The particular site where I needed to install this carport was a bit challenging. I only had one foot of clearance above the building, so I had to get creative in order to lock in the panels. In the end, I had to assemble the cover with the unit pulled out from the wall, then slide the entire carport into place. That maneuver was a little difficult, but with some modifications to the anchoring setup, it worked well. After completion, I am very satisfied with this product. It is an excellent carport for the money and appears to be built to last for many years.