AS 1736-1975

1 - AS 1736-1975 CODE FOR PLIABLE ROOF SARKING
4 - PREFACE
5 - CONTENTS
6 - SECTION 1. SCOPE, DEFINITIONS AND APPLICATION
6 - 1.1 SCOPE.
6 - 1.2 DEFINITIONS.
6 - 1.3 APPLICATION.
7 - SECTION 2. MATERIALS, SAMPLING AND TESTING
7 - 2.1 SARKING MEMBRANE.
7 - 2.1.1 Impermeability.
7 - 2.1.2 Shrinkage.
7 - 2.1.3 Flammability Index.
7 - 2.1.4 Width.
7 - 2.2 WIRE NETTING.
7 - 2.3 SAMPLING OF SARKING MEMBRANE.
8 - 2.4 TESTING.
9 - SECTION 3. SARKING
9 - 3.1 SARKING ON PURLINS AND RAFTERS SPACED NOT MORE THAN 600 mm CENTRES
9 - 3.2 SARKING ON PURLINS AND RAFTERS SPACED MORE THAN 600 mm CENTRES, AND ON LOW- SLOPE ROOFS.
9 - 3.2.1 General.
10 - 3.2.2 Where Spacing of Purlins and Rafters Exceeds 900 mm Centres.
10 - 3.3 TREATMENT AT EAVES.
10 - 3.4 TREATMENT OF VALLEYS.
10 - 3.5 TREATMENT OF RIDGES.
11 - APPENDIX A - METHOD OF TEST FOR IMPERMEABILITY OF SARKING MEMBRANES
11 - A1 APPARATUS.
11 - A2 TEST PIECES.
11 - A3 PROCEDURE.
12 - A4 OBSERVATION.
13 - APPENDIX B METHOD FOR DETERMINATION OF SHRINKAGE OF SARKING MEMBRANES
13 - B1 EQUIPMENT.
13 - B2 TEST PIECES.
13 - B3 PROCEDURE.
14 - B4 REPORT.

Deals with sarking membranes, mainly of bituminized paper composition, and their fixing in accordance with the requirements of lending bodies and the procedures adopted by roof tiling organizations. It specifies requirements for sarking materials, and describes methods to be followed to ensure an effective seal in a sarking membrane and to provide adequate safety for personnel when the membrane is used in conjunction with wide spacing of rafters or purlins. Appendices describe test methods for impermeability and shrinkage of the material.

This code lays down the properties required in pliable roof sarking membranes, and gives recommended rules for the installation of the membranes over rafters and purlins. It does not apply to sarking consisting of close boarding.

Available Superseded
Under Revision See DR 93184 - DR 93191