PUB·F type polyurethane rigid foam waterproof and thermal insulation integrated board roofing technology system

PUB·F type polyurethane rigid foam waterproof and thermal insulation integrated board roofing technology system analysis

1. Technical principles and core advantages

Material properties

The PUB•F integrated board uses polyurethane rigid foam as the core material. Its thermal conductivity is ≤0.024 W/(m·K), the compressive strength is ≥0.20 MPa, the closed cell rate is as high as over 95%, and the water absorption rate is ≤1%. This structure gives the material excellent thermal insulation and waterproof properties, while also being lightweight (the weight of a 40mm thick plate is about 2.4kg/㎡), high strength, and corrosion resistance.

Functional integration

Waterproof layer: The closed-cell structure of polyurethane hard foam forms a continuous and seamless waterproof layer, which effectively prevents moisture penetration and has better water resistance than traditional membrane waterproofing.

Insulation layer: Low thermal conductivity ensures energy saving effect. Construction thickness ≥40mm can meet the energy saving requirement of 65%.

Buffer layer: Flexibility can absorb the cracking stress of the base layer, reduce damage to the waterproof layer, and extend the life of the system.

System Advantages

Efficient construction: on-site spraying or modular installation, the construction period is shortened by more than 50%, and the construction area can reach 1,000 square meters in a single day.

Reliable quality: The system structure is simplified, the risk of process connection is reduced, and the quality assurance coefficient is high.

Excellent economics: The comprehensive cost is reasonable, and the amortization cost is lower than the traditional waterproof + thermal insulation combination (5-6.6 yuan/㎡ vs. 13-23 yuan/㎡ per year).

Environmental protection and energy saving: fluorine-free foaming technology complies with green building standards and helps reach carbon peak targets.

2. Technical performance and standard basis

Physical performance requirements

Project Performance Index Test Method

Apparent density ≥35 kg/m³ GB/T 6343-2009

Thermal conductivity ≤0.024 W/(m·K) GB/T 10294-2008

Compressive strength ≥0.20 MPa GB/T 8813-2008

Dimensional stability ≤1.0% (70℃, 48h) GB/T 8811-2008

Closed cell rate ≥95% GB/T 10799-2008

Water absorption ≤1.0% (volume fraction) GB/T 8810-2005

Bonding strength ≥0.15 MPa 'Technical Regulations for External Wall Insulation'

Durability

The service life is more than 25 years, the maintenance cost is low, and local leakage points are easy to repair.

Adaptable to extreme climates from -50℃ to +150℃, resistant to weak acid and weak alkali corrosion.

Fire performance

The combustion performance is not lower than B1 level (GB 8624-2012), it is self-extinguishing when removed from the fire, and the carbonization layer blocks the entry of air.

3. Application Scenarios and Engineering Practice

Scope of application

Flat roofs, sloped roofs, special-shaped roofs (such as curved surfaces, roofs with complex structures).

Waterproofing and insulation of new buildings, repair and renovation of old roofs (no need to remove the original base layer).

Scenarios with high energy saving requirements such as industrial plants, cold storage, and data centers.

Typical cases

Yangshengtang Biomedical Base: Using 25mm thick PUB·F board, the system thermal calculation shows that the thermal conductivity coefficient is 0.024 W/(m·K) after correction, and the thermal resistance value is 1.03 (m²·K)/W, which meets the energy saving requirements.

Jinwan International Villa Group: In the application of slope roofs, spraying construction is suitable for complex nodes, and the leakage repair rate is reduced by 91%.

Beijing Winter Olympics Snowmobile and Sled Center: Sprayed polyurethane technology ensures constant track temperature, snow does not melt, and construction accuracy reaches millimeter level.

Key points of construction technology

Base layer treatment: clean up floating dust and oil stains, repair hollows, and ensure smoothness ≤10mm.

Spraying construction: Spray in layers to the designed thickness (each pass ≤15mm), with the muzzle distance from the base surface 500-700mm.

Node treatment: The drain outlet and the root of the pipe are sealed with waterproof sealant, and the flooded parts are reinforced with alkali-resistant mesh cloth.

Protective layer: Avoid stepping on it within 24 hours after spraying. 40-60mm fine stone concrete can be poured on the roof.