How to make the new house waterproof?

On the first floor, not only the wall should be moisture-proof, but also the ground should be properly moisture-proof. The ground floor (except bathroom and kitchen) and the wall surface (above 100cm high) are sealed with cement mortar and then coated with a single waterproof coating to prevent moisture. Construction method of applying cement-based waterproof coating in bathroom, balcony and kitchen. First, choose waterproof materials suitable for home decoration. It is suggested to choose polymer cement-based waterproof coating/slurry commonly used in home decoration, that is, the market names are: universal, flexible, K 1 1, JS, GS waterproof coating/slurry. These products are water-based coatings, which are non-toxic, harmless and pollution-free, simple and fast in construction, strong in adhesion to cement substrate, long in service life, strong in waterproof effect and moderate in price. Brands with good quality and good reputation, such as Leibangshi waterproof slurry and Gaode waterproof coating.

Second, the treated base surface (base material) should be waterproof. Treat the base surface to make it firm, flat and clean, free of dust, grease, wax and other sundries; If there are pores, cracks and unequal defects on the base surface, it must be repaired and smoothed with cement mortar in advance. It is suggested to stick plastic strips at the expansion joints and add a layer of non-woven fabric at the joints. It is recommended to use plugging king or nozzle grouting material for nozzle filling. The corner of the wall should be painted into a circular arc (or V-shape); Ensure that the base surface is fully wet, but there can be no Mingshui;

Third, pay attention to waterproof construction in place. Brush directly on the base surface with a brush or roller brush, with even force and no brush leakage; Generally, it needs to be brushed twice (depending on the use requirements), and the thickness of each brush shall not exceed1mm; After the previous one is slightly dry, brush the next one (it is not sticky, usually with an interval of 1-2 hours), and brush the front and back vertically and horizontally, with a total thickness of1-2 mm; If the coating has cured, wet it with water before applying another layer. It is important to note that the corner of the wall should be processed into an arc before painting, and the painting should not be too thick (the total thickness should not exceed 2 ㎜); All through-wall pipes should use casing, and the holes between casing and wall should be filled with plugs, and waterproof materials should be brushed to the height of 10㎝ and not too thick;

Fourth, pay attention to the position and height of waterproof coating. Ground; General wall brush 30㎝ high; The walls around the shower area should be painted to 180㎝ or the top of the wall; The location with a bathtub is 30㎝ higher than the location with a bathtub.

Fifth, do a good job in testing water. After the waterproof coating is applied to form a waterproof layer (about 24 hours later), the water will be stored for 20㎝. After 24 to 48 hours, see if there is any obvious decrease in water volume or go downstairs to see if there is any wet water point on the roof. If not, the waterproof construction is successful. Sixth, do a good job of protecting the waterproof layer in the later decoration to avoid damaging the waterproof layer.