By Richard Fricklas, re-posted with permission from Buildings magazine.
For low-slope roofing systems, installation workmanship and attention to detail are critical to ensure that water drains off the roof expediently. Four inches of standing water on a roof can add 20 pounds of weight per square foot, which may exceed the load capacity of some roofs. Click here to read the entire article, in which noted roofing industry expert Dick Fricklas discusses water shedding and steps to take to ensure “positive drainage” on a low-slope roof, introducing the handy mnemonic, “ABCD” – Always Be Conscious of Drainage. Some technologies are best used during new construction; others can be added later if lack of drainage becomes an issue. Regardless of whether you’re constructing a new building or re-roofing an existing one, make sure your roofing contractor is experienced and well-versed in all aspects of commercial rooftop water management.