QCI Firestop, Serving Naples, Marco Island and SW Florida. Condominium Unit Alterations, Industrial, Commercial renovations and new builds. QCI is an industry leading Firestop Contractor with offices in Naples Florida and serving all of Southwest Florida. CGC-049710 Our Firestop system consists of a combination of materials installed to comply with local and national building codes. Our tested and approved systems comply with applicable requirements of the American Society for Testing and Materials (ASTM). E 84, E 119, E 136, E 814, E 1399, E 1966, E 2174, E 2393, E 2307