There are several types of commercial roofing, but most of them are flat or low sloped, covered with membranes or metal.
Flat roofs are significantly more affordable than pitched roofs, but their lower price doesn`t mean they are less efficient. Actually, with all the advancements in the roofing industry, nowadays a flat roof properly installed and made from quality materials can last as long as a pitched roof. Their cost effectiveness comes from the fact that there is typically less sq. feet to be covered, thus less roofing materials will be used in the process. Besides, installation is easy and requires less labor.
Flat commercial roofs can be covered with different membranes (PVC, EPDM, TPO), as well as with bitumen and modified bitumen. Another option is built-up roofing, consisting in alternating several layers of bitumen, reinforcing fabric and adding a top layer of gravel or stone.
There are also commercial buildings with pitched roofs, and the most significant advantage they bring is less risk of ponding water that could lead to leaks and degradation.
Commercial metal retrofit roofing that experienced commercial roofing company can install represents a cost-effective way to renew your old metal roof. It does not cost as much as a metal roof replacement but it is very effective, greatly increases the lifespan of the roof and it is also eco-friendly.