For the decoration of the old fritters, every place can make a big fuss about it. For example, if you quote, divide the cement and sand into several rooms and add a little more to each room. You may not see the extra hundreds of dollars.
For example, painting walls and giving you putty that is not waterproof; Before tiling, the tiles were not soaked in water, and the wall plastering was not watered. There was no problem at that time. After living for several years, tiles may crack or fall off.
These are also the second, the concealed works of decoration, which you can't see at all in the later period, and you can't judge whether it is good or not.
Today, I will talk about the hydropower transformation that has the greatest relationship with safety, is the most prone to problems and is also the most difficult.
First, hydropower transformation, generally how to pit money?
To understand the tricks, we must first understand the settlement method. There are usually two modes, each of which is very difficult and very different.
One is calculated according to the actual amount. How much work was done, how much materials were used, and even how much money was spent. There is also a one-price contract. Estimate a total price, which exceeds that of the foreman. In this way, the average foreman will have enough profit.
The problem of cutting corners is most likely to appear in the unified price, because all the savings are earned by the foreman. According to the actual amount of money, the problem of winding and deliberately using more materials is more likely to occur.
In most cases, it is calculated according to the actual meters. Hydropower rarely counts as a price because it is unreasonable. If it becomes less, it will suffer; If it changes too much, the foreman will quit if he loses money, or he will find other ways to increase the money.
Second, what are the common problems in hydropower transformation?
① Slotting: Slotting is involved when doing hydropower, so there are two prices: no slotting and slotting. It should be noted that places without slotting are also charged according to slotting, and the slotting costs include backfilling, and some will deliberately recover the filling costs.
② Threading: Generally, one tube passes through three wires, and the threading in the tube does not exceed 40% of the cross-sectional area, which is subject to pulling. But there will always be unexpected pits waiting for you.
For example, according to the actual number of meters, workers may wear only one thread in a pipe and earn more money with more materials. If it is all-inclusive, it is possible for a pipe to pass through six lines, because the total price is fixed, and you can make more money by cutting corners. Too many threads not only affect safety, but also can't be pulled out and can't be repaired in the future.
③ Wire diameter: We usually use 2.5/4/6 square meters of wire, but seldom use 65,438+00 square meters.
Note that the indoor line should not exceed the outdoor line. For example, your home line is only 4 square meters, and the foreman tricked you into using 6 square meters. There is no need to spend more money.
Steal: I'll give you cheap wires and water pipes, or water pipes and wires left over from other construction sites, even if the brand materials are different.
Inferior wires have large resistance, thin rod, insufficient length and unqualified insulation. When in use, they are easy to heat up, leading to wire burning and even fire. Quite a few fires are caused by electrical accidents.
At present, ppr water pipes are popular, and some of them will be shoddy to reduce costs. Inferior PPR pipes are easy to deform, explode and not durable.
⑤ Calculate more: At the end of the final hydropower project, many foremen like to calculate more. If they don't stare, they will be easily fooled and spend a lot of money if they are not careful.
⑥ Terminals: Each wire of the lamp will have terminals over 15cm, and switches and patch panels will also have terminals, but they will not be too long. This fee can be reduced through negotiation.
Does this article think that the decoration is really not easy, and it is necessary to learn this knowledge so as not to be cheated?