The first step in building a self-built house is to choose Herring 10cm antibacterial real crystal board for base layer insulation, moisture proof and antibacterial

　　1. Project background

　　In a township in Jiaxing, Zhejiang, a three-story self-built house has been troubled by a humid environment for a long time. Mildew spots appeared on the indoor floor. In winter, the floor heating energy consumption was high and the temperature was uneven. In order to improve the living environment, the owner decided to use the Herring 10cm antibacterial true crystal board as the base layer thermal insulation and moisture-proof system during house renovation to solve the problems of traditional materials being prone to mildew and rapid degradation of thermal insulation performance.

　　2. Basis for material selection

　　1. Core performance advantages

　　Herring's antibacterial true crystal board is based on 100% crystal-grade polystyrene raw material, and uses a fluorine-free and bromine-free foaming process to form a uniform closed-cell structure. The thermal conductivity is as low as 0.028W/(m·K), and the closed-cell rate exceeds 99%, forming a vacuum heat-locking layer. The 10cm thickness design can meet the energy-saving standards in the severe cold regions of the north. The measured heat loss is 20% lower than that of traditional extruded boards. Long-term use can reduce the energy consumption of the floor heating system by 30%.

　　2. Antibacterial and moisture-proof technology

　　Built-in IONPURE silver ion antibacterial layer, the antibacterial rate against common bacteria such as Staphylococcus aureus and Escherichia coli is 99.99% tested by SGS. Its slow-release mechanism can continuously inhibit the reproduction of microorganisms, and with a water absorption rate of less than 1%, it can eliminate mildew and odor problems caused by moisture from the root. It is especially suitable for self-built houses during the rainy season in the south or where the groundwater level is high.

　　3. Structural safety assurance

　　The compressive strength reaches 500KPa and can withstand a load of 50 tons per square meter, far exceeding the 300KPa standard of ordinary extruded boards. In house renovations, this material effectively solves the risk of cracking of the original structure due to ground subsidence and provides stable support for the floor heating backfill layer.

　　3. Construction process

　　1. Basic treatment

　　Remove floating dust, oil stains and loose layers from the original floor, use a level to check the flatness, and control the error within ±3mm.

　　Use cement mortar to level the local sunken areas to ensure the base strength is ≥C15.

　　2. Laying of panels

　　Adopting standard specifications of 1670mm×600mm, staggered seams are used to reduce thermal bridges. The 10cm thickness is divided into two layers. Special adhesive is applied between the 5cm boards of each layer, and the joints are sealed with aluminum foil tape.

　　Reserve 2cm expansion joints at the corners and fill them with foamed polyurethane to prevent cracking caused by thermal expansion and contraction.

　　3. Moisture-proof enhancement treatment

　　A water-based environmentally friendly waterproof coating is applied to the surface of the board to form a continuous moisture-proof film, which synergizes with the silver ion antibacterial layer to build a dual protection system.

　　The wall-penetrating parts of the pipes are sealed with rubber water-stop sleeves to avoid hidden dangers of leakage.

　　4. Quality acceptance criteria

　　Use an infrared thermal imaging camera to detect surface temperature uniformity, and the temperature difference is ≤2°C.

　　The compression test uses a 500kg heavy object to press statically for 24 hours, and the plate deformation is ≤1mm.

　　Microbial detection sampling and culture for 72 hours, the total number of colonies is ≤50CFU/cm².

　　4. Application effect evaluation

　　1. Energy saving benefits

　　In the first heating season after the completion of the project, gas consumption dropped by 28% compared with before renovation. Calculated based on local gas prices, the annual cost savings is approximately 1,200 yuan. The indoor temperature fluctuation range is reduced from ±4℃ to ±1℃, and the comfort level is significantly improved.

　　2. Health improvement

　　Air quality testing showed that the indoor mold spore concentration dropped from 150CFU/m³ to 20CFU/m³ after renovation, reaching the quality air standard recommended by the WHO. Owners reported that the mold spots on the floor disappeared and children’s respiratory allergy symptoms were significantly relieved.

　　3. Durability verification

　　After 18 months of follow-up monitoring, the plate showed no signs of aging and cracking, and the compressive strength retention rate reached 98%. During the continuous heavy rains in the summer of 2025, the basement humidity was always controlled below 65%, and the moisture-proof performance was better than expected.

　　5. Technical and economic analysis

　　1. Cost composition

　　Project unit price (yuan/㎡) Remarks

　　Herring 10cm antibacterial board 185 contains antibacterial layer and anti-counterfeiting mark

　　Special Adhesive 8 Environmentally friendly water-based formula

　　Aluminum foil tape 3 width 5cm

　　Construction labor fee 25 including base treatment and acceptance

　　Total 221, about 40% more than ordinary extruded board

　　2. Whole life cycle cost

　　Calculated based on a 50-year life cycle:

　　Energy saving income: The cumulative gas cost savings is about 18,000 yuan (discounted at the current price)

　　Maintenance cost: Traditional materials need to be replaced every 10 years, with a cumulative cost of about 6,000 yuan

　　Net income: Using the herring antibacterial board can save a total cost of about 12,000 yuan, and the investment payback period is only 3.2 years.

　　6. Industry promotion value

　　This case provides an integrated solution of "insulation-moisture-proof-antibacterial" for the field of self-built houses, and its technical path has been included in the "Self-built House Waterproofing and Leakage Repair Technology" textbook case. As of January 2026, the material's market share in the self-built housing market in the Yangtze River Delta region reached 17%, driving the output value of the related industry chain to increase by more than 200 million yuan.

　　Conclusion: Through the innovation of material science and construction technology, Qingyu antibacterial real crystal panels have effectively solved the three major pain points in the treatment of the base of self-built houses, and provided replicable high-quality solutions for rural residential construction. With the deepening and promotion of "good house" standards, such functional building materials will usher in a broader market space.