Is window caulking done with cement mortar or foaming agent?

Someone misunderstood that "The foaming agent used to connect the wall and the frame is not strong enough."

It should be noted that the foaming agent is mainly used for sealing, and the connection must also use a fixed piece!
It is most suitable to use a combination of internal blowing agent and externally applied cement mortar.
Whichever of the above methods does not violate current national standards and industry norms.
If it is an ordinary non-energy-saving door and window, it is recommended that three sides (upper, left, and right) be used as foaming agents, and waterproof cement mortar be used. This is also the practice of Japanese YKK ordinary doors and windows. Japan later imposed some restrictions on this. It was not a safety issue or an anti-corrosion issue. It was an issue of energy conservation.
If it is a thermal energy-saving door and window, it is recommended to use dry construction, and it is recommended to use a fixed adjustment sheet. Try not to use steel subframes.
The quality of the foaming is better, continuous and full. The gap between the wall and the window frame cannot be more than 20mm. Too big, foaming is not necessary.
The waterproofing of styrofoam is better, and the steel strip sub-frame works. Now the outer side of the steel sub-frame is made of styrofoam (≤20mm). First, the bottom cushion is good, foaming around, and then remove the wooden wedge to make up the gap. When the surface is dry, the foam is not cut. When the surface is dry, it is pressed out by hand. Then the building is closed. When the aluminum window is installed, the gap between the aluminum window and the secondary frame is still foamed.
The styrofoam has a very good waterproof effect. It is just as good as cutting the skin, because good styrofoam is a closed cell structure, not an open structure, so it will not affect its waterproof effect. In foreign countries, even Someone used styrofoam to plug the water hole and closed the hole in one minute.
Styrofoam has good adhesion to concrete, masonry and metal. Except rotten foaming agent, you can cut it with a knife to see if it is sticky to the material after the foaming agent is dry on site ( Many people now only look at whether the surface is smooth and do not look inside, and they are even more invisible from the outside.
The tear strength of styrofoam can reach 14N/CM2. Foreign windows do not have to be permanently mechanically fixed. They use temporary fixation. After the foaming agent is sprayed, the temporary fastening points are taken out directly, depending on the strength of the foaming agent itself. And viscosity to fix the window.
Ninety-six percent of domestic manufacturers are eagerly pursuing foaming, the density is very small, and the air in the middle, of course, cannot support the weight.
Mortar is very dense, but it will crack, leaking, no matter how good you do, the reason is very simple, no different material thermal conductivity, deformation coefficient is not the same, it will certainly crack, it will certainly leak, early, late, and temperature Deformation is a trivial matter. Any vibration will cause the interface to distort. Many people say that I have never leaked water, and have passed the quality inspection. The chance of leaking with styrofoam is much greater. Hey, I said, you are temporarily using mortar. Leaking water, you can do 5 years, 10 years without water leakage? The best is nothing but leakage of water within one year after the completion of the project. After receiving the money, who will control you and will leak after 2 years? The degree is due to the poor level of construction, the failure to fill up, and the poor quality of the foaming agent used.
However, if high-quality styrofoam is used, the correct excuse for handling and construction, and the window filled with foaming agent, once it is not leaky, it can be guaranteed to leak for 10 years. It can be done abroad, plus insulation and sealing. The effect and mortar are not the same.
This does not leak with the mortar for a while, and the long-term guarantee of leakage is completely different.
Therefore, everyone can see that the leakage of styrofoam is not a bad material, it is difficult for everyone to buy a good blowing agent, or because of cost reasons, reluctant to use a good blowing agent.
It is not the problem of the process itself that the foaming agent seals and fills.
The use of cement mortar is bound to leak, it is only a matter of time sooner or later.
(1) To have a certain density (between 12 and 16), so that the strength is also there, can not one-sided pursuit of the amount of foam, not playing is not more money?
(2) must be closed-cell structure, and to ensure that after curing is > 90% is closed-cell, so that it can achieve the effect of waterproof, heat insulation, insulation
(3) Adhesion must be applied to both sides of the material (brick, stone, concrete, PVC, aluminum, etc.)
(4) It is best to use pre-foaming technology. The site can be controlled without wasting material and without cutting. The material will not be deformed due to late stress, and the doors and windows cannot be closed.
Leave no less than 1cm of space between the steel frame and the wall, fill it with styrofoam, and then waterproof it with a waterproof coating.
The national regulations do not clearly state that in the end it is necessary to play several aspects. In Europe, it is necessary to fight four sides. From a practical point of view, as long as the quality of the blowing agent passes, the effect must be to play 4 sides.
The bottom is filled with a waterproof mortar and the remaining three sides are filled with a foaming agent.