Door and window hardware is made of insulated door and window hardware profiles and insulated glass, which have functions such as energy conservation, sound insulation, sound insulation, dust prevention, and waterproofing. The thermal conductivity K value of door and window hardware is below 3W/㎡ K, which is a common door and window. The heating cost is reduced by about 30%, and the sound insulation level is above 29 decibels. The water and air tightness are good, both meeting the A1 window standard. The general term for various metal and non-metallic accessories installed on building doors and windows. Plays an auxiliary role in opening and closing doors and windows. The surface is generally treated with plating or coating, which has the characteristics of sturdiness, durability, flexibility, economy, and aesthetics. Door and window hardware can be divided into building door locks, handles, supports, hinges, hinges, door closers, handles, latches, window hooks, anti-theft chains, induction door opening and closing devices, etc. according to their uses.

1. Profile wall thickness

Usually, door and window manufacturers in the home market, and most products with high material yields, have relatively thin wall thicknesses to reduce costs. The thickness of 1.2mm-1.3mm produced by small manufacturers is lower than the standard, but the standard stipulates that the thickness should be greater than or equal to 1.4mm.

The hardware configuration files for doors and windows are usually divided into 60 series (6cm), 70 series (7cm), and there is no distinction between good and bad quality of door and window hardware. Let's see what profile series are available for selection, which depends on the door and window hardware material, wall thickness, insulation tape, process, etc; Quiet cell, not a big window. A series of 60 selected profiles is enough. If the front of the battery, french window, high noise insulation for sealing requirements, 70 can choose a profile series.

2. Supporting accessories

When consulting the price of door and window hardware, we must ask whether it includes the cost of supporting crossbeam, column, casement hardware, locator, screen, waterproof glue, polystyrene foam plastic and other auxiliary materials, because many door and window hardware enterprises have quotation traps. In order to attract customers, they first lower the unit price and then make up for the difference by collecting various auxiliary materials. The cost of these auxiliary materials is usually several thousand yuan, and the total price is not cheap at all.

3. Add sub frame

The subframe is also known as the accessory frame and protective frame. The door and window frames are fixed to the wall for installing doors and windows. Generally used for profiles of 70 series and below. If the window needs to be covered with a window cover (window mount), tiles need to be pasted around the window, and the ceiling needs to be placed at the top of the window, then additional frames need to be added because the frames of 70 series and below profiles are relatively narrow, which will hinder the opening of doors and windows. The advantage of installing an auxiliary frame is that there will be gaps on both sides of the doors and windows after installation, which is not aesthetically pleasing. After adding auxiliary frames, all gaps can be covered. In terms of functionality, it is equivalent to a dumbbell for doors and windows, but adding an auxiliary frame requires a separate fee.

4. Sealing design

Different brand profiles also have different sealing designs, including three, four, five, six, seven, eight, nine, and even ten, such as varying degrees of sealing design. However, the top ten metal door and window profile production factories have two open external seals for their raw materials, sealing window 3. In order to meet the needs of consumers, many domestic manufacturers have increased the track of the internal wear band in their door and window hardware configuration files, so door hardware enterprises can wear their own strips. Therefore, some so-called sealing series have emerged. In theory, there are more and better insulation sealing strip numbers, but this has not explained the corresponding monitoring and evaluation, as well as the authorities.