In this article, Brother Peng continues the "product problem" left unfinished in the last article, and talks about how to ask about the workmanship of doors and windows, as well as the experience of door and window owners in design and installation, and choose good merchants from them.
0 1 Asking about the work of doors and windows-Equipment and quality control.
The workmanship of doors and windows is to examine the comprehensive ability of a door and window factory in processing machinery, workers' experience and management system. Brother Peng simplified them into "equipment" and "quality control" of the door and window factory.
Don't underestimate the workmanship of doors and windows. If the structure and supply chain of a specific door and window product are theoretically the upper limit of the performance of this door and window, then the workmanship of the door and window ensures its lower limit of performance. Next, take "making window frames" (cutting, milling holes and assembling corners) as an example:
1, "equipment"
According to the level of production equipment, it can be roughly divided into four types of factories. ① The "street shop" has at most one cutting machine to cut security window stainless steel pipes, aluminum alloy square pipes and press lines. Others are semi-finished products bought from aluminum factories and sold home for assembly, all made by hand, with low accuracy;
(2) Factories such as "Windows and Doors Factory with local business as the main business" don't need to deliver goods to foreign dealers, so the requirements for details are not high. Cheap or second-hand domestic equipment is the first choice for this kind of factory. But it will be equipped with a full set of equipment, except that the double-headed saw may be numerically controlled, and the rest may be manual. Positioning with tape measure and manual feeding, the error is obviously disturbed by human factors;
(3) Factories such as "Windows and doors factory as dealers" need to send the finished products to foreign windows and doors dealers. If the production details are not up to standard, the distributor will vote with their feet to stop cooperating with the factory, so they will pay attention to higher product details. Will spend money to buy better domestic equipment or foreign equipment with higher precision (the value of a double-headed saw is equal to the complete set of equipment of the second-class factory), the double-headed saw must be numerically controlled, and the drilling and milling equipment will also be numerically controlled, so the error caused by the equipment basically meets the specification requirements;
(4) At present, there are only a few "head door and window factories" in China, which have introduced tens of millions of production lines, put the aluminum profiles of the 6-meter factory at the first end, and take out the materials cut and milled according to the input order information for direct assembly. The error is minimal.
Production equipment is a hard power of door and window enterprises. If it is reflected in the production of window frames, the most obvious thing is how many seams (visible seams) it has, such as the splicing position, pressing position and keyhole position of profiles. These visible cracks will be affected by light, air leakage, operational flexibility (milling holes) and face value.
These four types of equipment are also reflected in the performance and price of doors and windows. Brother Peng doesn't recommend buying it? (1) work manufacturer; The performance requirements for doors and windows are not high. For example, if only the requirements are similar to those of ordinary real estate developers, you can only find a balcony for washing and drying from type 2 manufacturers; What should I do if I have specific requirements for the heat insulation and sound insulation of doors and windows? (3) and (4) Manufacturers.
To judge the manufacturer's production equipment, we need two questions: (1) Boss, which factory made this door and window, what is the specific scale, how many workers there are, and do you have factory photos? (2) How to ensure the machining accuracy? What machine is used to cut profiles? What machine is used to mill the keyhole? What machine is used to mill the center pin?
Remember a key point, the more numerical control equipment a manufacturer has, the greater its strength, and the less likely it is to be shoddy.
2. "Quality control"
If equipment is the hard power of the factory, then quality control is the soft power of the factory. Quality control refers to a series of production standards (precision control, assembly details, etc. ) The factory has formulated for each door and window series according to years of experience and relevant standards+the worker management system formulated according to production standards+the acceptance system formulated according to production standards and management systems, etc.
When we compare. (2) and (3) factories need to fully understand their quality control capabilities. Because the hardware of different factories may be exactly the same (just purchasing equipment), the quality control of different factories is definitely different, and the products bought by consumers are definitely quality control issues.
How to compare, the best way is for consumers to visit the factory on the spot, and the next best thing you can do is ask the merchant: (1) Boss, are there any videos of workers screwing screws, cutting profiles, milling keyhole, coating the head glue, assembling corners and injecting glue? I need to know a few.
(2) Do you have any photos of the windows made in the factory? Send me some details? Where is the construction site being installed nearby? Let me see.
A boss with a good attitude and hard work is really not afraid to show it to you, and he is not worried that there are not many doors and windows at home, and he is afraid of being rejected and annoyed by the boss. If you refuse, you are afraid of being "inferior" by your peers.
The above are the purchase elements of door and window products summarized by Peng Ge. After finding a product with a structure suitable for home needs, we can basically choose one or two suitable products through the comparison of supply chain and workmanship.
But that's not all, because when one or two merchants come to your house to measure the quotation. There may be a big difference between the two quotations, so don't rush to choose the low price. You also need to ask the merchant some "details" about the design and installation:
02 Design and Installation End-Improper Mouse
1, design side
Although the design of doors and windows is small, there are many stresses, because the quality of design will directly affect the safety, practicality and value of doors and windows in the future. Give four examples:
①? The window type of the external window is not suitable for all families. Some bosses in the southern region do not fully understand the needs of users and directly recommend the external window. But in fact, this is not the case. For example, the eaves of your house are not wide enough, and it is raining. At the same time, you like to open the window for ventilation for a long time, so opening the window is not suitable for your home. Because the window is opened in rainy days, the rain is easy to drip on the window sash and then splash indoors.
