Bargeboards should be positioned so that their lap is directly below the end lap of the sheeting, with the top end of each bargeboard close to the tail end of the sheet in the course above.
The bargeboard lap should be immediately downslope of the sheet lap.
The sheeting should extend as far as possible under the bargeboard to ensure a weatherproof junction is provided. If lap sealant is required for the sheets, the sealant should also be applied to the bargeboards.
Allow 25mm clearance between the wall and the bargeboard when the gable is brick or block. Fix both legs of the bargeboard at the purlin positions and intermediate fixings should be introduced as necessary to ensure that both wings of the bargeboards are fixed at 750mm maximum centres.*