A suspended ceiling system was chosen. The sleek, easy and quick to install rail system, on which the white wood wool boards are fitted, is in a matching colour to give the large ceiling expanse a uniform pattern. The fine wood wool structure of the non-flammable Heraklith boards (Fire Classification A2) not only gives a visually attractive effect, but also significantly improves the acoustics in the car park because it is no longer dominated by echoing surfaces. The reverberations from banging car doors and hard clicking heels walking to the exit are effectively muffled. Wood wool can withstand the odd knock or two. On the ceiling right under the lower ground floor, 100-mm thick glass wool insulation boards have been fitted. The glass wool is made with formaldehyde-free ECOSE® Technology binder and it provides the necessary thermal insulation.