In the process of waterproofing construction, it is often mentioned that the waterproofing of lightweight walls and walls should be fully covered, and a water spray test should be done. Why are the requirements for lightweight walls so high? Why are lightweight walls easy to leak?
1. About lightweight walls
Lightweight wall: It is often used for non-load-bearing walls in the actual construction process, or for temporary construction in the later stage. However, due to its own performance and characteristics, once it is not handled properly, it will easily lead to a series of problems such as mildew and dampness on indoor walls and tile falling off.
Relevant data show that: especially the partition wall in the bathroom, not only the phenomenon of hollowing and cracking is serious, but also the tiles falling off, the water seepage along the wall and the frame column, the crack connecting with the ground, and the phenomenon of water bleeding on the wall, even adjacent to the bathroom The upper and lower walls of the room also had serious water bleeding.
2. Characteristics and hidden dangers of lightweight partition walls
1. Features: Lightweight block is a new type of building material with light weight and porous, thermal insulation, good fire resistance, nails, sawing, planing and certain earthquake resistance.
Lightweight blocks are increasingly used in infill walls of frame and frame-shear structures due to their small bulk density, good thermal insulation, thermal insulation, sound insulation properties, and ease of on-site processing.
However, the shortcomings of light body partition walls are also obvious, such as high water absorption, large drying shrinkage rate, soft surface material, low strength, and difficult powder surface construction.
2. There are hidden dangers
1) Wall leakage occurs more often
The impermeability of masonry is relatively poor. Its impermeability mainly depends on the masonry mortar in the masonry and the stucco layer on both sides of the masonry. When the bathroom is used in a hot bath, a large amount of water vapor will be generated.
And because the light wall has the characteristics of easily absorbing water vapor in the air and deforming and cracking, a large amount of water vapor enters the wall, and over time, the water absorption of the wall reaches saturation, which often causes the back surface of the wall to be damp and moldy.
2) Lightweight partition wall decorative tiles fall off
If the tiles are paved with cement mortar or ready-mixed mortar, due to the super water absorption and easy deformation characteristics of the lightweight partition wall, the mortar will lose water and crack prematurely.
It often occurs that the ceramic tile and the bonding mortar or the mortar and the light block can not be effectively bonded and fall off.
Therefore, lightweight walls must be fully waterproofed!
In order to make light-weight blocks more ideally used for sanitary partition walls and walls in wet parts, it is necessary to seal the water absorption of the surface layer of the light-weight wall, so as to effectively prevent the problems of water-absorbing deformation and cracking of the light-weight wall. .
Combined with the characteristics of the lightweight partition wall and the performance of the current waterproof coating, the whole wall is selected for waterproof treatment.
The large surface of the lightweight partition wall is sealed and fixed by the coating waterproof layer, which can block the water absorption of the lightweight partition wall, thereby effectively preventing the cracking of the mortar layer and the excessive water absorption of the lightweight wall causing mildew and dampness on the back surface.
