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Tiling Battens

Tiling battens must be:
  • H1.1 boric treated when used in attic roof construction;
  • H1.2 treated when used in skillion roof construction;
  • Douglas fir with a moisture content of less than 20%;
  • KD Pinus Radiata with a moisture content of less than 18%;
  • a minimum of 50 mm x 40 mm for 900 mm rafter spacing; and
  • a minimum of 50 mm x 50 mm for 1200 mm spacing.
Copper preservative timbers must not be used with Zincalume coated tiles. Battens required for rafter spacings greater than 1200 mm must be specifically designed and be spaced to suit the tile module.
Battens at 370 mm centres must be fixed to the rafters or trusses over the underlay using fasteners to comply with Tables 10.1.5.A, B and

N.B. Battens at different centres may require different values.

 

Batten Installation

  • Battens must have square cut ends and must be butt jointed over the centre line of the rafter.
  • Adjacent rows of battens must not be joined on the same rafter and must span at least three rafter spacings at the roof edge.
  • A batten must be installed immediately behind the fascia as fixing for the eaves tiles.
  • Eaves tiles must overhang the gutter by a minimum of 30 mm.

Eaves tiles are recommended to overhang the gutter by 40 mm.

Because an eaves-tile batten is installed immediately behind the fascia the position of the next batten up the rafter will be less than that of the normal tile batten spacing. The position of this batten may vary depending on the pitch of the roof.

The edge of the roof should be taken as 20% of the roof width measured from the fascia, barge, hip or ridgeline, and will apply all around the periphery of each roof plane.

The batten layout is marked on the rafters by placing nails at the line of the batten fronts. The roofing underlay is laid over this, onto the rafters. The battens are then laid from the lowest part of the roof upwards, using the marker nails to locate the front edge of the batten. The marker nails are removed before the tiles are laid.

 
Clause: 
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Clause Number: 
15.3.1.5
/cop/other-products/pressed-metal-tiles#tiling-battens
Draft Clause: 
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