Detail Flat Roof Drainage Design Guide

Your building and location can help determine which drain will fit your roof needs.

Detail flat roof drainage design guide.

Roof drains zurn plumbing products groupspecification drainage operation 1801 pittsburgh avenue erie pa 16502 phone 814 455 0921 fax. The most critical of these issues is the flat roof drainage systems. A correctly build flat roof will drain the rainwater quickly and effectively into the gutters without allowing water to collect in depressions and pond on the surface of the roof leading to the build up of silt deposits on the roof and stresses in the membrane when the water freezes a small amount of ponding is inevitable and it should not reduce the. Design assistance services are offered as a courtesy to the roofing.

Drain locations and deck slope verification for ponding water or deflection. Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs. In order to ensure a finished surface with zero fall a design fall of 1 80 should be used and a detailed structural analysis should account for construction tolerances settlement and for. Flat roofs are hard to replace.

The drain system in partially interior about one and half foot from walls it is a drain with a cage comes out from the roof inside the house immediatly we attached to drain metal with special 4 inch rubber with metal and srews to tighten the metal from the drain to rubber followed by. Flat roofs are nothing new nor are some of the proven materials that cover these often expansive roofs such as those found on factories warehouses big and small box stores apartment buildings large public structures and schools universities. A rooftop garden or additional outside living space are the top reasons people choose flat roofs. Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs.

Flat roof drainage. A flat roof s design is both efficient and economical. Developing the design criteria for a roof drainage plan that will perform with the roofing system to drain the roof is critical prior to the bid process and roof system installation. I have a big flat roof 2100 square feet new construction.

Since many roofing systems have not been in production for 20 years the designer should consider proven systems as a first step in obtaining roof design life. Roof system design life should be a starting point in the selection of roof systems. Flat roof design guide some bauder waterproofing systems are bba approved for use with zero falls but back falls are not acceptable and should be corrected. Most buildings utilize a minimum 20 year roof design life.