Green roof on a newly constructed canopy at Jahnplatz

The opening joint between the two asphalt surface layers of a roundabout allowed water to penetrate and caused lasting damage to the roadway in that area. A purely bituminous joint sealant was not an option, as it would be sheared out due to the high shear forces expected in the roundabout. Instead, the goal was to permanently fill a 6 cm wide and 4 cm deep milled strip—bonded to the asphalt edges—with a PMMA reprofiling mortar from Triflex.