The types of commercial roofs can basically be broken down into three types: Flat Roofs, Low-Sloped Roofs and Pitched Roofs. Flat roofs are the most common commercial roof, usually used for smaller structures and typically on the lowest end of the cost scale as they are the easiest and quickest type to build. Low-sloped roofs are typically used on large-scale buildings, are low cost and easy to install and repair. Pitched roofs have the best drainage and therefore are the least problematic but are the most expensive of these three. They are also the hardest and most expensive to repair.
The most commonly used materials for these roofs are:
1. Thermoplastic Roofing- extremely flexible and resistant
2. EPDM Roofing- incredibly easy to install, maintain and repair
3. Photovoltaic Solar Panels- converts light energy to electrical energy but expensive to install and maintain
4. Green Roofs- usually flat roofs covered in vegetation which absorbs heat and protects underlying roof
5. PVC Roofs- incredibly fire-resistant and even more beneficial than EPDM roofing