The roofing industry is fairly basic, and the variations between residential and commercial roofs are sometimes confusing. Most individuals believe that roofs are identical, but between a residential and a commercial roof, a roofing contractor recognizes that there are very special challenges. In terms of size and form, not only are the roofs themselves different, but the materials used are very different as well. more info here
Challenges for Industrial Roof
The slope, or lack thereof, is the greatest challenge presented by a commercial roof. There are flat roofs in many commercial buildings, which is a big problem for water drainage. If the water is not properly drained, it can collect and cause substantial water damage and mold problems. There is also a greater surface area for commercial buildings than the typical home, making it more difficult to maintain over time.
Commercial materials are very special and in terms of practice, not much has changed over the years, but the composition of materials has evolved. In the past, commercial roofs used to be covered with a hot tar material that by melting it with a hot tar, effectively adhered to fabric layers. In general, these materials were water proof and moderately robust. This technique has however, developed over time to involve the use of a more versatile rubber like substance applied in layers. To help cover the roof, some of the newer techniques might also add a layer of gravel over the top. A kind of roof coating that is used to improve insulation and energy efficiency is the greatest development in commercial materials. Many of these coatings will save old materials and remove the need for full roof repair, usually added to the top of an existing structure using layering or even spray foam.