has been added to your cart
View Cart

Prodek® Roofing


$22.37 LM
We can arrange installation.

About this product

Prodek is a strong, versatile, roof and wall cladding profile. Prodek suits a range of applications, from patios, carports and garages, to long length industrial roofing.

For trade and project quantity discounts:

Versatile Prodek Sheeting

A profile endowed with superior spanning ability and maximum weather protection.

The unique Prodek profile offers superior spanning ability, excellent water carrying capacity and impressive rigidity. Combine these advantages with a fast, easy pierced fixing installation and you have an economical profile that is ideal for use on industrial roofing.

Prodek is designed to provide maximum weather protection. The 50mm high rib on Prodek reduces the risk of wind driven rain entering the roof and ensures that water is channelled into the pan area of Prodek. It has a non-syphoning side lap which reduces the risk of moisture transfer between sheets due to capillary action, thus reducing the risk of roof leakage. In addition, turn up/down tools are available to assist in weatherproofing the end of the Prodek sheets.

Available Colours

Custom Made For Your Project

For lengths longer than 1.2 metres Prodek can be rolled to the specific length you require, provided satisfactory transport and handling facilities can be arranged. For lengths longer than ten metres, consult your nearest Stratco for advice on handling and transport.

Prodek is available in un-painted zinc/al, and in an attractive range of factory pre-painted colours. To give your roof a professional finish, painted self-drilling screws are available. Stratco offer a complete range of accessories and flashings for use with Prodek, and can provide professional advice on specific flashings.

Stratco supplied Prodek cladding to the large CEVA Logistics Warehouse in Victoria, click here to read the details.

Maintenance Requirements

The performance of Prodek over time depends on its correct application and maintenance. Maintenance should be performed as often as is required to remove any dirt, salt and pollutants. Where used in severely corrosive environments, cleaning should be performed more often. It is important that screws have the same life expectancy as the cladding you have specified.

Packs of Prodek should always be kept dry and stored above ground level while on site. If the sheets have become wet, they should be separated, wiped and placed in the open to dry.

Refer to the 'Stratco Selection, Use and Maintenance' brochure, for more detailed information about the correct use and maintenance of this product.

Ordering Prodek

Sheets are available custom cut, allowing you to minimise waste, and enhance your design options. Prodek is available in un-painted zinc/al, and in an attractive range of factory pre-painted colours. Subject to the delivery location, quantity and material availability, delivery is usually within 48 hours, or at an agreed time that suits your building schedule. Unless advised differently, a one tonne maximum is usually applied to larger packs.

Arrangements for unloading the truck are the responsibility of the customer, and should be arranged before ordering. When unloading you must ensure the load is adequately spread using spreaders and slings to prevent damage. If packs are to be loaded above structural members, they must be of sufficient strength, such as over portal frames, or braced roof trusses.


Material Specifications

Material Specifications
Material Properties 0.35mm BMT 0.42mm BMT 0.48mm BMT
Zinc/al Colour Zinc/al Colour Zinc/al Colour
Total Coated Thickness (mm) 0.40 0.43 0.47 0.50 0.53 0.56
Mass (kg/linear metre) 2.74 2.79 3.26 3.32 3.70 3.76
Mass (kg/square metre) 4.22 4.29 5.02 5.11 5.69 5.78
Yield (square metre tonne) 237.0 233.1 199.2 195.7 175.7 173.0
Tensile Strength (MPa) G550 G550 G550 G550 G550 G550
Width Coverage (mm) 650 650 650 650 650 650
Sheet Tolerances (mm) Length & Width ±5 ±2 ±5 ±2 ±5 ±2 ±5 ±2 ±5 ±2 ±5 ±2
Minimum Roof Pitch N/A N/A

Design Considerations

The minimum recommended roof pitch for Prodek is one degree (1 in 60). With a one degree fall, ensure that building settlement or the warping of timber structural sections does not cause ‘ponding’ on the surface of the roof. The 650mm coverage of Prodek provides easy handling and installation. Prodek roofing is subject to thermal expansion, particularly on darker colours. The maximum length before an expansion joint is required is 24 metres for lighter colours, and 16 metres for darker colours.


The Wind Capacity Tables are based on testing in accordance with AS1562.1-1992 and AS4040.0, 1 & 2-1992. Span tables have been developed by determining wind pressures in accordance with AS4055-2012 for domestic applications and AS/NZS 1170.2:2011 for all other applications. Capacity tables are in limit state format.


Spans are determined by wind speeds for non-cyclonic areas. For domestic applications, the pressures and spans are based on an eaves height not exceeding 6m, a roof pitch no greater than 35? and a total roof height of maximum 8.5m. For commercial and industrial applications, span tables are based on a maximum overall height of ten metres and a 500 year design return period.

Cladding Spans

Roofing calculations are based on Cpe=-0.9 and Cpi=0.2, walling is based on Cpe=-0.65 and Cpi=0.2. A local pressure factor, Kl=2.0 has been used for all roofing spans for both strength and serviceability limit states. Roof spans take into consideration loads incidental to maintenance.

