any local building codes or ordinances. Local codes take precedence over any national code and in the absence of local codes, we suggest your installation clearances meet or exceed the National/Standard Building Codes or the National Fire Code.
National Standard Building Code Information
2114.3 Masonry Fireplaces 4114.3.10All combustible mantels and similar trim shall be kept at least 6 inches from the fireplace opening. Parts of the mantel assembly located along the sides of the fireplace opening which project more than 1 1/2 inches (38mm) from the face of the fireplace shall have additional clearance equal to the projection. Parts of the mantel assembly located above and projecting more than 1 1/2 inches (38mm) from the fireplace opening shall not be placed less than 12 inches (305mm) from the top of the fireplace opening.
2806 Fireplaces Factory Built 2806.1.2Factory built fireplaces shall be listed and shall be installed in accordance with the conditions of the listing. (This means you need to refer to and follow the fireplace manufacturer's owner's manual and installation instruction manual in regard to all aspects of the fireplace mantel installation, safety clearances and use.)
National Fire Code
The National Fire Code exists to protect homeowners, to avoid creating unsafe situations that can result in a fire burning your home and possibly causing the loss of life. The National Fire Code dictates that any combustible material (e.g., wood mantel or similar trim) must be at least six inches from the firebox opening and an additional inch of clearance is needed for every 1/8 inch the combustible material or trim protrudes.