Building insulation energy-saving glass membrane are generally to be attached to the inside of the glass and attached to the medial better, this is because the film glass paste in lateral vulnerable to wind and rain, and other accidents lead to damage to the glass membrane, which affects the actual life of the glass film and glass membrane attached to the posterior medial can avoid these. Glass film in actual use is through reflection and absorption to stop more heat into the room of, reflection is actually glass film metal layer in effect, while the heat absorption is through the special structure of the glass film to heat adsorption on the glass film. The glass film attached to the inside due to the protection of a good general as long as the real film is used a few years, there are several decades, because the glass film will not be easily scratched, scratched, or appear what other circumstances.
It is not very good, and the anti ultraviolet is proposed.
For the performance of the heat insulation, you should make sure to choose the metal film.
