Tools & Resources
Install LYSAGHT CUSTOM ORB® cladding
This page contains basic instructions for the installation of LYSAGHT CUSTOM ORB® Sheeting. For more information see Install LYSAGHT® Steel Roofing & Walling
Fastening sheets to supports
LYSAGHT CUSTOM ORB® is pierce-fixed to steel or timber supports. This means that fastener screws pass through the sheeting. 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 without insulation 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 | Self drilling, self tapping screws with hex. washer head and EPDM seal and shank guard | Self drilling, self tapping screws with hex. washer-head and EPDM seal & Shankguard | Type 17 screws with hex. washer-head & EPDM seal SOFTWOOD: 12-11 x 50 HARDWOOD: 12-11 x 40 |
| Valley Fixed | Self drilling, self tapping screws with hex. washer head and EPDM seal and shank guard | Self drilling, self tapping screws with hex. washer head and EPDM seal and shank guard | Type 17 screws with hex. washer-head & EPDM seal SOFTWOOD: 10-12x30 |
| Side lap & accessories | Needle point stitching screws with hex. washer-head & EPDM seal: 10-12x20 or Sealed blind rivets: 4.8mm diameter aluminium. | ||
Side-laps
LYSAGHT CUSTOM ORB® standard lap is 1.5 corrugations. 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.
End Lapping
End laps are not usually necessary because LYSAGHT CUSTOM ORB® is available in long lengths. If end laps are used, complete each run of sheets from gutter to ridge. Seal end lap at both ends with a 3mm bead of neutral cure silicone sealant.
For roofs, allow a minimum end-lap of 200mm for pitches of 5° to 15°, and 150mm for pitches above 15° degrees. For walls, allow minimum end laps of 100mm.
Where you intend to end-lap LYSAGHT CUSTOM ORB® and LYSAGHT CUSTOM BLUE ORB® order them at the same time to ensure a good fit.
Ends of sheets
It is usual to allow roof sheets to overlap into gutters by about 50mm. The valleys of sheets should be turned-down at lower ends, and turned-up at upper ends. Use five fastenings at the ends of sheets.
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.
Lay sheets toward 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.
Adverse Conditions
If this product is to be used in marine, severe industrial or unusually corrosive environments, Contact Us.
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 any doubts about the compatibility of other products being used, Contact Us.
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 does 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.
Sealed Joints
For sealed joints use screws or rivets and neutral-cure silicone sealant branded as suitable for use with galvanised or ZINCALUME® steel.
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.