All pressures have been determined assuming wind loading in any direction but which is not affected by topography. The following shielding factors, Ms, have been used for each of the terrain categories: Category 3 = 0.85, Category 2.5 = 0.95, and Category 2 = 1.

Domestic carport and verandah spans only apply to structures not enclosed by peripheral walls. Spans are based on Cpn=-0.9 and Kl=1.5 applied over the entire span, and are suitable for all span types. Loads on supporting purlins may limit these spans.

Stratco can provide additional engineering advice if any design parameters vary from those above.

Maximum Recommended Spans

Maximum Recommended Spans
Span Type Roofing BMT Walling BMT
0.42mm 0.48mm 0.35mm 0.42mm 0.48mm
Single Span 2600 3100 2400 3000 3600
End Span 2800 3400 2700 3500 4000
Internal Span 3200 3800 3000 3800 4200
Unstiffened Overhang 200 250 150 200 250
Stiffened Overhang 600 650 400 600 650

Roofing: Spans are limited based on typical maintenance foot traffic.
Walling: Spans are based on N1 (W28) wind loading.

Domestic Carport / Patio Spans

Domestic Carport / Verandah Spans (mm)
Wind Classification Base Metal Thickness
0.42mm 0.48mm
N1 (W28) 3700 4250
N2 (W33) 2950 3750
N3 (W41) 2200 3300
N4 (W50) 2050 3100

Prodek Spans

Prodek Spans (mm) - Determined by Wind Speeds for Non-Cyclonic Areas
Base Metal
Application Type of Span Wind Classification
N1 (W28) N2 (W33) N3 (W41) N4 (W50)
0.35mm Walling Single 2400 2350 1950 1600
End 2700 2700 2050 1800
Internal 3000 3000 2200 1800
0.42mm Roofing Single 2600 2050 1850 1550
End 2800 2500 1900 1550
Internal 3200 2750 2050 1650
Walling Single 3000 2700 2050 1800
End 3500 3100 2200 1800
Internal 3800 3400 2800 1950
0.48mm Roofing Single 3100 3100 2350 1850
End 3400 3400 2350 1850
Internal 3800 3800 2900 2000
Walling Single 3600 3600 3100 2200
End 4000 3900 3300 2200
Internal 4200 4200 3700 2500

Values are for use with steel supports with a minimum thickness of 0.95mm, G550.

Wind Load Conversion

For domestic applications use the appropriate wind classification for the area. To read the span tables for commercial and industrial applications, select the region and category for the area, then convert it to a wind classification using the table below.

Wind Load Conversion
Wind Classification (Domestic) Region and Category (Commercial / Industrial)
N1 (W28) Region A, Category 3
N2 (W33) Region A, Category 2.5 - Region B, Category 3
N3 (W41) Region A, Category 2 - Region B, Category 2.5
N4 (W50) Region B, Category 2

Wind Capacities

Wind Capacity (kPa)
BMT Span Limit State Span (mm)
1200 1500 1800 2100 2400 2700 3000 3300 3600 3900 4200 4500
0.35mm Single Serviceability 2.05 1.72 1.40 1.08 0.92 0.82 0.71 0.61 0.51 0.40 0.30 0.19
Strength 4.60 3.75 2.89 2.04 1.46 1.35 1.25 1.14 1.03 0.92 0.82 0.71
End Serviceability 2.46 2.12 1.77 1.42 1.08 0.97 0.86 0.75 0.64 0.53 0.42 0.31
Strength 5.38 4.46 3.54 2.23 1.69 1.58 1.47 1.36 1.25 1.14 1.03 0.92
Internal Serviceability 2.67 2.31 1.95 1.59 1.23 1.10 0.98 0.85 0.73 0.60 0.47 0.35
Strength 5.58 4.54 3.50 2.46 1.85 1.74 1.63 1.52 1.41 1.30 1.19 1.08
0.42mm Single Serviceability 3.23 2.54 1.85 1.15 1.04 0.93 0.82 0.70 0.59 0.48 0.42 0.37
Strength 6.08 4.87 3.67 2.46 2.31 2.16 2.01 1.87 1.72 1.57 1.42 1.27
End Serviceability 3.46 2.79 2.13 1.46 1.31 1.15 1.00 0.85 0.69 0.54 0.46 0.38
Strength 6.04 4.79 3.55 2.31 2.18 2.05 1.92 1.79 1.66 1.53 1.41 1.28
Internal Serviceability 4.08 3.42 2.75 2.09 1.43 1.28 1.13 0.98 0.83 0.68 0.65 0.63
Strength 6.35 5.18 4.01 2.85 2.64 2.43 2.22 2.01 1.79 1.58 1.50 1.42
0.48mm Single Serviceability 4.23 3.59 2.96 2.32 1.68 1.50 1.32 1.13 0.95 0.77 0.58 0.40
Strength 6.63 5.75 4.88 4.00 3.12 2.85 2.58 2.31 2.04 1.78 1.51 1.24
End Serviceability 4.62 3.96 3.31 2.65 2.00 1.79 1.58 1.37 1.16 0.95 0.74 0.53
Strength 6.54 5.63 4.71 3.79 2.87 2.67 2.46 2.26 2.06 1.85 1.65 1.44
Internal Serviceability 4.77 4.13 3.50 2.87 2.23 2.02 1.81 1.60 1.39 1.18 0.97 0.76
Strength 6.70 5.89 5.08 4.27 3.46 3.19 2.92 2.65 2.37 2.10 1.83 1.56

The values are for use with steel supports with a minimum thickness of 0.95mm, G550.

