Sliding windows
The advantages are simple, beautiful, large window width, large glass block, wide vision, high lighting rate, convenient glass cleaning, flexible use, safe and reliable, long service life, open in one plane, less space, convenient installation of screen windows, etc. The most used is sliding windows. The disadvantage is that the two windows cannot be opened at the same time, at most only half can be opened, and the ventilation is relatively poor; Sometimes the tightness is also slightly worse.
Suspended overhang
This is an aluminum alloy, plastic steel window that appeared later. It is a new form developed on the basis of casement windows. It has two opening styles, either flat or pushable from below. When the casement window is closed, push the lower part of the window outward, and a gap of about ten centimeters can be opened, that is, the window can be opened a little from below, and the open part is suspended in the air and fixed with the window frame by hinges and the like, so it is called overhanging. Its advantages are: it can be both ventilated and safe, because there are hinges, the window can only open a slit of ten centimeters, and the hand cannot reach from the outside, which is especially suitable for use when no one in the home. This function is no longer limited to casement windows, sliding windows can also be opened overhang.
