**3.3.2 Southern orientation**

436 Solar Radiation

Quartz zinc, beige 47.1 (+12.6) 26.2 (-2.3) 35.7 (+4.4) Quartz zinc, turquoise 48.2 (+13.7) 26.1 (-2.4) 36.2 (+4.9) Quartz zinc, light blue 48.8 (+14.3) 26.1 (-2.4) 36.5 (+5.2) Quartz zinc, natural, light grey 44.7 (+10.2) 25.7 (-2.8) 35.0 (+3.7) Quartz zinc, natural, dark grey 49.5 (+15) 26 (-2.5) 36.8 (+5.5) **Ceramic tiles / panels 10 x 10 cm facing West** White colour (glazed) 44 (+9.5) 25.1 (-3.4) 33.6 (+2.3) Ochre colour 48.4 (+13.9) 25.1 (-3.4) 35.9 (+4.6) Beige colour 48.8 (+14.3) 25.5 (-3) 36.4 (+5.1) Light grey colour 49.8 (+15.3) 25.1 (-3.4) 36.4 (+5.1) Brown colour 51.9 (+17.4) 25.8 (-2.7) 38.1 (+6.8) Red-Dark red colour, black spots 52.4 (+17.9) 25.6 (-2.9) 37.1 (+5.8) Olive green colour, black spots 52.5 (+18) 25.3 (-3.2) 37.2 (+5.9) Dark grey colour 52.8 (+18.3) 26.2 (-2.3) 38.0 (+6.7) Blue colour 53.1 (+18.6) 25.9 (-2.6) 38.2 (+6.9) Black colour 54.3 (+19.8) 26.2 (-2.3) 39.0 (+7.5) Black colour, with white spots 56.6 (+22.1) 25.8 (-2.7) 38.8 (+7.5) **Ceramic panels 25 x 13 x 1,3 cm facing West**  White colour 44.1 (+9.6) 25.9 (-2.6) 33.8 (+2.5) Beige colour 46.4 (+11.9) 25.9 (-2.6) 35.3 (+4) Light grey colour 47.2 (+12.7) 25.7 (-2.8) 35.2 (+3.9) Brown colour 52 (+17.5) 25.2 (-3.3) 37.4 (+6.1) **Marble panels 20 x 30 cm facing West** White colour 39.6 (+5.1) 24.2 (-4.3) 31.6 (+0.3) Light grey colour 46 (+11.5) 24.5 (-4) 34.2 (+2.9) Beige colour 49.1 (+14.6) 24.6 (-3.9) 35.5 (+4.2) Grey-Beige colour 51.2 (+16.7) 24.6 (-3.9) 36.5 (+5.2) Grey colour 54.4 (+19.9) 24.5 (-4) 37.7 (+6.4) Ochre colour 55.4 (+20.9) 24.9 (-3.6) 38.1 (+6.8) Dark grey colour 58.1 (+23.6) 25 (-3.5) 39.8 (+8.5) **Granite panels 20 x 30 cm facing West** White-Beige colour 48.1 (+13.6) 24.7 (-3.8) 35.5 (+4.2) Salmon colour 47.7 (+13.2) 25.6 (-2.9) 35.3 (+4) Red-Black colour 56.6 (+22.1) 26.1 (-2.4) 39.4 (+8.1) Black colour 57.5 (+23) 25.7 (-2.8) 39.8 (+8.5) Grey colour 59.1 (+24.6) 26 (-2.5) 40.3 (+9) Table 4. Overview of the experimental measurements on samples of building materials

When facing towards the west, even light-coloured composite aluminium panels (white colour) recorded surface temperatures, which were higher than the corresponding air temperature by more than 10 oC. For the range of colours, mean maximum temperatures were 10 oC (for white colour) to 31.8 oC (for black colour) higher than the mean maximum air temperature. Mean surface temperatures range from 33.7 oC for white to 42.4 oC for black panels, and are thus 2.4 oC to 11.1 oC higher than the mean air temperature. Finally, the surface temperatures at 20:00 (after the sunset) are between 30 oC and 35 oC and are no more

facing West.

**3.3.1.d Metal products** 

than 5 oC higher than the air temperature at that time.

The atmospheric conditions throughout the week of measurements were clear skies (0/8), high air temperatures (mean maximum air temperature of 34.7 oC, mean minimum air temperature of 28.3 oC and mean air temperature of 31.2 oC).
