Roofing & Walling

Home > About > Roofing Walling

PT NS Bluescope Lysaght Indonesia established since 1973 in Indonesia, has been manufacturing and supplying metalic coated and prepainted cladding and roofing accessories with the brand LYSAGHT. ZINCALUME steel base material consist of 43,5% Zinc, 55% Aluminium and 1,5% Silicon which combined provide an extremely durable product. The expected life of ZINCALUMES steel can be up to four time that galvanized coated steel in the same environment.

Clean COLORBOND” steel is prepainted material. Paint is applied to the ZINCALUME steel substrate in carefully controlled factory conditions, ensuring high finish and adhesion of the paint to the substrate, which provides total corrosion resistance.

General Information

State of the art testing methods have been used to determine the performance of LYSAGHT” Roofing & Walling. The Direct Pressure Testing Rig at BlueScope Lysaght’s NATA registered testing laboratory has been used to developed the limit state performance of the cladding. The Direct Pressure test rig offers much better modeling of wind load, compared to traditional air bag test methods.

The long, straight lengths of LYSAGHT Roofing & Walling can be lowered into place and easily aligned. Fixing is simple and fast.

All LYSAGHT” Roofing & Walling finishes have base steel G550 (550 Mpa minimum yield stress) and variable base metal thickness from 0.35 mm to 0.60 mm (according to product type). The standard ZINCALUME” steel finish conforms to AS 1397-G550-AZ150. The Clean COLORBOND pre-painted finish is applied over ZINCALUME steel, coating class AZ 150 (minimum average 150 g/m2 coating mass) and is accordance with AS 2728, “Pre-Paintedand Organic Film/ Metal Laminate Products”

The wide choice of colours and styles from BlueScope Lysaght Indonesia allows you to mix and match with ease.


In summer buildings get hot from the sun and we want to cool the inside: in winter we often heat the inside and want to avoid losing that heat.

Factors in controlling heat include:

  • the orientation of the building relative to the sun
  • external shading from trees or other buildings
  • design of the building, especially ventilation and sealing at doors and windows,
  • the colours and surface gloss of the cladding.

The first three factors are outside the scope of this book. Heat is absorbed into a sheet on one side, and some of that absorbed heat is re-radiated from the other side

  • Light-coloured or ‘shiny surfaces don’t absorb much heat, and they radiate little.
  • Dark-coloured or dull surfaces absorb a lot of heat, and they radiate a lot. This doesn’t stop you using darker claddings because you can use reflective foil laminate under the cladding.

Wind Capacities (KPA) - Limit State

Lysaght Flex Lox Wind Capacities (KPA)- Limit State

  1. Support must no be less than 1.5mm BMT
  2. The fastened diameter of the seam is 20 mm, tolerance should be within -0.7 – +0.3mm
  3.  Seaming up can be finished by twice fastening, first to diameter about 21-22 mm and then to the final size
  4.  Values provided here are the strength of ultimate wind capacities

Lysaght Klip Lox Optima – Wind Capacities (KPA) – Limit State

Lysaght Spandek  – Wind Capacities (KPA) – Limit State

Note :

  1. Serviceability limit state is based on deflection limit of : (span/120) + (Pitch/30)
  2. Strength limit state capacities are based on the failure load (ultimate capacity)
  3. The above pressures are applicable when the cladding is fixed to a minimum of 1.0 mm material thickness

Safety & Handling

Roof sheeting is delivered in strapped bundles and should not be allowed to get wet. Bundles should be stored clear of the ground and protected by waterproof covers. If bundles become wet, the sheets should be separated, wiped with a clean cloth and stacked allow air circulation and completes driying

Long lengths should be lifted using a spreader bar and fabric sling. Clean dry gloves should be used. The sheets should not be dragged over rough surfaces or each other. Care should also be taken to prevent tools dragging on the surface

When walking along the length of LYSAGHT Roofing & Walling, walk on at least to pans. When walking across the width of roof sheeting, especially overhangs, walk over or close to the roofing supports. Generally keep weight evenly distributed over the soles of the feet. Clean and soft soled shoes should be worn. Care should be taken with new sheets as the may be slippery.

All metallic swarf and other debris should be swept from the roof area and gutters regularly, at the end of the day and at the completion of the installation. Failure to do so can lead to surface staining as the metal particles oxidize.

As it is not practical to solder ZINCALUME steel, where sealed joints are required use screw or rivets and silicone sealant. Only sealants branded as suitable for use with galvanized or ZINCALUME steel should be used

Oil Canning is an inherent characteristic and not derect of standing seam profile, It is therefore not a cause for panel rejection.