What is COATING?
In fact, COATING is a type of isolation and insulation work, which uses bitumen and gunny for insulation. The sack used in this type of insulation is usually imported from other countries and sold in three grades in the market. Bitumen and sack used in this method have the following characteristics:
Sack
According to the regulations of our country, the characteristics of a suitable sack should include the following characteristics: being new, finely woven, healthy, without the need for the weight of each square meter to be about 38 grams.
Bitumen
The bitumen used in this method is also produced from the distillation of crude oil, which is offered in three types in the market:
First bitumen: This type of bitumen is solid and is marketed with the abbreviation A.C. It is directly produced from crude oil.
Second bitumen: this bitumen is produced by aerating solid bitumen and have different types.
The third bitumen: The third bitumen is the solidified bitumen, which is supplied with an abbreviation and accepts one of the most important features of these bitumen and is made by aerating the bitumen.
COATING or Isogam is better?
In order to compare COATING and Isogam, we want to talk about the advantages and disadvantages of each of them so that you can know for yourself which of them is suitable for your desired work and make the right choice.
Benefits of Isogam and COATING
WATERPROOFING
Isogam is more resistant and protects your roof more.
Isogam is easy and fast to perform on surfaces.
Isogam implementation is cleaner.
Isogam weight is much more suitable and less.
Isogam is more resistant to freezing.
COATING
Its thickness is greater than Isogam.
From an economic point of view, it is cheaper and more economical than Isogam, and the price of Isogam is lower.
Bitumen sack can be repaired and is easier than Isogam.
It is more suitable for insulating small spaces.
It is easy to implement and does not require expertise.
Disadvantages of Isogam and coating
WATERPROOFING
It is difficult to install Isogam in the seams.
Isogam can be installed only in the dry season.
Sharp tools can damage the isogam.
Isogam is not resistant to ultraviolet rays.
COATING
Sack bitumen rots and wears out over time.
If the roof sits, it will crack.
Its implementation in hot seasons may cause the bitumen to become soft.
The implementation of this method is dangerous due to the hot bitumen and requires compliance with standards.
Kinds of coating
coating is performed in two types, single-layer and double-layer. This difference can be in the type of implementation or the type of bitumen and sack used in it.
Single layer sandblasting
In this type of bitumen, a layer of bitumen is poured on the desired surface and then a layer of sacking is placed on it. Finally, a layer of bitumen is poured on it.
The rejection of this method, first a layer of bitumen is poured and then a sack is placed on it. This is done twice to form a floor covering for the roof. The thickness of this type of stone is about 2 to 3 cm.
Applications of coating
As you know, the most important application of coating is to insulate various places, including the kitchen, the roof and walls of the building, and the bathroom floor. Among its other uses, it can be mentioned to use it for the legs of metal columns and to insulate their legs. Preventing the metal columns from rusting and insulating the porcelain seat of the walls are other examples of the applications of this method.
How is coating performed?
Usually, after the installation of the floor and roof, and the roof slope and rounding, it is time for the isolation of the building.
In the novel, the surfaces must be completely dry and smooth because it cannot be done in case of rain.
To do it, you must first slope the roof and then completely dry the roof surface.
The number of tar sack layers should be considered based on the type of protective coating on it and also the weather conditions.
After isolation, it’s time to test by draining water from its surface for 24 hours. During this period, no leakage should be seen.
In case of basic installation and implementation, expert and experienced people should be used in this work.
Important points during coating
You must cover the desired surface completely with cement before performing the plastering, so that the cement does not have any cracks and the insulation is completely attached to the surface and covers all the seams.
In the next step, bitumen should be poured on the bitumen with a maximum temperature of 180 degrees so that it covers all the cemented parts so that later water and moisture cannot pass through it and enter the building.
After that, the bitumen surface should be covered with first grade sack. Pay attention to the fact that the sack does not tear when it expands.
In the next step, by combining soft bitumen and hard bitumen, we pour another layer on the sack. In this part, pay attention that the sack does not tear and that the bitumen is spread on all surfaces.
At this stage, we cover the sack again with a layer of bitumen. It is necessary to follow all the points mentioned in the previous steps in this step as well, in order to install and run it in the most correct way.
In the next step, we cover the sack again with a layer of bitumen to increase its thickness.
In the last step, you should test your insulation to make sure that it works well and has the ability to prevent water penetration. This test should be done one day after the dewatering operation, so that if the water passes through the insulation, it can be prevented by creating another layer of tar sack.
