Houses in the area which is limited usually difficult to develop. Remaining land at the rear, the average trimmed down and used as the building. As a result, the spaces at the rear of the building to be minimal openings. Air and natural light would be difficult to even enter, let alone out.

As a solution, glass block can be used to insert the light into the room. In the example photo, glass block mounted on one wall of the living room which is also a back room wall. Of course the installation of glass block to be more effective if family rooms have plenty of natural light entering the opening. Thus, the light that comes into the family room can be transmitted through the glass block and illuminated the room behind.