B272-1973

Preface

This first edition of CSA Standard B272, Prefabricated Vent Flashings, covers exposed flashings used to effect a permanent weather seal between the vent stack of a drain, waste and vent system, and the adjoining horizontal or pitched roof.

This Standard was prepared by the Committee on Prefabricated DWV Vent Flashings under the jurisdiction of the Sectional Committee on Plumbing Products and Materials and was formally approved by these Committees.

Scope

1.1

This Standard covers the minimum requirements for prefabricated vent flashings used to effect a permanent weather seal between the vent pipe and the adjoining roof structure. On-site fabricated units are not included.

1.2

This Standard includes requirements for material, workmanship, strength and weather resistance. Methods of marking to indicate compliance with this Standard are also included.

1.3

Prefabricated vent flashings of construction other than that contemplated by this Standard shall be subjected to special investigation to determine that they comply with the intent.