Menu

Underlays

Permeable self-supporting underlay must be installed on all new roofs as specified in section 4.3. of this Code of Practice.
The underlay must be installed horizontally with a minimum overlap of 75mm.

The first length of underlay should be positioned so that it lays over the eave batten and the fascia, and into the gutter.

When pressed metal tiles are installed, the underlay is laid horizontally on top of the rafters before the battens are fixed, and so there is an air space between the underlay and the tiles, except at the eave.

 

Metal Tile Underlay

(optional caption)

 

Clause: 
015_003_001_003_000_000_000_000_000
Clause Number: 
15.3.1.3
/cop/other-products/pressed-metal-tiles#underlays
Draft Clause: 
014_003_001_003_000_000_000_000_000