Question: I am installing a woodstove in my home. I need to know how far it should be from the walls. If I use brick as the hearth, how far does it need to extend from the woodstove for safety. How high does it need to go up the wall for safety. How thick must all be. What are the codes for the state of Maryland. Answer: This depends very much on the brand and model of the stove. If it is an older stove without a manual, then the "common" standards written by NFPA or some of the other code authorities will apply. As an example: 36" from wall-no protection 12" from wall with sheet metal spaced 1" from wall 16" on floor in front of stove loading door.