Bitumen, also known as asphalt, is a sticky, black and highly viscous liquid or semi-solid form of petroleum. Thanks to its waterproofing qualities, it is widely used in construction. Bituminous membranes are perfect for waterproofing roofs, basements, below-ground structures, bridges and other structures.
Sika's unique 2 ply bitumen membrane system
A 2-ply bitumen membrane waterproofing system is a robust solution for protecting structures from water infiltration. Comprising two layers of modified bitumen, typically reinforced with polyester, this system provides enhanced durability and flexibility. The first layer is torch-applied post application of the primer, bonds directly to the substrate, creating a secure seal. The second layer is torch-applied or mechanically fastened over the first, ensuring redundancy and increased resistance to leaks. This dual-ply configuration with staggered joints enhances the overall integrity of the waterproofing, making it particularly effective in demanding environments. The system is popular for its ease of installation, longevity, and ability to withstand varying weather conditions, making it a preferred choice in construction projects.