Detail Flat Roof Drainage Design Guide

Design assistance services are offered as a courtesy to the roofing.

Detail flat roof drainage design guide.

Your building and location can help determine which drain will fit your roof needs. Details and technical drawings of the flat roof drainage as downloads in the practical pdf dxf and dwg formats. Poor drainage can lead to serious issues with flat roofing from leaks to structural damage. The drainage requirements for flat roofs on buildings present some special problems that we describe and illustrate here.

Main features flat roof drainage design guide first off the flat roof drainage design guide is an extremely basic direct and utilitarian design every single current trademark. The most critical of these issues is the flat roof drainage systems. Keep in mind all flat roofs have a slope of between five and 15 degrees to allow water to flow into drain systems such as eaves drainage holes or outlets. At page top and at left our photos show a low slope roof surrounded by a parapet.

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. Along with the benefits of a flat roof come unique challenges. According to bs 6229 bs 8217 flat roofs should be designed with minimum falls of 1 40 to ensure a finished fall of 1 80 can be achieved allowing for any inaccuracies in the construction. This information will teach you about thermal design insulation and consideration deck types fire performance wind load design falls and drainage locating equipment safe access assessing requirements improving drainage falls and improving thermal properties.

Drain locations and deck slope verification for ponding water or deflection. Flat roof drain types. Alwitra flat roof details. Roofs of this design will have one or more roof drains or scuppers installed.

It is a requirement of building regulation part h that adequate provision is made for rainwater to be carried from the roof of the building. All in all a flat roof offers many advantages for everyone. Roof drains zurn plumbing products groupspecification drainage operation 1801 pittsburgh avenue erie pa 16502 phone 814 455 0921 fax. There are roof coating products available if there isn t enough slant or slope to accomplish this.

Unlike other roofing types that are slanted or sloped to allow water to drain automatically flat roofs need a built in drainage system to help remove moisture and debris. Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally. The one challenge with flat roofing is ensuring proper drainage.