James Hardie document
James Hardie Eaves and Soffits Technical Specification
The official James Hardie technical specification for eaves and soffit lining, covering the HardieFlex, Versilux, Villaboard and HardieGroove sheets used to line boxed, spanning and raked eaves over timber or steel framing. It covers sheet selection and thickness, framing and tolerances, fastener types and spacing, joints and flush jointing, curved lining and durability. Read it on this page or download the PDF.
What this covers
- Sheet Selection & Thickness
- Framing & Tolerances
- Fastener Types & Spacing
- Boxed, Spanning & Raked Eaves
- Joints & Flush Jointing
- Curved Lining & Durability
Applies to HardieFlex Sheet, HardieGroove Lining, Versilux Sheet and Villaboard Lining.
Key things to remember
The essentials from this guide, at a glance.
- HardieFlex eaves lining sheets are 4.5mm thick and factory trimmed to 450, 600 and 750mm widths to suit common eaves overhangs.
- Versilux lining comes in 4.5mm (bevel edge), 6mm and 9mm thicknesses in 1200mm width; use 6mm or 9mm Villaboard or 7.5mm v-grooved HardieGroove for a decorative soffit.
- Framing must be a minimum 38mm thick, and steel base metal thickness must be between 0.55mm and 1.6mm.
- Hand nail 4.5mm and 6mm sheets with 2.8x30mm fibre cement nails, and 9mm sheets with 2.8x40mm nails.
- Locate fasteners no less than 12mm from sheet edges and 50mm from corners, and never use adhesives to fix sheets to the frame.
- Do not fix sheets to the bottom chord of roof trusses; batten out first with battens or furring channels.
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This is the official James Hardie James Hardie Eaves and Soffits Technical Specification. Read it on this page or download the PDF. For the most current version, please confirm with James Hardie.