Fire Stop Systems, LLC. staff possess a wide-range of skills and experience, from the estimating professionals and office sta ... ff to the specialized field personnel. For each project, needs are determined based on the architect’s specifications, past experiences, and the customer’s budget. FSS uses its trained personnel and technologies to fulfill the requirements of any project, large or small. FSS makes every attempt to provide the best service and product at the best price, often using value engineering, whenever possible. Our Mission: To provide the most efficient service possible, giving the utmost care to the professional installation of quality fireproofing products including spray thermal/acoustical insulations, architectural expansion joint barrier and covers, perimeter/glass curtain wall fire-safing and penetration fire barrier. read more