Maintain fire-resistance ratings by properly sealing every pipe, cable, duct, and joint penetration through fire-rated walls and floors. Serving Denver, Aurora, Lakewood, Arvada, Westminster, Thornton, Centennial, Boulder, Littleton, Broomfield, Castle Rock, Parker, Golden, Englewood, and the surrounding Denver metro area within 100 miles.
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Fire-rated caulks, putty pads, wrap strips, and pillow systems
Seals pipe, cable, duct, and conduit penetrations through fire-rated assemblies
Code-compliant with IBC, ASTM E814, and UL 1479 standards
New construction and renovation/tenant improvement projects
Experienced with 3M, Hilti, STI, and other major systems
Avoids failed inspections and costly rework
A proven, methodical approach refined over 20+ years of professional installation.
We survey all penetrations through fire-rated walls, floors, and ceilings to identify each opening requiring firestopping and the appropriate system.
We select the correct UL-listed firestop system for each penetration type — pipe, cable, duct, mixed, or joint — based on the assembly's fire rating and the penetrating item.
Firestop materials are installed per the UL-listed system detail, ensuring proper fill depth, material compatibility, and annular space requirements.
We document each firestop installation with location, system number, and materials for inspection records, then coordinate with building inspectors.
Every pipe, cable, HVAC duct, and conduit that passes through a fire-rated wall, floor, or ceiling creates a potential pathway for fire and smoke to spread between building compartments. Firestopping and penetration sealing closes these openings with fire-rated materials — caulks, sealants, putty pads, wrap strips, pillow systems, and cast-in-place devices — to maintain the fire-resistance rating of the assembly. Sky Insulation provides professional firestopping services for commercial, multi-family, and institutional construction projects throughout Denver and the Front Range. Our crews are experienced with all major firestop systems and manufacturers, including 3M, Hilti, STI, and Specified Technologies. We install firestopping in both new construction and existing buildings during renovation and tenant improvement projects. Firestopping is one of the most frequently inspected items in Denver commercial construction, and improper installation results in failed inspections, costly rework, and construction delays. Sky Insulation's experienced crews understand the specific requirements for each penetration type and assembly, ensuring your project passes inspection the first time.
Every unsealed penetration compromises the fire-resistance rating of the entire assembly. Proper firestopping restores and maintains the required rating.
Our crews know exactly what Denver building inspectors look for, installing firestopping per UL-listed system details to pass inspection without rework.
Firestopping prevents fire and smoke from spreading between building compartments — protecting occupants and meeting IBC life safety requirements.
From single cables to large duct openings, we have the systems and experience to firestop any penetration type through any fire-rated assembly.
Firestopping seals penetrations (pipes, cables, ducts) through fire-rated walls, floors, and ceilings using UL-listed systems. Fireblocking prevents flame spread through concealed passages like wall stud cavities. Both are required by code but are different systems installed in different locations.
Common firestop materials include intumescent caulks, silicone sealants, putty pads, wrap strips, pillows, cast-in-place devices, and composite sheet systems. The specific material depends on the penetration type, assembly fire rating, and UL-listed system requirements.
Yes. The Denver Building Code (based on the IBC) requires firestopping at all penetrations through fire-rated walls, floors, and ceiling assemblies. Firestopping must be installed using UL-listed or FM-approved systems and is inspected during construction.
Yes. We install firestopping during renovation, tenant improvement, and retrofit projects. When new penetrations are cut through existing fire-rated assemblies, they must be properly firestopped per code.
Serving Denver, Aurora, Lakewood, Arvada, Westminster, Thornton, Centennial, Boulder, Littleton, Broomfield, Castle Rock, Parker, Golden, Englewood, and the surrounding Denver metro area within 100 miles.
Based in Denver, CO, we provide professional insulation, fireproofing, and waterproofing services to homeowners and businesses within a 100-mile radius.
+ Surrounding communities within the Denver Metro Area
