Roofing Handbook Information Sheet 22 Eaves and verges

Publication Year

1999

Document Status

Withdrawn

Abstract

There are fundamental principles of detail design which apply to all flat roofs, irrespective of the waterproofing material. Where the waterproofing is taken over the edge of a roof, either as a drip into an external gutter, or to form a weathering edge to a kerb, there should be a 75mm turndown of the waterproofing. On the gable ends of a roof, some form of edge upstand or check kerb should be provided to prevent blown water spilling over the edges. The height of check kerb required to prevent overspill will depend on the degree of exposure of the roof, the roof pitch and the shape of the upstand. A height of 50-75mm would normally be sufficient, and an angle of approximately 45° for the upstand face will avoid sharp changes in direction of the waterproofing. These minimum dimensions should never be overlooked. To illustrate the principles of detailing, this information sheet gives guidance for warm roof construction, using polyester based felts.

Document History

Updated edition of the Roofing handbook published by the Flat Roofing Contractors Advisory Board which was renamed Flat Roofing Alliance.

Publisher Information