Roof performance varies between the different systems, however the factors affecting the performance of your commercial roof are relatively the same. Your roof is valuable and you need something that will be reliable in the long-run to protect your assets. Chances are you’ll be staying in the same building for an extended period of time, so it’s important that your roof stays with you. In order to provide you with the 9 top factors that affect roof performance, we’ve split the article into a 2 part series. Below are the first 5 criteria.