Below-grade Foundation Membrane
Description
Technical Parameters
Underground foundation works form the base of buildings; once waterproofing fails, repair costs become exorbitant and structural safety of buildings is compromised. Therefore, selection of below-grade foundation membrane directly determines the waterproof service life of underground works. Our below-grade foundation membrane is specially developed for waterproof scenarios including basement base slabs, external walls and bearing platforms of underground foundations, taking SBS modified bitumen as the core substrate paired with long-fiber polyester mat reinforcing layers. It delivers integrated performance of high strength, high elongation, puncture resistance and anti-aging, capable of adapting to settlement deformation of underground foundations and long-term immersion in underground water. This below-grade foundation membrane adopts torch-on construction, with fused lap joints forming an integrated waterproof layer to fundamentally eliminate water channeling risks, making it the mainstream option for large-scale underground works. This below-grade foundation membrane has been deployed in hundreds of domestic basement projects, maintaining stable and reliable waterproof performance after over 10 years of maximum service life.
Multiple adapted models are launched to match distinct construction characteristics of different parts of underground works: conventional torch-on variants are suitable for external pre-paste construction of base slabs, self-adhesive variants for internal post-paste construction of external walls, and special reinforcing membranes and sealing materials are available for joint nodes including pile heads and internal/external corners. We specially add long-term water immersion resistant modified components into the formula to avoid significant attenuation of physical performance even after years of immersion in underground water. The substrate adopts high-strength long-fiber polyester felt with tensile strength exceeding 800N/50mm, capable of withstanding extrusion from backfill soil and tensile force from base settlement without easy fracture. For agents targeting overseas engineering markets, this product serves as the core category for underground waterproofing with mature technology and high market recognition. Paired with our joint auxiliary materials, it can deliver complete underground waterproof system solutions to boost project bidding success rates.
Specification Parameters
|
Parameter Item |
Index (4mm polyester mat torch-on variant example) |
|
Substrate Type |
Long-fiber polyester felt |
|
Thickness Specifications |
3mm / 4mm / 5mm |
|
Width |
1m |
|
Area per Roll |
10㎡ |
|
Tensile Strength (Lengthwise / Crosswise) |
≥800N/50mm |
|
Breaking Elongation |
≥40% |
|
Low-Temperature Flexibility |
No cracking at -25℃ |
Application Fields
√ Waterproofing of base slabs and external walls of basements
√ Waterproofing of bearing platforms and ground beams of building foundations
√ Waterproofing of underground pipe galleries and underground parking lots
√ Structural waterproofing of subway tunnels and civil air defense works
√ Waterproofing of underground water tanks and pump houses
√ Temporary waterproofing of foundation pit supports and slope revetments
Customization Capacity
We provide all-round customization services for below-grade foundation membrane, allowing adjustment of membrane thickness, substrate type and surface facing materials per project demands. Thickness covers the full range of 3mm to 5mm, with optional substrates including polyester mat, glass fiber mat and composite mat, and surface facings including PE film, fine sand and mineral granules. OEM/ODM private label production is supported, with packaging, shipping marks and brand identifiers fully customized to client requirements. If you have special performance demands such as superior low-temperature flexibility or enhanced corrosion resistance, our R&D team can adjust formulas targeted to deliver customized samples within one week. Flexible MOQ applies: 100㎡ for standard variants, 500㎡ for customized variants, with mixed loading of multiple models permitted to lower trial and inventory costs for you.
Factory Strength
As a professional waterproof building material manufacturer with 12 years of industry experience, our plant covers 16,000 ㎡ equipped with 3 automated modified bitumen membrane production lines delivering a monthly output of 500,000 ㎡ waterproof membranes, capable of easily meeting bulk supply demands for large-scale underground engineering projects. The factory features an independent R&D center and testing laboratory fully equipped with waterproof membrane performance testing devices, enabling full-process quality traceability from raw materials to finished goods. We maintain long-term strategic cooperation with Fortune Global 500 enterprises including China State Construction Group, China Railway Group and China Railway Construction Corporation, with products applied in numerous national key projects such as subways, high-speed railways and municipal pipe galleries. By partnering with us, you gain far more than product supply-you secure a solid backing with technical expertise, production capacity and verified project experience.
Payment Terms
We adopt flexible payment policies fully adapted to capital operation rhythms of overseas purchasers and agents. Standard finished product orders follow the settlement rule of 30% advance payment + 70% balance payment, with the balance payable against copy of bill of lading to guarantee transaction safety. Customized product orders adopt 50% advance payment + 50% balance payment, with full synchronization of production progress for fully controllable delivery schedules. US dollar telegraphic transfer settlement is supported, and letters of credit can be negotiated for long-term cooperative premium clients. Tiered unit price discounts apply for agents meeting annual purchase volume targets, with larger purchase volumes corresponding to lower unit prices alongside exclusive benefits including priority production scheduling and free sample delivery to empower you to continuously expand market share in local regions.
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