Install only as much insulation as can be covered by the completed roofing system by the end of the day. Surfaces shall be smooth, clean, dry and free from contaminants.
- Fit insulation neatly at all perimeters and penetrations with gaps and steps not to exceed 6mm. Voids greater than 6mm must be filled with insulation.
- Stagger end joints between boards. When installing multiple layers, offset joints between layers.
- Fasten the insulation where required with acceptable fastener assemblies.
- On metal decks, boards shall be laid with long edges at 90º to the deck troughs with end joints fully supported on the crowns.