Choosing the right window type needs to be fully understood: living habits+window environment (home decoration layout such as ceiling, cold and warm design such as floor heating)? +Environment outside the window (noise, wind and rain, eaves, etc.). ).
So here? If any of the four conditions are met, it is necessary to consider whether the outer window is 1 and the eaves are less than10 cm; ; 2. Living habits of having fresh air at home or not opening windows very much; 3. The local climate can be ventilated by windows, but it often rains; 4. It is inconvenient to walk to the window with floating windowsill.
(2) Some owners of doors and windows who lack details do not pay attention to the height of the windowsill and directly design their hands in the center. After installation, you will find that you have to move a stool and stand on tiptoe to open and close the window. The height of the handle is only a small detail of the practicality of doors and windows, but the height of the window sill, the height of the window operator and the easy access direction should also be fully considered.
③ Doors and windows are safe. In the case provided by Peng You in the following figure, the horizontal bar in the scheme is too low from the ground, and there is indeed an "improper" operation experience. In general, it is suggested that the height of the horizontal mullion is about1m. ..
④ The indoor scene is complicated: for example, the water pipes in some old communities are too low, which leads to the overlapping of ceilings and windows.
There are also doors and windows with high requirements for sound insulation and heat insulation ... If you think about these designs carefully, they are actually not complicated. The main requirement is that businesses should have experience and patience. So you can ask the merchant: (1) Boss/? Design designer, how long do you work? How many times have you measured? How many customers does your company need to make a year? Have you installed it near our home/community? How many have you made? Can you show me around?
(2) Sound insulation is my main consideration? /? Insulation? /waterproof/? Is it safe? /? In terms of aesthetics, what are the stresses? Do you have similar case photos and configuration instructions? (3) Why do you want to add square pipes here? What is the error between the size of the order and the installation? Can you guarantee the accuracy of the dimensions on the drawings?
Remember, the trial and error cost of doors and windows is too high. Only look for experienced door and window owners. Don't choose those who have just entered the industry and are rough, even if the product price is low. If you solve the problem later, you will collapse, which will reduce the cost performance of the whole scheme.
2. End of installation
The installation end affects the beauty and performance of doors and windows, and a good product needs good installation to play its due performance. Beautiful, such as the sealant is crooked, the screws are not countersunk, and the doors, windows and window frames are not horizontally aligned; In terms of performance, insufficient filling of foaming agent does not affect thermal insulation and sound insulation; Inferior screws, less hitting, or hitting on the heat insulation strip affect the safety and heat insulation; Using inferior sealant has the advantages of less beating, short service life and easy cracking and water seepage. These are all signs of poor installation.
And the installation requirements of good businesses require three points? , to provide you with high-quality materials, experienced installers and supervise the installation. Sealant adopts domestic first-line brands, and there is no inferior glue; The foaming agent is 1 fire resistance grade; Exposed screws are made of stainless steel, and expansion screws are made of nylon; Installation masters, especially apprentices, are best "masters" who have made high-demand orders for a long time and have more than 3 years of experience; If there is a formal supervision and acceptance standard, it can be accepted by the acceptance form.
It costs money to do these three installations well, but these are difficult to be reflected in the quotation of the merchants, so you should confirm these problems before deciding which one to buy: (1) boss, your screw/expansion screw/? What are the materials and brands of installation materials such as sealant/foaming agent? Have you got any pictures? Let me see. (2) Boss, what's your waterproof experience with the outer window sill/sun room? What if the windowsill is so flat/narrow/the sun room is so complicated?
(3) Boss, what is the experience of your installer? Are they all fixed or outsourced? How many orders do you want to place a year? What is the installation ability? (4) Have you observed/trained any installation specifications? Is there a glass mat in the glass? Is there a requirement for the spacing of screw holes? How to pass the hardware opening and closing? Can you show me the installation location? (5) Is there a basis for acceptance? (6) What is the installation problem? What about after-sales problems?
White people who decorate doors and windows must remember to choose guaranteed installation materials and relatively implement the installation specifications and acceptance specifications of enterprises.
Ok, so far, Peng Ge's "Eight-year Experience Random Talk Series" is over. To sum up, Peng Ge often tells customers that "the product, installation and design of doors and windows" is the safest only with the tripartite relationship, which may be self-boasting. However, in the past year, Peng Ge also received hundreds of complaints from "friends" who complained that the doors and windows at home were not properly installed. Their problems basically appear in the design and installation of the scheme.
With the help of these three articles, I hope everyone who is buying doors and windows will understand that when choosing doors and windows with performance requirements, we should pay attention to the product structure, supply chain and workmanship, and at the same time, we should not ignore the design and installation inspection of door and window merchants.
The above content is shared by good users, I hope I can help you ~