Pattern 2: Window Area (Horizontal Windows)

10% Glazing Area

A horizontal band of windows at 10 percent of the wall area provides no area that meets or exceeds commonly accepted minimum daylight illumination criteria. The intense contrast between interior surface and line of sight to the exterior creates an extreme likelihood of glare and visual discomfort. All interior surfaces are dark in relation to the glazing.

Pattern 2: Window Area (Horizontal Windows)

20% Glazing Area

Pattern 2: Window Area

A horizontal band of windows at 20 percent of the wall area provides daylight illumination that meets or exceeds commonly accepted minimum daylight illumination criteria at approximately 15 percent of the adjacent 26’-0” section. A high level of contrast exists between the interior surfaces and the glazing. None of the interior surfaces receive sufficient illumination to balance the contrast of the glazing, this is especially problematic at the interior surfaces surrounding the glazing, creating a likelihood of visual discomfort.

Pattern 2: Window Area (Horizontal Windows)

30% Glazing Area

Pattern 2: Window Area

A horizontal band of windows at 30 percent of the wall area provides daylight illumination that meets or exceeds commonly accepted minimum daylight illumination criteria at approximately 35 percent of the adjacent 26’-0” section. Excessive contrast remains between the interior surfaces and the glazing. The interior surfaces are beginning to receive some illumination to balance the contrast with the windows. This is most noticeable on the “back” wall (at left).

Pattern 2: Window Area (Horizontal Windows)

40% Glazing Area

Pattern 2: Window Area

A horizontal band of windows at 40 percent of the wall area provides daylight illumination that meets or exceeds commonly accepted minimum daylight illumination criteria at approximately 45 percent of the adjacent 26’-0” section. Some contrast remains between the interior surfaces and the glazing, though it should be noted that the “back” wall (at left) shows a substantial increase in surface brightness to balance the luminosity across the section.

Pattern 2: Window Area (Horizontal Windows)

50% Glazing Area

Pattern 2: Window Area

A horizontal band of windows at 50 percent of the wall area provides daylight illumination that meets or exceeds commonly accepted minimum daylight illumination criteria at approximately 80 percent of the adjacent26’-0” section. Some contrast remains between the interior surfaces and the glazing, though the “back” wall (at left) shows a substantial increase in surface brightness to balance the luminosity across the section.

Pattern 2: Window Area (Horizontal Windows)

60% Glazing Area

Pattern 2: Window Area

A horizontal band of windows at 60 percent of the wall area provides daylight illumination that meets or exceeds commonly accepted minimum daylight illumination criteria at more than 90 percent of the adjacent 26’-0” section. Minimal contrast remains between the interior surfaces and the glazing, and the brightness of the “back” wall (at left) provides a balance of brightness across the section.

Pattern 2: Window Area (Horizontal Windows)

75% Glazing Area

Pattern 2: Window Area

A horizontal band of windows at 75% percent of the wall area (nearly 100% of the interior wall area) provides daylight illumination that meets or exceeds commonly accepted minimum daylight illumination criteria at more than 90 percent of the adjacent 26’-0” section. Minimal contrast remains between the interior surfaces and the glazing, and the brightness of the “back” wall (at left) provides a balance of brightness across the section.