The roof is usually out of site and most people don’t know about what can go wrong. These interactive roof maps walk you through different parts of the roof and problems that could come up. This is a Tar & Gravel Roof System. The most common issues that we see on roofs are highlighted. We hope this tool gives you a better understanding of one of the most important parts of your building. The roof represents five to seven percent of capital building costs, but covers 100% of the building. Preventing these roof issues with regular maintenance will help ensure the longevity of your investment.