Solar insert material originated during the second world war in the states where reflective technology was employed to make tanks invisible, needless to say it didn't!

The technology was released to industry after the war to be developed as window and shade film.

Solar inserts work by creating an effective solar shield from which 80% of the energy is reflected thus preventing it from passing through the roof.

In winter the reverse applies. Heat escaping through the roof is dramatically reduced resulting in reduced energy costs and greater comfort levels.