FIES building

It was decided to improve the insulation of the roof by adding small pebbles. For this, the existing large boulders on the roof were distributed more evenly, the large holes were filled up with smaller stones, and the pebbles where spread on top of this. The layer of stones on top of the roof is now much more uniform and thicker, with the top being formed by the small pebbles. The amount of received radiation should be the same, but the emitting surface provided by the pebbles should be much larger, while the space between the top layer of pebbles and the roof of the building itself probably also acts as an insulating layer.

This improved things but still small temperature excursions were noted during the hottest summer days. White pebbles were added to the roof, but it was believed that this probably would not make much difference given the thick layer of pebbles that already exists. If was discussed if adding a second `false' roof on the white `lid' in the center of the building with a gap between them night help, but it was noted that this specific area does not seem become as hot as the rest of the roof. Maybe the solution would be to (only) add a `false' roof (with a gap between) on top of the rest of the roof.