I would avoid the UV masking material that is applied with adhesive to the panes. Do you have multi-light windows (with smaller mullions [or is it muntons?] in each window? If you do, then maybe you could use a treatment that is not at all inconspicuous, but flexible and removable. Basically, you can get window shades that are like regular domestic windowshades, with any degree of uv/light filtering. As I say, they don't exactly blend into the woodwork, but they do their job, and they can be updated and removed easily. The UV filtering with adhesive is a real pain: particularly with multi-light windows it bubbles and separates. You can get UV filtering lexan and glass too, but they are real expensive. Actually, if I'm not mistaken (and if I am I'm sure someone will correct me) regular glass filters out a good portion of the UV, if not all of it (which is why cheap sunglasses say that they are UV protectant). You may be more worried about light levels and heat in the house, in which case, regular shades might be the best approach. Eric Siegel [log in to unmask]