Upstands and skirting
Roofing Handbook Information Sheet 21
Document Status
Withdrawn, Document not available for download
Supplement
Building Supplement
Series
Roofing Handbook Information Sheet
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.
History
Updated edition of the Roofing handbook published by the Flat Roofing Contractors Advisory Board which was renamed Flat Roofing Alliance.
Subjects
- Flat roofs
- Coverings and surface finishes
- Roofs
- Building structure
Publisher History
The Flat Roofing Alliance (FRA) was incorporated within The National Federation of Roofing Contractors (NFRC) in 2010. Previously, it has also been known as the Flat Roofing Contractors Advisory Board (FRCAB) and was the publisher of the Roofing Handbook.
Information
NBS
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
Accuris
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