I've been searching around the internet and this forum looking for an answer. I am looking for a barn sash window. The smallest I have seen to purchase is 20x25. I am needing one a little bit smaller as it will go on my front door of the coop. How can I build one? I'm limited to a chop saw, skill saw and saws all I'm a beginner when it comes to carpentry. I've seen a video on you tube but it looked pretty complicated. I'll try to attach a pic of what I'm wanting. Thanks.