Abstract: There are many materials for doors and windows, and upvc windows are favored by most friends because of their good energy-saving effect. There are many brands of upvc windows, good and bad, so how can we choose good quality upvc windows? Here are 6 major skills that need to be understood. When purchasing upvc windows, you need to look at the name of the product profile, look at the quality inspection certificate, look at the packaging logo, don’t buy cheap goods, pay attention to glass and hardware, and look at the color of the product. The following is a detailed introduction. Take a look.

How to choose upvc windows

1. Look at the name of the product profile

Toxic upvc windows generally use cheap lead salt stabilizers as the main raw material. This raw material contains lead and is called "PVC profile". Non-toxic upvc windows use non-toxic, non-polluting, environmentally friendly mercaptan organotin T-137 stabilizer, named "VC profile"

2. Look at the packaging logo

Look at the product name, implementation standard, factory name, factory address, quality grade, etc. marked on the upvc windows package or attached label. For example, whether the basic content is fully marked, and whether there are ghosts or deviations in the color registration of text or patterns.

3. Look at the quality inspection certificate

After choosing upvc windows, you must ask the dealer for a product quality inspection certificate. If the inspection items in the certificate or inspection report are marked with lead components, it proves that the product is a PVC profile.

4. Don’t buy bargains

There are many roadside shops selling aluminum alloy and upvc windows, the price is much lower than the building materials market, but it is best not to covet such cheapness. Because doors and windows are not consumables, what is important is the service life. Good upvc windows have a service life of at least 10 years, while the lining steel used in cheap upvc windows is hot-rolled plate, which is not thick enough, and some even have no lining steel, and the glass and hardware used are also of inferior quality. There will be various problems after a year, and the cost of frequent replacement is not small.

5. Look at the color of the product

The color of the plastic profiles on the surface of upvc windows should be bluish white or ivory white, clean, flat and smooth, with no slip marks or bruises on the surface, and no open welding or cracking at the welding joints. Good quality upvc windows should have a protective film on the surface before installation, and tear off the protective film after installation.

6. Pay attention to glass and hardware

The glass should be flat and free of water streaks. The glass is not in direct contact with the plastic profile, and the sealing bead is used to stick the seam tightly to see the effect of use. Under the long-term action of sunlight and heat, lead salt-type upvc windows will form lead dust on the surface, which will cause lead poisoning and lead pollution. After lead enters the human body, except for part excreted through feces and sweat, most of it precipitates in the bone marrow and dissolves into the blood, damaging the bone marrow hematopoietic system, brain nervous system, urinary system and reproductive organs. Lead can also hinder human blood synthesis, leading to anemia, headache, dizziness, fatigue, drowsiness, constipation and limb aches and other symptoms. The above symptoms will not appear when using organic tin upvc windows. The sealing bead plays an important role in the airtightness of the window. The bead should be flat, without curling, no groove, and no smell. When the door and window are closed, there should be no gap between the fan and the frame. In addition, pay attention to the quality of the hardware, which is firmly installed and flexible to use.