Although the market is now increasing in the renovation company, but the quality of the renovation company is uneven, many owners in the housing renovation will appear after the quality of the problem, bringing the owners a great deal of trouble, today Fuwu home network mainly for you to explain how to do in Yangzhou housing wall cracking.
New house wall cracks are more common renovation common problem, the wall has five layers of structure, each layer out of the problem will lead to cracking: the
The first layer (structural layer): earthquake, uneven foundation settlement, excessive temperature changes, etc. lead to cracks in the wall.
Layer 2 (joints): the combination of new walls and old walls, the splicing of brick walls and ceilings, and the construction of slotted walls are all prone to cracking later if the materials or construction methods are not correct.
Layer 3 (cement layer): High cement grade, expired cement, sand too fine or mud content too high, incorrect ratio of cement mortar, scraping putty before the cement layer is dry …… will crack later.
Layer 4 (putty layer): The original wall’s grass-roots level is not cleaned up, the putty is not eradicated, and the original latex paint layer is separated from the new putty layer. As the saying goes, “seven points of putty and three points of paint, good paint needs good putty”. In the market, there are many fakes of putty and latex paint, especially putty, 80% of which are adulterated in small individual stores. When choosing putty, look for quality certificates and production dates to prevent expiration. It is best to choose the putty that matches the wall paint.
Layer 5 (paint layer): The previous layer of paint is not dry before painting the next layer, the outside is dry, the inside is not dry; or the paint is too thick at one time, resulting in low strength; or no primer, the wall is alkaline, resulting in putty layer chalking, cracking. There are “elastic topcoats” on the market, which can reduce the degree of cracking, but the role is limited.
In addition, there is “climatic cracking”: baking during construction, sun exposure, high winds blowing directly on the wall; or the temperature is too low, the paint can not form a continuous film; or temperature, humidity drastic changes …… will be cracked after. In summer, after the wall paint is painted to open the window to let the wall in a shorter period of time into a film. This cannot be done in autumn, otherwise it will shrink and deform. In autumn, keep the windows and doors closed for 1 to 2 days after painting, or ventilate only in the morning and evening to let the walls dry in the shade.
Repair methods for house wall cracks:
1、Pressure grouting method: Air compressor pours adhesive into the cracks of the brick wall to re-bond the cracked wall together.
2, external repair method: the original gap will be opened, repair with elastic putty, or use the entire sticky indeed cloth.
3, to the market to buy some paint special linen, the linen with white glue paste to the wall, and then to dry and coated with cement paint, in this case, can ensure that the wall no longer has cracks, but also can play a role in strengthening the wall.
4, the surface of the wall insulation board removed, or the surface of the wall to remove the cement, outside the installation of a layer of gypsum board finally on top of the latex paint. But this method of engineering consumption, but also has a certain degree of difficulty.
5, large cracks, the cracked wall substrate to make a “U” shape, the substrate to repair, and finally hanging wire mesh on it.
In most cases, wall cracking is caused by the evaporation of moisture. The moisture may continue to evaporate, so it may continue to crack even if it is repaired. In addition, if only a small area is repainted, there will be a color difference between the new paint and the old paint. If you want to reduce cracking because of the high quality of decoration, you can put non-woven fabric on the wall first, which can reduce the cracking by more than 80%. When applying non-woven fabric, you should use high quality glue, of course, the cost will increase.
