Preparation for assembly
Before you begin to assemble, choose a good, flat, stable surface to construct the pergola. Make sure that your assembly location is construction-ready and free of obstacles. If you are fixing your pergola to a wall, make sure that it is firm, flat, and even. When attached to a wall, make sure it has a gap of 1.5mm, per width of the pergola, between two walls to allow for expansion of the materials.