When a façade face or back wall are not built upon a monolithic masonry support the two components may flex and create a void. This can be very dangerous regardless of whether its on the floor, sides, or top of a fireplace opening. When there are cracks or voids on bottom or sides embers could find there way to concealed combustibles. When cracks or voids are on the top draft can draw smoke, heat, or even sparks up into the wall cavity where concealed combustibles may be present. We provide the services to investigate what the cause is and provide an appropriate repair.