Moved into a new house and have to install blinds on all windows. Some of the windows were single, and I was able to mount the blinds on inside to the wooden frame. However, we have a few of these double and also triple window sets with a small 8 inch tall window-lettes (is that a word?) that complicates things.
We want to keep those small windows at top open, and mount it where the bottom up windows start, just below the first mullion.
As far as I can tell the mullion and joining frame is plastic on top of a thin aluminum structure.
I read somewhere that this is actually a structural piece and should not be drilled into. For the blinds we want to use two blinds with separate head mechanism.
Now the question :) How do I mount it? The ends can go into wood. What I am worried about is the middle. If I can’t drill into the mullion how do I support the middle and take the weight?
Worst case, we can move it up and cover the small windows and drill into wood frame, but since it is non standard size, the cost is almost double :(
Dimensions of one window: 34.5 inch W x 69 inch H. Mullion width is 1 inch.