Stronger than a profile pipe - there is no material to create a fence post. However, it also has one serious drawback. With the wrong approach, the pipes from the pipes begin to rust quickly enough that endanger the entire fence. Not the best way things are with wooden posts. The problem is especially acute in cases where fence posts cannot be concreted and they simply dig into the ground. In this case, it will be useful to go for one proven trick.
Of course, it is best to concrete the fence posts in the ground, making a gentle slope from the cement so that water does not collect. However, it is not always possible and resources to create such a structure “for centuries”. In this case, the pillars of the pipes just have to be dug into the ground. In order for them not to rust in the future, the following set of measures should be implemented. Firstly, the posts must be well primed and painted, both outside and inside. All this concerns not only metal poles, but also wooden ones. The latter do not rust, but they love to rot under the influence of dampness.
Secondly, it is necessary to build a protective "shoe" from ordinary plastic bottles. To do this, you will have to prepare a knife or scissors, the required number of PET bottles (it takes 2-4 bottles per pipe, depending on its dimensions), as well as a building hair dryer. If there is no building hair dryer, then you can replace it with any open fire from which hot air will pour out, for example, a fire. When all of the above is prepared, we get to work.
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First of all, we cut the plastic bottles so that we get cylinders: we cut off the lower and upper parts. Then, we estimate how much the metal column will enter the ground during installation. This entire segment with a margin should be covered with bottles: we pull onto the pole one after the other. Important point! Two or three bottles on a pole should be connected with an overlap, so that in the future they form a completely sealed structure.
Further, the matter remains small. It is necessary to take a building hair dryer and process the bottles with hot air there so that they melt and tightly compressed the surface of the pipe, creating a completely sealed structure in a segment of 50-90 centimeters. If there is no building hair dryer on the farm, then we make a small fire and melt the bottles on a column above it. You need to hold it not over the fire itself, but over a stream of hot air, otherwise a direct flame can burn through the plastic. The result is a very reliable protective shoe that will save the pillars no worse than cement for many years.
If you want to know even more interesting things, then you should read about Why do the Japanese install on lawns, near the pillars and fences bottles filled with water.
A source: https://novate.ru/blogs/161121/61268/