>Product Introduction：
    Modified TH rigid foam polyurethane waterproof insulation system is a kind of innovative product with waterproof and insulation property. It is independently developed by the scientific research staff of Tonghua Company, combining advanced technology at home and abroad and after years of practical experience. After being evaluated by experts appointed by Construction Ministry, this product is deemed as the lead in the country regarding to its technological level.
    Modified TH rigid foam polyurethane waterproof insulation system is compounded by modified rigid foam polyurethane and compound mortar breakage-resistant protective layer. Use high-pressure foaming equipment to directly spray original foaming liquid A and B on the surface of any shape (plane, slant, non-conventional surface, etc.), then serial chemical reactions are conducted and rigid foam polyurethane is produced. After mixing compound mortar evenly in proportion, use scraping plate to directly apply them to the surface of rigid foam material, then the breakage-resistant protective layer is formed.

> Product Features：
Good Waterproof and Insulation Property
    This system modifies ordinary rigid foam polyurethane, making the modified rigid foam polyurethane have excellent insulation property and unique waterproof feature. It truly combines the properties of waterproof and insulation, finishing one-time during construction.
High Compressive-Pressure Strength
This system has very high strength, and some other extraordinary features such as anti-impact, anti-penetration and breakage-resistance.
Good Entirety
This system has no joins, making the construction simple and convenient. Whatever the base shape is, they can all be joined as a solid whole.
Excellent Energy-Saving Results
After being tested by many projects, by using this system, room temperature drops 4～5℃ in the summer and rises 4～5℃ during winter heating period.

> Construction Coverage
   Modified TH rigid foam polyurethane waterproof insulation system is mainly used in the waterproof and insulation of roofing of plane house, slant house and non-conventional house, and walls of industrial and civil buildings whose waterproof levels rangeⅠ～Ⅲ, and also
large-span metal grid structure roofing and other constructions needing waterproof. It is also suitable for the

insulation and damp proof of basement, insulation and waterproof of aqueduct side slop and banks, repair and reformation of old roofing, and road base insulation layer of railway and highways.

> Construction Techniques
1.Requirements to Base
(1)Base technical requirements should be in accordance with GB50207-94 “Roofing Engineering and Technical Regulations”.
(2) Base does not need isolation seam and moisture barrier.
2. How to choose the thickness of modified TH rigid foam polyurethane
(1) When roofing heat conduction factor k≤0.08, thickness of rigid foam polyurethane is 35mm.
(2) When roofing heat conduction factor k≤0.06, thickness of rigid foam polyurethane is 45mm.
(3) Rigid foam waterproof layer thickness of parts not requiring insulation (such as gable wall, parapet, and structure standing out of the roofing) should not be less than 20mm.
3.Construction of modified TH rigid foam polyurethane waterproof insulation system
(1)Construction site temperature should not be lower than 15℃, wind should not be stronger than the 4th degree. When the wind is stronger than the 4th degree, take wind-stopping actions or stop the construction.
(2)Use high-pressure foaming machine to spray A and B to the construction surface. Spray a few times, each time the spray thickness should be around between 10 to 15mm.
(3)Use scraping plate to apply compound protective layer raw material to the modified rigid foam surface. The shape is required to be formed after three times of scraping. The protective layer thickness should be around 5mm and the thinnest part should not be less than 3mm. The interval between each scraping should be longer than 24 hours.