Snaplock/Astro – Roofing Group Pty Ltd

ZINC, COPPER, ALUMINIUM, COLORBOND, CORTEN & STAINLESS STEEL

SNAPLOCK FOR ROOFING, CLADDING & SOFFIT

Snaplock’s contemporary profile is well suited to modern architectural developments. Similar in appearance to Standing Seam, Snaplock’s simplified installation method doesn’t require specialist tools – making it a popular alternative for installers and builders who don’t have access to Standing Seam seam closing equipment. Snaplock panels are designed to “snap” together, offering low fuss installation.

The completed finish is smooth and uncluttered due to Snaplock’s innovative concealed fixing system. Snaplock is available in 25mm raised seam and 38mm raised seam.

SNAPLOCK/ASTRO BUILDUP

INSTALLATION

Snaplock pans are turned up at the ridge and down into gutters, particularly at low pitches when used in roofing applications. At each supporting member Snaplock clips are secured with two fasteners per clip. When fixing over insulation a roof spacer system is recommended.

Oil canning in zinc and copper Snaplock/Astro system can be reduced by adding an ENKAMAT mesh over waterproofing membrane. This will help to allow any condensation to pass through and dry out.

FEATURES & BENEFITS

Faster installation as no requirement for automatic or manual seam closing making it a good choice for more standard applications in both roofing and wall cladding.

Flat appearance with no stress added to the panels, requiring no seams to close, and the panel is subjected to less oil canning (particularly with the use of zinc and copper roofing panels).

Snap lock roofing is similar in appearance to that of standing seam with a wide tray and a neutral raised seam.

Ability to adapt to lower pitched roofs with a 38mm seam height accepting pitch down to 1.5 degrees.

Ideal for very long panels as snap lock panel fixing details allows for more expansion and contractions.

Usable for both snap lock metal roofing & wall cladding and ability to connect with continuous seam.

OUR EXPERTISE

We work closely with architects during the design stages to share our expertise on installation and technical details. From traditional to contemporary applications, our aluminium, zinc and copper roofing and cladding solutions are specified based on their durable, sustainable and virtually maintenance-free nature that need to withstand the elements and protect those within. Being corrosion resistant, non-combustible, architecturally appealing, their outstanding list of benefits just can’t be beaten.

MATERIALS

VMZINC

Composed of very high quality zinc (at least 99% pure) alloyed with copper and titanium to make it harder and stronger, increasing both mechanical and creep resistance.

Lifespan of 50–80 years, depending on exact location.

Continues to develop a natural protective layer (or patina) as it ages, self-repairing any marks and scratches throughout its lifetime.

COPPER

Lifespan of 70–100 years, depending on exact location.
As a result of surface oxidisation caused by weathering, copper forms a protective barrier (patina) that resists further corrosion and extends its life.
This results in ongoing colour changes depending on the environment – from blue-green to nut-brown.

ALUMINIUM

Superior quality aluminium, produced In Europe and available for use in all our panel systems.
Lifespan of 40–60 years, depending on exact location.
Pre-painted using a PVDF paint system, using at least two layers to produce a minimum paint thickness of 27 microns.
Can be used in areas without direct rainfall with no corroding or discolouring.

COLORBOND

Manufactured in Australia to Australian Standards (AS1397 and AS/NZS 2728) and tested in some of the harshest Australian conditions over the last 50 years, genuine COLORBOND® steel is far more than just ‘paint on steel’.

The COLORBOND® steel range has been developed to give great design versatility and to suit a wide range of environments. And the new COLORBOND® steel Matt range of colours create a softer, more subtle look that is both understated and contemporary.

The steel base is manufactured to meet relevant Australian Standards, ensuring strict adherence to the required grade and strength.

CORTEN

Often called “weathering steel”, Corten steel panels form a stable rust-like appearance if exposed to the weather for several years.
This protective surface layer, or patina, is produced by Corten’s metal panel chemical composition and produces anti-corrosive properties superior to many other structural steels.

INSTALLATION & TECH SPECS

MATERIAL

VMZINC

COPPER

ALUMINIUM

COLORBOND

CORTEN

THICKNESS

Minimum 0.7mm

Minimum 0.6mm

Minimum 0.7mm

Minimum 0.55mm

PANEL WIDTH

385mm-555mm

285mm-485mm

DIRECTION

Horizontal, Vertical, Diagonal

ROOF OR WALL STRUCTURE

Must consist of continuous roof or wall top hats (rafters or studs) at max 600mm spacing. Minimum 1.5 degree pitch required for roofing when 38mm seam used.

SUBSTRATE

For roofing 18mm plywood is required for zinc, copper and aluminium. It can be installed directly to battens at maximum 400mm centres when using narrower panels in colorbond. For cladding only top hats required at maximum 600mm centres.

UNDERLAY

Breathable waterproofing membrane for both roofing and cladding

FIXINGS

Snaplock clips installed at maximum 400mm distance. Clips to be min 0.4mm stainless steel.

VENTILATION

40mm continuous air gap must be beneath the plywood substrate for ventilation for all VMZINC installations. It is recommended to be used on all other metals when using plywood substrate.

DOWNLOADS

Metal cladding/roofing and especially lengthy flat-span sheet-metal panels often will exhibit waviness, commonly referred to as “oil-canning.” The degree of oil-canning and the appearance of the panels will vary depending on factors such as the length and colour of the panels, alloy, gauge, substrate condition and exposure to sunlight. Oil-canning pertains to aesthetics and not the performance of the panels and is not controlled by the contractor. The type of metal roofing panels specified can affect the degree of oil-canning. Roofing Group is not responsible for oil-canning or aesthetics. Oil-canning shall not be grounds to withhold payment or reject panels of the type specified. For more information please contact Roofing Group.