There are two cement flues in the building decoration bathroom. What are they for?

There are two cement flues in the bathroom? This is a flue with two holes. In the past, ventilation pipes were designed like this, one was the supervisor and the other was the adjutant. Every bathroom is ventilated to the main air duct through the secondary air duct, and there is a design to prevent air return between the primary air duct and the secondary air duct. This is a series of operating procedures. It is suggested to search the database of Wanju Company, which contains many relevant details. The required characteristics of smoke pipes are fire resistance and low thermal conductivity. At present, fiber cement pressure plate is the mainstream way to make flue. Fiber cement pressure plate is a new type of material, its fire resistance rating is A, and it is light and high strength, which is also beneficial to construction and widely used.

It's simple, but I don't have a video. After determining the size, make a cover with a square tube. Then you find bamboo plywood and make a template, cement mortar and fiber cloth according to the size. There are two cement flues in the bathroom? This is a flue with two holes. In the past, ventilation pipes were designed like this, one was the supervisor and the other was the adjutant. Every bathroom is ventilated to the main air duct through the secondary air duct, and there is a design to prevent air return between the primary air duct and the secondary air duct. After the kitchen flue is damaged, the exhaust duct of the range hood can be placed on the balcony through the ceiling of the kitchen and then connected to the outside of the balcony.

It can be used, but now it is stipulated that manual flue should not be used, but mechanical cement flue should be used. As long as the thickness reaches 1.5CM, all indicators meet the technical quality requirements. Most flues are prefabricated by sulphoaluminate cement and alkali-resistant glass fiber mesh or ordinary portland cement and steel wire mesh. The building industry standard "Exhaust Pipe for Residential Kitchen and Bathroom" (JG/T 194-2006) promulgated by the Ministry of Construction is applicable to exhaust pipes made of various raw materials.

What is the main reason why tiles fall off the flue? In terms of engineering quality, installation and materials, the more specific, the better. This situation is generally due to: insufficient flue wall thickness, easy to absorb water, but also easy to volatilize water; Before construction, the flue was very dry and was not soaked in water. The ceramic tile is directly attached to it, and no interfacial agent is used, which leads to the weakening of the adhesion between the flue wall and the ceramic tile, that is, the adhesion between the ceramic tile and the flue wall. I don't know if you are a horizontal bar or a vertical bar. If it is a column, it is just the part of the yang angle. It is estimated that the original flue foundation is not done well. I suggest that you reinforce the whole flue, that is, re-ash the flue, maintain it for more than 3 days, and then stick bricks. Don't bother, stick it with glue. However, the quality of the flue layer is really bad, and there will be hidden dangers of tiles falling off again.