Bluewind Vermiculite Light-weight Insulating Bricks are suitable for installing in Indoor fireplaces. With high thermal resistance and low thermal conductivity these bricks are ideal for keeping desired temperatures. These bricks are light in weight and so they are easy to install and have low load bearing on structure making them applicable for many fireplace designs. Our bricks will solve your problem whether you wish to rebuild your existing fireplace or construct a new one, they will improve the performance and design.