Let's talk about the product selection of foaming agent for doors and windows and how its relatively standardized construction is.
01 foaming agent selection
Like door and window sealant, foaming agent also has inferior products.
By adding impurities (powder, oil, etc.) to polyurethane foam, the cost is reduced and effect of reducing foaming agent quality 」(Hard to cure, more than Air Force Drum Corps, soft texture, low service life).
As a consumer, the advantages and disadvantages of foaming agents are extremely difficult to distinguish (in fact, Xiaozhi is the same). For its purchase, I think the most direct and effective way is to choose the brand or model:
a, more well-known foaming agent brands include: Super AO, Selena, sang Les, Fengjing, gunuo, Tianyuan, SKSHU, Meisheng, Sanhe, Silicon Bao, Yu Sheng and Aofeng, etc;
B, the quality can also be roughly judged by the fire prevention model of foaming agent: Class A and Class B are the most common, and Class A is similar to class B, A 1 is higher than A 2 / A 3 fire level (similarly, B 1 is the highest). In terms of level, we recommend that you choose B 2 or more. If you have A budget, you can directly choose Class A;
c, the quality can also be roughly judged by the expansion coefficient of foaming agent: most of them are between 70 and 80. The larger the value, the faster the expansion speed, which is also a small detail of recognizing the quality;
02 foaming agent construction
Simple door and window foaming agent caulking, probably after the initial positioning of the door and window frame on the wall, directly put a circle of foaming agent on the gap around the window frame, and the subsequent door and window installation steps will be carried out when the foaming agent hardens.
So if you are rigorous and want to give full play to the performance of foaming agent, the construction can also be very particular:
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Before filling foaming agent, tools (brushes, etc.) should be taken to clean up the garbage and dust on the surface of the hole, and the filling of foaming agent is not full and the adhesion is not enough;
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Before filling the foaming agent, especially when the weather is very dry, it is best to wet the gap properly with a kettle, which will help the foaming agent to expand and also help to clear the ash;
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Before filling the foaming agent, shake the bottle body first, which will help the foaming agent in the bottle mix evenly;
△Tuyuan guanuo polyurethane foaming agent, the same below;
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Foaming agent construction, should be along the edge of the window frame, so that the construction can be more adequate, the later effect is more secure;
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When blowing agent is in the vertical position, it should be shot from the bottom to the top, so as to avoid the loss of blowing agent;
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After the initial expansion of the foaming agent (about 5 -10 minutes), check whether the gap is less beaten and make up the deficiencies, thus avoiding the possible lack of foaming agent and ensuring the later use effect;
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After no less beating or filling and initial expansion, the foaming agent should be compacted with tools such as scraper, so that it can be squeezed into the gap as much as possible before the foaming agent is fully expanded to make the gap filled completely full, the door and window frame are completely connected with the wall without dead corners. At the same time, it also saves cutting off of other types of work in the future, or the trouble of accidentally damaging foaming;
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After the foaming agent is fully expanded, the waterproof test can be carried out with sprinkling can first, and then the doors and windows can be installed with screws after passing;
03 the difference between paying attention to and not paying attention?
As can be seen from the above, the construction of foaming agent is relatively cumbersome. In fact, the installation of most home decoration doors and windows will not be so operated (cutting off after cleaning, polishing and curing).
In Xiaozhi's view, the purpose of "paying attention to" is to maximize the effect of caulking materials (weakening stress, supporting, insulation, etc.) from the perspective of construction, and avoid future door and window problems (sinking, leakage, etc.) that may be caused by caulking materials.
Although "exquisite" cannot be achieved immediately at present, it has accumulated a small amount and will make doors and windows more durable in the future.
