Waterproofing stands as a core concern for global customers in the selection of light steel villas, as it directly impacts the buildings’ service life, living comfort, and long-term maintenance costs. A significant number of customers express concerns that light steel villas, characterized by their prefabricated and lightweight nature, are susceptible to water leakage, moisture accumulation, and structural corrosion—particularly in regions with heavy rainfall, high humidity, or harsh climatic conditions. As a professional manufacturer specializing in the R&D, production, and export of light steel villas, Hanliang has long focused on addressing the waterproof pain points that are paramount to customers. Leveraging years of industry experience and technical accumulation, Hanliang has developed a targeted special waterproof solution, which comprehensively covers waterproofing for roofs, walls, doors, windows, and foundations. This article elaborates on the core waterproof concerns of customers and Hanliang’s corresponding solutions, providing professional references for global customers and demonstrating the company’s technical strength and product reliability.
Through in-depth communication with customers across different regions, Hanliang has summarized four core waterproof concerns that are most prominent among customers, which also serve as key pain points hindering the promotion and application of light steel villas in the global market.
Firstly, roof water leakage. The roof is the most vulnerable component of light steel villas to water leakage. Many conventional light steel villas suffer from issues such as improper slope design, inadequate selection of waterproof materials, and poor node sealing, which lead to water seepage along roof seams, ridges, and eaves during heavy rainfall, resulting in damage to internal structures and decorations. Secondly, wall moisture and condensation. In high-humidity regions, moisture easily penetrates into wall cavities, causing condensation, mold growth, and even corrosion of steel structures—all of which compromise the living environment and service life of the villa. Thirdly, inadequate waterproofing of door, window, and pipe joints. Gaps between doors, windows, and walls, as well as joints of water and electrical pipes, are prone to becoming channels for water penetration if not properly treated, leading to local water leakage. Fourthly, high maintenance costs. In the event of water leakage in light steel villas, the maintenance process is complex and costly, and frequent maintenance further increases the long-term operational costs for customers.
To address the aforementioned customer concerns, Hanliang has developed a systematic waterproof solution covering the entire building, integrating design, materials, construction, and after-sales service. This solution fundamentally resolves the waterproof issues of light steel villas and provides customers with long-term, reliable protection.
The roof waterproof design of Hanliang light steel villas adheres to the principle of “drainage first, sealing auxiliary”, combining scientific structural design with high-quality waterproof materials to eliminate potential water leakage hazards. Firstly, the roof slope is scientifically designed based on local rainfall intensity: for regions with heavy rainfall, the slope is set at 20°-30°, while for wind-prone areas, the slope is controlled between 15°-25°, ensuring rapid rainwater discharge without accumulation. Secondly, the roof adopts a multi-layer composite waterproof structure: the outermost layer utilizes color stone metal tiles or asphalt tiles with excellent waterproof performance; the middle layer is paved with a 4mm-thick SBS modified asphalt waterproof membrane; and the inner layer is laid with a waterproof breathable membrane, forming a three-layer waterproof barrier. In addition, key nodes such as roof ridges, eaves, and skylights are reinforced with additional waterproof layers, with the lap length of waterproof materials not less than 100mm, sealed with weather-resistant sealant to prevent water seepage at joints. Simultaneously, a reasonable drainage system is configured, including gutters and downspouts, with downspout spacing not exceeding 12m and diameter not less than 110mm, ensuring unobstructed drainage during heavy rainfall.
To resolve issues of wall moisture and condensation, Hanliang adopts a “double-layer moisture-proof + breathable” design for the wall system. A high-quality waterproof breathable membrane is laid between the light steel keel and external wall panels; this membrane features a microporous structure that blocks external moisture from entering the wall while discharging internal moisture, achieving a balance between moisture resistance and breathability. The wall cavity is filled with centrifugal glass wool, which not only possesses excellent thermal insulation performance but also has a certain moisture absorption capacity, preventing moisture accumulation within the cavity. The external wall adopts waterproof metal carved panels with strong water resistance and weather resistance, and the joints between panels are sealed with special sealant to prevent water penetration. In addition, ventilation ports are installed at the bottom and top of the wall, with a spacing not exceeding 3m, forming air convection to further reduce wall moisture.
Door, window, and pipe joints are key locations prone to local water leakage. Hanliang implements targeted sealing measures to ensure zero leakage. For doors and windows, high-quality waterproof aluminum alloy profiles with built-in waterproof strips are adopted; the gap between the frame and the wall is filled with polyurethane foam and weather-resistant sealant, forming a double sealing effect to prevent rainwater from seeping into the room along the gap. For water and electrical pipe joints, waterproof sleeves and sealant are used for layered sealing, and a 48-hour water tightness test is conducted after construction to ensure no water leakage. Simultaneously, the external wall panels around the pipes are reinforced to avoid structural gaps caused by pipe vibration, fundamentally eliminating potential water leakage hazards.
The foundation serves as the source of building moisture, particularly in regions with high groundwater levels. Hanliang light steel villas adopt a multi-layer foundation waterproof design: first, a 2mm-thick PE waterproof membrane is laid on the foundation base to block groundwater penetration; subsequently, a layer of waterproof asphalt is applied to the foundation surface, and a waterproof membrane is added at the contact position of the light steel structure, forming a comprehensive moisture-proof barrier. For regions with severe groundwater issues, an elevated foundation is adopted to increase the foundation height, avoiding groundwater immersion and ensuring the dryness of the building interior. After the completion of foundation construction, a water tightness test is performed to ensure no moisture seepage before proceeding to the next construction phase.
Hanliang’s waterproof solution is not only systematic and targeted but also demonstrates distinct advantages in materials, construction, and after-sales service, fully meeting the waterproof needs of customers in different regions and climates. In terms of materials, Hanliang selects high-quality waterproof materials that comply with international standards, such as AZ150 aluminum-zinc plated steel, SBS modified asphalt waterproof membranes, and waterproof breathable membranes. These materials exhibit excellent durability and weather resistance, with the waterproof system’s service life reaching more than 15 years. In terms of construction, standardized prefabrication and on-site assembly processes are adopted, and all waterproof construction links are implemented in strict accordance with operational specifications, with professional technicians conducting on-site supervision to ensure construction quality. In terms of after-sales service, Hanliang provides a 5-year waterproof quality guarantee and a 50-year main structure quality guarantee, and has established a professional after-sales team to provide timely maintenance and repair services for customers, addressing customers’ concerns regarding long-term use.
Waterproofing is crucial to ensuring the quality and service life of light steel villas, and it remains a core concern for global customers. Hanliang’s special waterproof solution, featuring scientific design, high-quality materials, standardized construction, and comprehensive after-sales service, comprehensively addresses the waterproof pain points that customers care about, achieving “comprehensive protection, zero leakage, and low maintenance”. Whether in regions with heavy rainfall, high humidity, or harsh climates, Hanliang light steel villas can provide reliable waterproof protection, ensuring the building’s living comfort and long-term use value.
Hanliang will continue to focus on the waterproof needs of global customers, continuously optimizing and upgrading waterproof technologies and solutions. Adhering to the principle of “customer-oriented, quality first”, Hanliang will provide more high-quality and reliable light steel villa products and services for global customers, striving to become a trusted partner for customers in the light steel villa construction field.
Follow us
