Now days in the waterproof engineering construction works,many kinds of waterproof materials are used, such as modified asphalt APP or SBS waterproof membrane, polymer cementitious waterproof coating, acrylic waterproof coating, silicone waterproof coating and so on. So in the waterproof engineering works, which is better? What are the advantages and disadvantages of waterproof membrane and waterproof coating?
In General
First of all, let’s understand what the coiled or membrane waterproof material and waterproof coatings are: waterproof bitumen membrane materials are mainly used in building walls, roofs, tunnels, highways, garbage landfills and other places to resist external rain and groundwater leakage, which can be curled into flexible building materials products; Waterproof coatings are the general term for materials that form tough waterproof membrane on the base surface after spreading, evaporation of solvent or evaporation of water vapor, or reaction curing. Due to the different material composition of waterproof coating and waterproof membrane, their characteristics, application scope, construction technology and application environment are different. The followings will bring you the advantages and disadvantages analysis of the waterproof membrane and waterproof coating.
Advantages of Waterproof Membrane and Waterproof Coating
Waterproof membrane
They are convenient for application in construction, short construction period needed, no need of maintenance after application, no affected by temperature, less environmental pollution, easy to master layer thickness according to design requirements, accurate material calculation, convenient construction site management, but not easy to cut corners, uniform layer thickness, can effectively overcome the stress of base course when empty laying.
Waterproof coating
They can be made into a continuous and integral waterproof layer; The application equipment is simple and the construction technology is easy to master, even by hand roller or brush application. The coating waterproof layer and the base course have a 100% bonding surface (except for cracks, nodes and other parts using the reinforcement layer empty paving method). Most of the water leakage of the coating waterproof layer within the service life is caused by the crack width of the base course, which is larger than the extensible range of the waterproof coating. The causes and parts of the water leakage are very easy to find and be fixed. The warranty is very convenient, as long as a small amount of waterproof materials are used to repair the cracks and damaged parts. High quality waterproof coating can achieve success in the back water surface waterproof. Some waterproof coatings can be applied on wet base and form waterproof layer.
Disadvantages of Waterproof Membrane and Waterproof Coating
Waterproofing membrane
They need to be cut according to the shape of the waterproof base. For the base with complex shape, it needs several pieces of splicing, so it is difficult to bond the overlapping parts of the waterproofing membrane; Complete sealing will become the main problem, and the hidden danger of water leakage is large; The protection of waterproofing membrane after construction and maintenance after leakage are also difficult problems. If there is only one penetrating damage, degumming and leakage of any part, the waterproof function of the whole coherent layer will all be lost. If the damaged and defective parts cannot be found, it is impossible to repair them locally, so you have to reapplied the waterproofing.
Waterproof coating
The waterproof coatings need a certain time of physical and chemical reaction to form a waterproof layer; Some waterproof coatings produce harmful gas and odor during curing, which is harmful to human body. Some waterproof coatings need to finish a waterproof layer for many times, and each time should have a certain interval, so the completion of waterproof layer takes a long time; In the construction process of waterproof coating, the site management is very important. There will be opportunities for shoddy work and shoddy manufacture in the case of management negligence; The thickness of waterproof coating layer is determined by the coating times during construction. In addition to the coating times, the solid content of coating itself is the decisive factor of film thickness.
The above is the comparison between waterproofing membrane and waterproofing coating brought by many outstanding people. In waterproofing engineering, waterproofing membrane and waterproofing coating are not good or bad. According to the parts that need waterproofing, we should fully consider the characteristics, advantages and application scope of waterproofing membrane and waterproofing coating, and choose the most suitable waterproofing material to achieve the best waterproofing effect. The most suitable is the best!
Post time: Jul-01-2021