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.

The most critical of these issues is the flat roof drainage systems. Along with the benefits of a flat roof come unique challenges. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. A flat roof s design is both efficient and economical.

Alwitra flat roof details. Drain locations and deck slope verification for ponding water or deflection. Roof system design life should be a starting point in the selection of roof systems. Details and technical drawings of the flat roof drainage as downloads in the practical pdf dxf and dwg formats.

Flat roofs are hard to replace. A rooftop garden or additional outside living space are the top reasons people choose flat roofs. 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. Design assistance services are offered as a courtesy to the roofing.

Most buildings utilize a minimum 20 year roof design life. 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. Roof drains zurn plumbing products groupspecification drainage operation 1801 pittsburgh avenue erie pa 16502 phone 814 455 0921 fax. 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.

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. This could mean flat roofs may not raise the same red flags they used to. 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.