Why the windowsill is not brick but concrete pouring
1, anti-cracking requirements, many places have such a provision, especially the first floor, the purpose is to control the uneven settlement caused by the window hole cracks.
2, concrete pouring refers to the concrete pouring into the mold until the plastic process. In hot weather conditions, the temperature of the concrete into the mold should not exceed 30 ° C. It is advisable to prevent the template and the freshly poured concrete from direct sunlight, to control the temperature of the concrete into the mold template and the rebar and the local temperature in the vicinity of not more than 40 ° C. Should be arranged in the evening began pouring, should not be poured in the morning to avoid the temperature rise to the highest temperature rise during the concrete.
In order to waterproof, in some places also with solid brick, but the solid brick is more difficult to control the number of leather, and now most of the wall is porous brick, hollow block and the like, these things waterproof not, so with concrete pouring windowsill.
There is a certain reason is to fix the window.
Anti-cracking requirements, many places have such a provision, especially the first floor, the purpose is to control the uneven settlement caused by the window hole cracks.
