Thanks to glass, we almost completely minimized thermal expansion, and as a result the panel has now much better dimensional stability, which means that it is extremely unlikely for the panel to expand or shrink due to the direct sunlight or freezing temperatures. You can rely on Evolution door panels for entrance doors because we use only toughened glass with very high bending strength and impact resistance, same as used in automobile industry or for building skyscrapers made of glass. No stuck, inserted or uneven parts that only increase the maintenance and decrease the functionality of a panel. Low weight, high security and stability. One piece, one line. One word. Evolution.