We recommend to use specialized materials for sun protection. 
GLASGARD – the original German quality with UV and heat protection up to 97%.

The description below is taken from official website of supplier www.glasgard.de We are pleased to present a new product! The most effective sun protection. You don't need to stick a film on the glass anymore, there is an excellent solution  - Glasgard. The original German quality at reasonable price. This is fine-pleated film which is rolled up like a standard roller blind onto cassette or traditional roll. Efficiency level is 95%. When the film is lowered you still have a possibility to view through the windowpane, staying inconspicuous. In case of double-glass pane is heated up to 65 degrees C, the surface of the film stays cool. You can see the swatches in our office or at our dealers all over Latvia.

SCREEN – is a unique material made of fine-intertwined PVC threads, creating small-cell mesh which is able to refract the sunlight not allowing it to get into the room and preventing extra-heating. Variety of colors and densities makes this material very popular. The producer gives 10 years guarantee for this cloth! Our company offers the widest range of “Screen” nets on the territory of the Baltic region. We participate in all possible tenders.