I have purchased the Warm Windows 'material' but won't be making the curtain/drape until this Fall - I would 'guess' that you might want to stitch your decorative fabric to the 'Warm Windows' layers to keep it together but if I were me, I would only do it on the "line" where everything it fused (is it fused? my fabrice is at a different location than where the computer is) anyhow, there is a definite compressed portion - that is the only place I would stitch....let me know how your project turns out.

I am actually going to make a 'sack and encase the Warm Windows in the 'sack' so the curtain can be washed (for the bedroom of my 24 yr old single, grandson.....who know what might go on in that room!)

Carolyn

Thanks for the input Carolyn! Here is my thought on quilting it: It seems to me that fabric and Warm Windows material are not stitched down (or even just tacked down) at intervals that the fabric would just billow out when you go to open the curtain. It doesn't seem like it would "swing" with the Warm Windows fabric. The directions reccommend using spray adhesive, but I was thinking that quilting the two parts together would give it a nice look.

I've never seen/heard of the product, but if it's for insulation, think of this... If you poke a million little holes in the fabric (where your quilting lines run) aren't you creating a million little doors for air to come through? Just a thought..