...Anyone who designs, builds, manages, maintains, lives in, or inspects brick, concrete, or masonry structures. Avongard Crack Monitors are used by architects, engineers, builders, home inspectors, government agencies, home owners' associations, and lawyers. The fastest growing use of the Crack Monitor is in pre-construction surveys which insurance companies require before tunneling or excavation can begin. By installing gauges on all noticeable cracks in buildings next to your site, you can prove whether damage does or does not occur as a result of your project.