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How To Install LYSAGHT SPANDEK® cladding
This page contains basic instructions for the installation of a LYSAGHT SPANDEK® roof. For more information see Install LYSAGHT® Steel Roofing & Walling.
Please be aware that installation of steel cladding must be carried out by licensed tradespeople in some Australian states.
Fastening sheets to supports
LYSAGHT SPANDEK® is pierce-fixed to timber or steel supports. This means that fastener screws pass through the sheeting.
You can place screws for LYSAGHT SPANDEK® through the crests or in the valleys. To maximise watertightness, always place roof screws through the crests. For walling, you may use either crest- or valley-fixing.
Always drive the screws perpendicular to the sheeting, and in the centre of the corrugation or rib.
Don't place fasteners less than 25 mm from the ends of sheets.
FASTENERS without insulation:
| Fixing to Steel up to 0.75 mm BMT | Fixing to Steel >0.75 to 3 mm BMT | Fixing to Timber | |
|---|---|---|---|
| Crest Fixed | Roofzips®* (M5.5-11x50) | Roofzips® (M5.5-11x50) | Roofzips® (M6-11x65) |
| Valley Fixed | Self drilling screws with hex. washer head and EPDM seal | Self drilling screws with hex. washer head and EPDM seal | Roofzips® (M6-11x65) |
| Side lap & accessories | Self drilling hex head screws with washer and EPDM seal. | 10-16x16 or EPDM seal: 8-15x15 |
*Note: Roofzips® are a registered trademark of ITW Buildex and are recommended for specific applications
† = Fasteners per sheet per support. Most common practice is: 3 fasteners for internal spans and 4 fasteners for single and end spans.
s = Side lap
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Side Laps
The edge of LYSAGHT SPANDEK® with the anti-capilliary groove is always the underlap. It is generally considered good practice to use fasteners along side-laps however, when cladding is supported as indicated in Maximum Support Spacings, side-lap fasteners are not usually needed for strength.
End Lapping
End-laps are not usually necessary because LYSAGHT SPANDEK® is available in long lengths.
If you want end-laps Contact Us for the sequence of laying and the amount of overlap.
Ends of Sheets
It is usual to allow roof sheets to overlap into gutters by about 50mm. If the roof pitch is less than 25° or extreme weather is expected, the valleys of sheets should be turned-down at lower ends, and turned-up at upper ends by about 80°.
Laying Procedure
For maximum weather tightness, start laying sheets from the end of the building that will be in the lee of the worst anticipated or prevailing weather.
It is much easier and safer to turn sheets on the ground than up on the roof.
Before lifting sheets on to the roof, check that they are the correct way up and the overlapping side is towards the edge of the roof from which installation will start.
Place bundles of sheets over or near firm supports, not at mid span of roof members.
Sheet-ends on Low Slopes
When LYAGHT SPANDEK® is laid on slopes of 5° or less, cut back the corner of the under-sheet, at the downhill end of the sheet, to block capilliary action.
Walking on Roofs
Generally, keep your weight evenly distributed over the soles of both feet to avoid concentrating your weight on either heels or toes. Always wear smooth soft-soled shoes; avoid ribbed soles that pick up and hold small stones, swarf and other objects.
Safety, Storage and Handling
Handling Safety - LYSAGHT® product may be sharp and heavy.
It is recommended that heavy-duty cut resistant gloves and appropriate manual handling techniques or a lifting plan be used when handling material.
Keep the product dry and clear of the ground. If stacked or bundled product becomes wet, separate it, wipe it with a clean cloth to dry thoroughly.
Handle materials carefully to avoid damage: don’t drag materials over rough surfaces or each other; don’t drag tools over material; protect from swarf.
Cutting
For cutting thin metal on site, we recommend a circular saw with a metal-cutting blade because it produces fewer damaging hot metal particles and leaves less resultant burr than a carborundum disc.
Cut materials over the ground and not over other materials.
Sweep all metallic swarf and other debris from roof areas and gutters at the end of each day and at the completion of the installation. Failure to do so can lead to surface staining when the metal particles rust.
Adverse Conditions
If this product is to be used in marine, severe industrial, or unusually corrosive environments, Contact Us to ask for advice.
Sealed Joints
For sealed joints use screws or rivets and neutral-cure sealant branded as suitable for use with galvanised or ZINCALUME® steel.
Metal and Timber Compatibility
Lead, copper, bare steel and green or some chemically treated timber are not compatible with this product; thus don't allow any contact of the product with those materials, nor discharge of rainwater from them onto the product. If there are doubts about the compatibility of products being used, Contact Us to ask for advice.
Maintenance
Optimum product life will be achieved if all external surfaces are washed regularly. Areas not cleaned by natural rainfall (such as the tops of walls sheltered by eaves) should be washed down every six months.
