Fire bricks absorb heat, providing a buffer between the fire and the firebox, maintaining a high temperature and preventing damage to the wall behind a fireplace. Here are the directions for individually applied fire brick.
Fireplace Blog Archives - VanderWall
How to Light Wood Fires Efficiently - Earthcore
Isokern Gas Fireplace - Photos & Ideas
How to Fix Damaged Fireplace Brick - This Old House
Fireplace Blog Archives - VanderWall
Outdoor Fireplace Showroom - Hearth & Home Specialties, Inc.
Isokern-Earthcore
Elite Hearth Solutions, LLC
Why Your Gas Fireplace Won't Light and How to Fix It
Warming Trends Inc.
10 Brick Fireplace Before and After Transformations (with Home Makeover Photos)
Isokern Bvetto B-Vent Fireplace - 36
Best 15 Custom Fireplace Contractors & Installers in Santa Barbara, CA
How to Fix Mortar Gaps in a Fireplace Firebox
Firebox Demo & Reconstruction Remodel