Roofing Handbook Information Sheet 21 Upstands and skirting

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Withdrawn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. At all skirtings and upstands, the waterproofing must be carried at least 150mm, and preferably between 150mm and 250mm, above the level of the finished roof, to protect against rain splash-back. Where upstand heights exceed 250mm consideration should be given to mechanical fixing the waterproofing. Fixings should be large head galvanised clout nails or similar at maximum 75mm centres. These minimum dimensions should never be overlooked or compromised because of other conflicting demands such as appearance or cost. 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