38 mm rib
Roofs from 1.5°- Seam
- Taller rib
- Panel widths
- 165, 265 and 465 mm
The deeper rib carries water at low pitch, which is what makes nail strip usable on a shallow roof plane.
System 08Roofing · Wall cladding · Soffits
Nailstrip
A screwed through rib in 25 mm and 38 mm profiles, in Colorbond and UniCote steel.
38mm
Seam height
Also made as a 25 mm profile
1.5°
Roof pitch from
With the 38 mm seam
300mm
Maximum fixing centres
Within 50 mm of each panel end
465mm
Widest panel
165, 265 and 465 mm at 38 mm. 192, 292 and 492 mm at 25 mm
The profile
One screw,
covered by the next panel.
Nail strip reads like a standing seam or a snap lock from the street, but fixes differently: the panel is screwed straight through concealed slotted holes in its own upstand, and the next panel covers them.
There are no clips and no seaming machine, which makes it the simplest of the seamed systems to install and the cheapest concealed fix system we roll. It comes in a 25 mm and a 38 mm rib, and only in Colorbond or UniCote steel.
SectionNail strip, 38 mm rib on plywood deckNot to scale
SectionNail strip, 25 mm rib on plywood deckNot to scale
- 01Nail strip rib38 mm or 25 mm from the base of the panel to the top of the rib
- 02Slotted fixingScrewed through concealed slotted holes so the panel can still move
- 03Panel165, 265 or 465 mm wide at 38 mm. 192, 292 or 492 mm at 25 mm
25 mm rib
Steeper roofs and walls- Seam
- Finer rib
- Panel widths
- 192, 292 and 492 mm
A slimmer line for walls and for roofs where pitch is not the constraint. The shallower rib buys back panel width, so each course covers more.
Why specify it
Five reasons architects
choose nailstrip.
From the setting out on the drawings to the warranty at handover, this is what the system gives a project.
01The simplest seamed system
No clips, no seaming machine, no specialist crew. The screw goes through the panel and the next panel hides it, which is why nail strip goes up faster than anything else we fold.
- 02
Nothing shows on the face
Every screw sits in the upstand and is covered by the panel beside it. From the street it reads as a standing seam.
03Down to 1.5 degrees
The 38 mm rib carries water at low pitch, so a shallow roof plane does not force a change of system.
04Economical in steel
The widths are set to use the coil fully, which keeps waste and cost down. In Colorbond and UniCote it is the cheapest concealed fix system we roll.
05Roof and wall
The same panel runs vertically or horizontally on a wall and straight onto a roof, so one profile covers the whole envelope.
Technical details
The layers
Nail strip is screwed straight to the substrate through its own upstand. These are our standard layers, from the outside in.
- 01Nail strip panelColorbond or UniCote steel, min. 0.55 mm
- 02Concealed fixingsThrough slotted holes at max. 300 mm centres, within 50 mm of each end
- 03Waterproof sarkingFully breathable and waterproof
- 04Structural plywood18 mm to AS 2269, or top hats in place of the ply
- 05Studs or top hatsContinuous, at max. 600 mm spacing
Structure and insulation are by others. Fixing spacing is confirmed for each project against the site’s wind loads.
Section through the wall layers. Not to scale.
Specification
by metal.
- Nail strip is rolled in Colorbond and UniCote steel only. It is not available in zinc, copper, aluminium or Corten.
- Rib height is measured from the base of the panel to the top of the rib.
- Panels run vertically or horizontally.
- Panel length: talk to us at design stage.
- For zinc, copper or aluminium, standing seam or snap lock gives you the same look in those metals.
| Metal | Thickness | Standard panel width |
|---|---|---|
 Colorbond steel | 0.55 mm | 38 mm rib165265465mm25 mm rib192292492mm |
 UniCote steel | 0.55 mm | 38 mm rib165265465mm25 mm rib192292492mm |
- Rib height
- 25 mm or 38 mm, base of panel to top of rib
- Panel width
- 165, 265 or 465 mm at 38 mm. 192, 292 or 492 mm at 25 mm
- Metals
- Colorbond or UniCote steel only
- Fixing
- Screwed through concealed slotted holes at max. 300 mm centres, within 50 mm of each end
- Substrate
- 18 mm structural plywood to AS 2269, or top hats, on studs at max. 600 mm
- Underlay
- Fully breathable and waterproof sarking
- Orientation
- Vertical and horizontal
- Applications
- Roofing, Wall cladding, Soffits
The slotted
fixing.
There is no clip. The panel is screwed straight through slotted holes in its own upstand, and the panel beside it covers the screw.
Fixings
Screwed through the slotted holes into the substrate, along every panel edge.
Max. 300 mm centres
End fixings
The first and last fixing sit close to the panel ends to hold it against wind uplift.
Within 50 mm of each end
Substrate
Structural plywood, or top hats in place of the ply, on continuous studs.
18 mm ply to AS 2269, supports at max. 600 mm
Details and
drawings.
Typical details for documentation. Select a drawing to view it full size, or download the full detail set.
Literature
3 documents
Full detail sets
Eaves, ridge, valley, parapet, corner, window and penetration details as PDF, with the manufacturer data behind them.
Browse the libraryHow we deliver nailstrip
- 01
Review
We check the drawings, exposure and buildability, and recommend the metal and gauge.
- 02
Shop drawings
Our drafters set out every pan, clip and junction for architect approval.
- 03
Fabrication
Panels are folded in our 2,000 m² Sydney workshop and QA checked before dispatch.
- 04
Installation
Our own crews install under a dedicated project manager, then hand over warranties.
Questions
8 answered
Nailstrip questions
The questions estimators and drafters answer most often. If yours is not here, send the drawings and we will answer it against your project.
Ask about your projectWhat is a nailstrip roof?
A concealed fix metal roof where each panel is screwed straight through slotted holes in its own upstand, and the next panel covers the screws. There are no clips and no seaming machine, which makes it the simplest of the seamed systems to install.
What is the difference between nailstrip and standing seam?
Appearance is close. The difference is the fixing: a standing seam sits on concealed clips and is folded closed on site, while nail strip is screwed through its own upstand. Nail strip is quicker and cheaper; standing seam handles lower pitches, curves and more complex junctions.
Does a screwed through system still allow for movement?
Yes, because the holes are slots rather than round holes. The screw holds the panel without pinning it, so the metal can expand and contract along its length.
What is the minimum pitch for nailstrip?
1.5° with the 38 mm rib. The 25 mm rib needs more pitch, which we confirm against the roof geometry at design stage.
How wide are nailstrip panels?
It depends on the rib. With the 38 mm rib the panels are 165, 265 or 465 mm wide. With the 25 mm rib they are 192, 292 or 492 mm. The shallower rib takes less metal out of the coil width, which is why those panels are wider.
Which metals suit nailstrip?
Colorbond or UniCote steel, and nothing else. The profile is not rolled in zinc, copper, aluminium or Corten. If you want a nail strip look in one of those metals, standing seam or snap lock gets you there.
What goes under nailstrip?
18 mm structural plywood to AS 2269, or top hats in place of the plywood, over a fully breathable waterproof sarking, on continuous studs or top hats at no more than 600 mm spacing.
Can nailstrip be used on walls?
Yes, vertically or horizontally, and it can run from the wall onto the roof as one profile.
Further reading
Nailstrip guides.
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