CP 143-5:1964

This standard CP 143-5:1964 Code of practice for sheet roof and wall coverings is classified in these ICS categories:

• 91.060.20 Roofs
• 91.060.10 Walls. Partitions. Façades

This Part of the Code deals with zinc roof covering and gives recommendations based on accepted good practice in the United Kingdom for laying zinc roofs on the Roll Cap System. In this system the sheets are fully supported and have their sides turned up against shaped wood rolls spaced to suit the width of the sheets. The rolls are covered with an independent capping which completes the joint. Joints between the ends of sheets are made either by means of drips or welts depending on the pitch, see Figure 1 and Figure 2.

Recommendations are given for the whole of the roof covering above the upper surface of the constructional base for both flat and pitched roofs.

Flashings and gutters are also dealt with in so far as they are integral parts of the roof covering.