Most Arte Contract wallcoverings are delivered with the edges untrimmed. On installation they must be double cut. This is to say that the edges must still be removed. This is done by sticking the wallcovering on top of each other (taking the pattern into account) and cutting both lengths together using a double cutter. Remove the cut edges of both lengths and you have a perfect seam.
In our double-cutting instruction video we explain this step by step.