I needed to replace two slider windows on a older garage. Since it is unheated, single glass was ideal. The cost of these was better than any I had found. It works great. Only negative, is that it could use a better pull for sliding the window. Since the other window and doors have 1x4 trim I was able to mount this on the wook siding and use the built in J channel to slide the 1 by boards under the J channel lip. The previous windows were painted shut and looked bad. This window is a bit narrower than the old, which worked well, though I had make the opening higher, but it needed a header. Let's in more light and breeze.