A continuous barrier material that prevents water penetration in building assemblies, providing protection against moisture infiltration.

Waterproof Membrane is a continuous barrier material that prevents water penetration in building assemblies, providing protection against moisture infiltration through flexible or rigid sheet materials that create impermeable layers while accommodating structural movement and environmental conditions. This essential waterproofing component consists of synthetic materials, modified bitumen, or liquid-applied systems that form seamless barriers against water intrusion while maintaining durability under hydrostatic pressure, temperature variations, and structural stresses. Waterproof membranes are critical in building envelope systems where they prevent water damage, protect structural elements, maintain indoor air quality, and ensure building longevity, making them indispensable for foundations, roofs, plazas, and any application where complete water exclusion is necessary for building performance and occupant safety.

Waterproof membranes are utilized in various building applications and waterproofing systems including foundation waterproofing where they protect below-grade structures from groundwater infiltration and hydrostatic pressure, roof waterproofing where they provide primary water protection for flat and low-slope roofing systems, plaza deck waterproofing where they protect occupied spaces below exterior surfaces, bathroom and wet area waterproofing where they prevent water damage in shower areas and around plumbing fixtures, tunnel and underground construction where they resist groundwater intrusion, and specialty applications including swimming pools, water tanks, and bridge decks where complete water exclusion is essential for structural integrity and functionality. Each application requires specific membrane selection, installation methods, and performance characteristics based on exposure conditions and structural requirements.

The types and materials of waterproof membranes include self-adhering membranes that provide peel-and-stick installation convenience with reliable adhesion, torch-applied membranes that use heat activation for secure bonding to substrates, mechanically-attached membranes that use fasteners for installation on vertical surfaces, liquid-applied membranes that cure to form seamless, monolithic barriers, EPDM and TPO membranes that offer single-ply roofing solutions with excellent weather resistance, and specialty membranes including crystalline, bentonite, and composite systems for specific applications. Material selection depends on substrate type, exposure conditions, and performance requirements.

Fun Fact: The first synthetic waterproof membranes were developed in the 1960s using modified bitumen technology, and modern membranes can withstand hydrostatic pressure exceeding 200 feet of water head while remaining flexible at temperatures as low as -40°F.

• Bitumen Membrane
• Crack Isolation Membrane
• Peel-and-Stick Membrane