
Air barrier systems
Air barrier systems are used to control air movement through the building envelope, improving insulation performance and reducing energy loss. Products include fluid-applied membranes, peel-and-stick barrier systems, and vapor-permeable air barrier materials designed for exterior wall assemblies.

Waterproofing and sealant systems
Waterproofing and sealant systems provide critical protection against water intrusion. Contractors rely on high-performance sealants, primers, and coating systems for joints, penetrations, and exterior surfaces. These systems are commonly used around windows, siding transitions, curtain walls, and structural connections to maintain a watertight building envelope.

Firestopping materials
Firestopping materials are designed to seal penetrations and joints within fire-rated assemblies. These products help prevent the spread of fire, smoke, and toxic gases through walls and floors, ensuring buildings meet safety standards and building code requirements. Intumescent sealants, firestop caulks, and specialized fire-rated systems are available for a variety of construction applications.

Insulation and vapor barrier products
Insulation and vapor barrier products play a key role in energy efficiency and interior comfort. Materials such as rigid insulation boards, spray foam insulation, and polyethylene vapor barriers are used to control heat transfer and moisture movement within building assemblies. These systems support both thermal performance and long-term building durability.

Siding and roofing components
Siding and roofing components complete the exterior envelope of many buildings. JJB supplies materials used in metal roofing, exterior siding, flashing systems, and related components that protect structures from environmental exposure while delivering a clean, durable exterior finish.
Together, these systems form the foundation of modern building envelope construction and are used by contractors on projects ranging from residential homes to large-scale commercial developments.
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