Water Carrying Capacity

Maximum Roof Run for Drainage (m)
Roof Slope Peak Rainfall Intensity (mm / hr)
150 180 200 250 300 350 400 450
319 266 239 191 159 137 119 106
452 377 339 271 226 193 169 150
554 461 415 332 271 237 207 184
716 596 537 429 358 307 268 238
7.5° 878 732 658 527 439 376 329 292
10° 1016 847 762 610 508 436 381 338

The peak rainfall intensities shown represent a 100 year average recurrence interval (ARI) for a five minute rainfall duration. If roof penetrations exist, the total roof run will generally be greater than the distance from ridge to eaves at the location the penetration interferes with the runoff. Contact Stratco if further advice is required.

Fixing Recommendations

Lay Prodek sheets into the prevailing wind. They should sit neatly on the preceding sheet, and be fixed at the recommended support spacings. Avoid ‘stretching’ the width of the sheet when installing, as this could allow wind and rain to enter. Flashing turn downs into the pan of Prodek should always be notched around the rib for maximum weather tightness. For spans between 1200mm and 3600mm, side lap fasteners are recommended for use at mid-span. For spans beyond 3600mm use two evenly spaced fasteners between supports to secure the side lap. Use either 8 x 12mm self drill stitching screws or 4.8mm sealed blind rivets. On roofing, at the end of the sheets, turn the pans up at the roof crest and down into the gutter using a turn up/down tool.

Roof Laying Procedure

Prevailing Wind →

← Laying Direction


Wall Laying Procedure

Prevailing Wind →

← Laying Direction


Fastener Selection

Fixing to Steel Roofing

12 x 68mm self drilling and tapping screw with neoprene washer


Fixing to Timber Roofing

14 x 90mm type 17 hex head screw with neoprene washer


Fixing to Steel Walling

10 x 16mm self drilling and tapping screw with neoprene washer


Fixing to Timber Walling

10 x 25m type 17 hex head screw with neoprene washer


If fixing over an insulation blanket the next screw length to that indicated may be required with minimum 25mm timber embedment to be maintained.

Walking on Prodek

When walking on Prodek roofing, it is recommended you walk over the purlins to avoid damage. Wear flat, rubber soled shoes and walk flat footed in the sheet pans only. For carport and verandah applications, crawl boards should be used to avoid damage during installation and maintenance.

Using Prodek

Stratco Prodek will have a long, useful life if used according to Stratco specifications. While roofing materials in outer urban and rural areas may have a life-span in excess of 30 years, this can reduce to only a few years in coastal and industrial environments.

Zinc/al and pre-painted steel should not be used in very aggressive areas such as near swimming pools and spas. It is important that dirt, soil, compost, paving sand, or other materials which retain moisture are not placed against steel sheeting. Concrete should not be poured against zinc/al material. Check with Stratco before using in these severe environments.

Incompatible Metals

The best way of reducing corrosion is to keep incompatible metals apart. Zinc/al and pre-painted steel cannot be used with lead, copper and monel. Galvanised steel and pure zinc material can be used with zinc/al, but you must avoid water run-off from zinc/al onto galvanised material. Fixings such as rivets and self-drilling screws must be compatible with the material they are fixing.

Handling and Cutting of Prodek

For safety, wear gloves when handling Prodek. Ensure your hands or gloves are clean, especially when handling zinc/al which can mark. Use a coloured pencil for marking steel, as lead or black pencils contain graphite which promotes rusting. Prodek is best cut using tin snips, but for larger cuts it may be necessary to use a power saw with a steel cutting blade or a power nibbler. Avoid using abrasive discs as they can cause burred edges and coating damage. Where possible cut sheets on the ground, and always clean off any swarf and metal filings progressively during the installation. Dispose of off-cuts carefully.

Insulation and Sealants

The use of blanket insulation is recommended in domestic roofing to assist in temperature, condensation and sound control. When using Prodek with insulation blanket, longer fasteners may be required and greater care is necessary when installing.

When choosing a silicone sealant, ensure it is suitable for roofing and guttering use and of a non-acetic, amine free, neutral cure type. Sealants that smell of ammonia, vinegar or lemons are not usually suitable.

Become a Super Saver

Change Location

Please enter a valid postcode