How To Install LYSAGHT TRIMDEK® cladding
This page contains basic instructions for the installation of roofing made from LYSAGHT TRIMDEK®. 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 TRIMDEK® profile is pierce-fixed to timber or steel supports. This means that fastener screws pass through the sheeting.
You can place screws for LYSAGHT TRIMDEK® through the crests or in the pans. To maximise watertightness, always place roof screws through the crests.
For walling, you may use either crest- or pan-fixing.
Always drive the screws perpendicular to the sheeting, and in the centre of the corrugation or rib. Don’t place fasteners less than 25mm from the ends of sheets.
Fasteners without insulation:
|
Fix to Steel | Fix to Steel Single & lapped steel thickness >1.0 mm BMT up to 3.0 BMT | Fix to Steel Total lapped steel thickness of >1.0 mm up to 3.8 mm BMT | Fixed to Timber Hardwood | Fixed to Timber Softwood | |
|---|---|---|---|---|---|
| Crest Fixed | RoofZips M6-11x50 |
12-14x45 Metal Teks HG, HH or AutoTeks M5.5-14x50 |
12-14x45, Metal Teks HG, HH or AutoTeks M5.5-14x50 |
12-11x50, Type 17 HG, HH or RoofZips M6-11x50 |
12-11x65, Type 17 HG, HH or RoofZips M6-11x65 |
| Pan Fixed |
10-16x16 Metal Teks,HH |
10-16x16, Metal Teks, HH |
10-16x16, Metal Teks, HH | 10-12x20,Type 17, HH or M5-16x25 Designer Head or RoofZips M6-11x25 |
10-12x30,Type 17, HH |
| Side laps (If required) 10-16x16, Metal Teks, HH or Roof Zips M6-11x25 or M5-16x25 Designer Head or Sealed blind rivet ø4.8mm aluminium | |||||
Notes:
- For other steel thicknesses not specified please seek advice from screw manufacturer.
- Values given are: gauge/threads per inch/ lengths (mm). HH = Hex. Head, WH = Wafer Head, HG = Hi-Grip
- Care is required during installation to prevent stripping of thin material. (Single ply.)
- Screw specification as above or equivalent fastener.
- All screws with EPDM sealing washer.
Side laps
The edge of LYSAGHT TRIMDEK® with the anti-capillary 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 TRIMDEK® is available in long lengths.
If you want end-laps, please Contact Us for advice on 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 pans of sheets should be turned down at lower ends, and turned up at upper ends by about 80°.
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 onto 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 LYSAGHT TRIMDEK® 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 capillary action.
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 timbers 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.
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.
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 where 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.
