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Underlay

Permeable self-supporting underlay, complying with Underlay, must be installed on all new roofs.

 

Underlay is laid horizontally, directly to the rafters before the installation of the battens, creating an air gap between the underlay and the roof cladding. The exception is at the eaves, where it is laid over the eaves batten and the fascia. Horizontal underlay laps should have a minimum overlap of 75 mm.

Metal Tile Underlay

 

 

Clause: 
015_003_002_003_000_000_000_000_000
Clause Number: 
15.3.2.3
/cop/other-products/pressed-metal-tiles#underlay
Revision Category: 
2 - Editing and rearrangement
Revision Detail: 

This clause was edited as part of a comprehensive revision of Pressed Metal Tiles.

Draft Clause: 
014_003_001_003_000_000_000_000_000