lysaght SpandeK® is a contemporary-looking, trapezoidal profile which is ideal where a stronger, bolder, more modern corrugated appearance is required. spandek was originally designed as a strong attractive roofing material for industrial and commercial construction - however spandek has proved equally popular for homes and public buildings, underlining its versatility and pleasing appearance.

Product Information

Lysaght Spandek®

• spandek can now be specified on roof pitches as low as 2º (1 in 30). details inside.

• Contemporary-looking, trapezoidal profile

which is ideal where a stronger, bolder, sharper corrugated appearance is required

• spandek combines strength with lightness, rigidity and economy.

• The long, straight lengths of spandek can be

lowered into place and easily aligned.

lysaght SpandeK®  is a contemporary-looking, trapezoidal profile which is ideal where a stronger, bolder, more modern corrugated appearance is required.

spandek  was originally designed as a strong attractive roofing material for industrial and commercial construction – however spandek  has proved equally popular for homes and public buildings, underlining its versatility and pleasing appearance.

spandek  combines strength  with lightness,  rigidity and economy.


  BMT (mm) kg/m kg/m2 m2/t
ZINCALUME®  steel  0.42 3.26 4.66 215
COLORBOND®   steel 0.42 3.32 4.74 211
ZINCALUME®  steel 0.48 3.7 5.29 189
COLORBOND®   steel 0.48 3.76 5.37 186


Material specifications

  • zinCalume®  aluminium/zinc alloy-coated steel complying with aS1397:2011 G550, az150 (550mPa minimum yield stress, 150g/m2 minimum coating mass
  •  COLORBOND® prepainted steel complying with AS/NZS 2728:Type 4, is made from zinc-aluminium alloy coated steel complying with AS1397-2001, G550 (550MPa minimum yield stress), AZ150 (150g/m2 minimum coating mass) or AZ200 (200g/m2 minimum coating mass), or
  • COLORBOND® prepainted steel complying with AS/NZS 2728:Type 6, is made from stainless steel complying with JIS G 4305, Grade 430 stainless steel, 430SS550. Subject to enquiry
  • The base metal thickness is 0.42mm or 0.48mm



spandek  is available in an attractive range of colours in Colorbond® pre-painted steel and in unpainted zinCalume®  aluminium/zinc alloy coated steel.

zinCalume®  steel provides a minimum of twice the life of conventional galvanised steel in the same environment.

The standard Colorbond®  steel offers a full range of contemporary colours suitable for all building projects. Colorbond®   metallic steel provides superior aesthetic qualities, and Colorbond®  ultra steel is intended for severe coastal or industrial environments.

both Colorbond®  metallic and ultra steel are available in a limited range of colours, and are available subject to enquiry.



Sheets are supplied custom cut.



length: + 0mm, – 15mm

Width: + 4mm, – 4mm



Maximum Support Spacings

The maximum recommended support spacings are based on testing in accordance with aS1562.1-1992, aS4040.1-1992 and aS4040.2-1992.

roof spans consider both resistance to wind pressure and light roof traffic (traffic arising from incidental maintenance). Wall spans consider resistance to wind pressure only.

The pressure considered is based on buildings up to 10m high in

region b, Terrain Category 3, ms=0.85, mi=1.0, mt=1.0 with the following assumptions made:



Cpi=+0.20, Cpe=-0.90,  Kl=2.0 for single  and end spans,  Kl=1.5 for internal spans.



Cpi=+0.20, Cpe=-0.65,  Kl=2.0 for single  spans,  Kl=1.5 for internal  spans.

These spacings may vary by serviceability and strength limit states

for particular projects.


New CoLorBond® steel with ThermaTech® technology

The next generation Colorbond®  steel incorporates ThermaTeCh®

technology, which provides a new level of thermal protection by absorbing less heat. average reduction in solar absorption across all standard colours is 5%.

now 14 of the 20 standard Colorbond®  steel colours are ‘medium to light’ under the baSiX colour classification, which means reflective foil at the roof may not be required. it also means a drop of roof insulation r-rating may be applicable.

Limit states wind pressures

spandek  offers the full benefits of the latest methods for modelling wind pressures. The Wind Pressure capacity table is determined by full scale tests conducted at blueScope lysaght’s naTa-registered testing laboratory, using the direct pressure-testing rig.

Testing was conducted in accordance with aS 1562.1—1992 design and installation of Sheet roof and Wall Cladding—metal, and

aS 4040.2:1992 resistance to Wind Pressure for non-cyclonic regions.

The pressure capacities for service-ability are based on a deflection limit of (span/120) + (maximum fastener  pitch/30).

The pressure capacities for strength have been determined by testing the cladding to failure (ultimate capacity).  These pressures are applicable when the cladding is fixed to a minimum of 1.0mm, G550 steel.

For material less than 1.0mm thick, seek advice from our information line.


Maximum roof lengths for drainage  measured  from ridge to gutter (m)

Penetrations will alter the flow of water on a roof. For assistance  in design of roofs with penetrations, please seek advice from our information line.

as with any low slope roof, particular care must be taken when setting the supports to prevent ponding.

For roof slopes down to 2º, a number of provisions and details will need to be adhered to. Please call your nearest  Service Centre for advice.


Sheet-ends on low slopes

When spandek  is laid on slopes of 5 degrees or less, cut back the corner of the under-sheet, at the downhill end of the sheet, to block capillary action.


Walking on roofs

always walk on or near the rafters. 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

adverse conditions

if this product is to be used in marine, severe industrial, or unusually corrosive environments, ask for advice from our information line.

Metal & 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, ask for advice from our information line.


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.


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.

Sealed joints

For sealed  joints use screws or rivets and neutral-cure silicone sealant branded as suitable for use with galvanised or zinCalume®  steel.

Non-cyclonic areas

The information in this brochure is suitable for use only in areas where a tropical cyclone is unlikely to occur as defined in aS 1170.2:2002.

For information on the use of lySaGhT products in cyclonic conditions, refer to the Cyclonic area design manual which is available by ringing

Fastening sheets to supports

SPANDEK is pierce-fixed to timber or steel supports. This means that

fastener screws pass through the sheeting.

you can place screws for spandek  through the crests or in the valleys.

To maximise watertightness, always place roof screws through the Scrests.  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 25mm from the ends of sheets.


The edge of spandek  with the anti-capillary groove is always the underlap (see figure) d on . it is generally considered good practice to use fasteners along side-laps howSever, when cladding is supported as indicated in maximum Support Spacings, side-lap fasteners are not usually needed for strength.

Fasteners  per sheet  per support. Most common practice is:

internal spans and 4 fasteners  for single and end spans. S = Side-lap

End Lapping

End-laps are not usually necessary because spandek  is available in long



if you want end-laps, seek advice from our information line 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. Please refer to the lySaGhT roofing & Walling installation manual for the appropriate end treatment of the 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. it is much easier and safer to turn sheets on the ground than up on theroof. 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.