I installed 16x6 area of procore on one garage wall. I also installed another 4x8 section on another wall. Since the first section required adjoining two 8 foot sections I decided to buy H trim as well. Installation was straightforward. Important to identify studs on each end and all studs between. Although the screws are self tapping I found that I had to predrill holes first. The trim is a little flimsy at the top and I had to glue the top edge to keep the top trim in place. The product performs very well. I would give five stars