1. Focus on the quality of doors and windows:when choose the UPVC doors and windows,please touch and feel whether the blade of UPVC doors and windows is smooth and averaged,and check if the edge of blade is burred.Generally speaking,the UPVC doors and windows in good quality can be made well in details.Especially the window handles upvc made in plastics,woods and bamboo,if the texture is better,and its service life is longer.
2.Focus on the smoothness of doors and windows:Check the smoothness and evenness of UPVC doors and windows,and check if the gaps between each blade is consistent,and if the blade is  faded,or the obvious aberration.
3.Focus on the flexibility of accessories.There are two functions of the UPVC doors and windows’ adjusting connectors ,one is adjusting the lifting switch of the UPVC doors and windows.And the other one is adjusting the angles of the blades.When check and amend the adjusting connector,please try to pull and open the UPVC doors and windows firstly,which is to check if the lifting switch is smooth/And then please  rotate the adjusting connector to check if the rotation of the blades are flexible .
4.Focus on the color of appearance.The window handles upvc should be matched with the color and the decoration of the room.Thus,the appearance of the UPVC doors and windows should be focused on.Choose the UPVC doors and windows matched with the room’s  color will make your home more aesthetic.
In conclusion,please be careful to choose the one with the good quality,and then its service life is longer .