The ultrasonic welding technique also tends to decrease the diameter of the knot from its pre-fused diameter.

The nonwoven material is prebonded by a number of first spaced-apart bond sites to form first bonded and first unbonded areas.

To face such challenges, Combisafe pre-welded around 108 Anchor Sockets, which supported the system in each of the metre stone blocks, before the façade was actually assembled on site.