

Hi, any one.
My house is relatively old, and the living room has a brick fireplace that burns wood. The ceiling above the fireplace is quite high, and the walls are also made of brick. I haven’t used the fireplace much. Now, I’m planning to seal it off and, if possible, install an electric decorative fireplace in its place. However, I’ve been struggling with a few concerns for a long time:
1. Once the fireplace is sealed from the top and bottom, if the interior isn’t filled, how can I prevent moisture buildup inside, which might cause the brick walls to develop mold? Since trapped moisture would be difficult to dissipate after sealing, what’s the best solution?
2. The area in front of the fireplace has a brick step, and I want to decorate it with natural stone (such as marble) to create a cleaner look. However, I’m worried that light-colored marble might strongly contrast with the yellowish brick walls. Since the brick wall is about 5 meters (two stories) high, making changes to it as a DIY project would be difficult. Do you have any good suggestions? For example, should I extend the marble finish up to the fireplace height?