Stratco Cooldek Roofing

Control the climate with the innovative Cooldek insulated roofing panel. Cooldek provides a roof, insulation and ceiling-like finish all-in-one!

It has superior spanning capabilities and outstanding cooling performance.

Control the climate with insulated Stratco Cooldek Roofing

Stratco Cooldek Roofing sheets are available in two ribbed profile finishes: CGI and Classic

Reduce heat and noise – Save money!

The insulating properties of Stratco Cooldek Roofing reduce heat from above on hot days, significantly increasing comfort levels under the roof.

Cooldek Roofing reduces noise from heavy rain and aids in keeping your home cool, reducing energy costs AND your carbon footprint.

Stratco Cooldek Roofing features a polystyrene core that is permanently bonded to a smooth, easy to clean, coloured steel underside, and a profiled, coloured steel topside.

Finish and colour options to suit your home

Choose from either the Cooldek Classic or the Cooldek CGI roofingprofiles.

For the underside, there is a choice of smooth or one of two ribbed profile finishes. These are available in white or a choice of high gloss colours.

Stratco Cooldek Roofing sheets have three underside finish options: smooth, silkline or v-groove

The topside colour choices include a wide range of colours to integrate your carport, pergola, verandah or patio into existing colour schemes.

There are three insulation thicknesses to choose from:

  • 50mm thick panels with an insulation rating (R value) of up to 1.6
  • 75mm thick panels with an insulation rating of up to 2.2
  • 100mm panels with an insulation rating of up to 2.8

Strong, sleek and easy to install

Exceptional strength allows Stratco Cooldek Roofing to span up to an impressive 7 metres.

Large spans reduce the number of beams and framework, creating an uncluttered, ceiling-like appearance.

Simple to install, Stratco Cooldek roofing has an inbuilt rebate to conceal electrical wiring for fans and light fittings.

Cooldek Technical Information


Cooldek Profile

Design Considerations

The minimum recommended roof pitch for “flat” verandahs shall be 2° (1 in 30) for Cooldek Classic panels and 3° (1 in 20) for Cooldek CGI panels. The maximum roof pitch for “flat” verandahs shall be 5° (1 in 12). Care must be taken to ensure the minimum roof pitch is maintained to avoid ponding of rainwater.

The roof is designed to withstand actions incidental to maintenance, roofs are not to be used for floor type activities.

The design contained within these span tables relate to wind classifications N1, N2, N3, and N4 applicable to Regions A and B. Stratco does not accept liability for any loss or damage suffered as a result of any errors in the interpretation or application of these span tables.

Material Specifications
Material Properties Cooldek Classic Cooldek CGI
Base Metal Thickness / Material Grade Top Skin 0.42mm / G550 0.42mm / G550
Bottom Skin 0.50mm / G300 0.50mm / G300
Mass (kg / linear metre) 50mm Panel 9.5 9.6
75mm Panel 9.8 9.9
100mm Panel 10.1 10.2
Width Coverage (mm) 1000 1000
Minimum Roof Pitch
Core Material SL Grade EPS (expanded polystyrene)
Thermal Conductivity 0.037 W/mK (0°C mean temperature)


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. Capacity tables are in limit state format.


The spans given in the ‘Single Spans’ table are determined for wind speeds for non-cyclonic areas. Indicated spans are suitable for ‘flat’ roof patios. Open freestanding unit spans can be taken from open three sides unless a wall, eaves or boundary exists within 500mm of two or more sides.

For Cooldek roofing in attached or freestanding domestic gable patio application, sheet spans shall not exceed those given for one or no open sides. Alternatively the ‘Wind Capacities’ table may be used to determine allowable single spans for any application.

Spans specified for units with three sides open are suitable for units considered ’empty under’ and not exceeding three metres in height (from ground or deck level). For units in which goods or materials stored under the roof are expected to block greater than 50% of any open side exposed to the wind spans are to be taken from open two sides.

For units with two open sides, spans are based on Cp,n=-1.0 while for units with only one or no open sides, Cp,n=-1.2. In all cases, relevant consideration has been given to local pressure.

Cooldek Profile

Note: The ‘Wind Capacities’ table provides allowable wind capacities for Cooldek in single span application for serviceability and strength limit states. The pressures given may be used by a suitably qualified engineer for any single span application ensuring appropriate fixing details are applied.

Single Spans – Domestic Patio Application

Single Spans – Domestic Patio Application (mm)
Open Sides Panel Thickness (mm) COOLDEK CLASSIC COOLDEK CGI
N1 (W28) N2 (W33) N3 (W41) N4 (W50) N1 (W28) N2 (W33) N3 (W41) N4 (W50)
Three 50 5400 5400 5400 4200 (3900) 5400 5400 5100 3900
75 6600 6600 6000 4800 (3900) 6600 6600 6000 4800 (3900)
100 7200 7200 6600 6000 7200 7200 6900 6000
Two 50 5400 5400 3900 3300 (2100) 5400 5100 3600 3000
75 6600 5500 4800 (4400) 3900 (2100) 6600 5700 4800 3900 (3000)
100 7200 6300 5400 (5400) 4100 (n/a) 7200 6600 5400 4100 (3500)
One/None or Gable Patio 50 5400 4500 3300 3000 (n/a) 5400 4500 3300 3000 (2000)
75 6000 4800 3900 (3300) 3300 (n/a) 6300 5100 3900 3300 (2100)
100 6900 5400 4200 (3100) 3600 (n/a) 7200 5700 4200 3600 (2400)

Maximum allowable 900mm deck overhang for 50 and 75mm panels and 1200mm for 100mm panels, except in wind classification N4 in which maximum allowable shall be 900mm. The cladding back span shall be no less than 1.5 times the deck overhang. If values are shown in brackets they represent the maximum allowable span if an overhang is used. For a side to be considered open, the full length of the side must be open.

Single Span Wind Capacities (kPa)

Single Span Wind Capacities (kPa)
Profile Panel Thickness (mm) Limit State Span (mm)
1800 2400 3000 3600 4200 4800 5400 6000 6600 7200
Classic 50 Serviceability 3.80 2.69 2.06 1.66 1.38 1.18 1.02
Strength 6.70 4.50 3.30 2.56 2.07 1.72 1.46
75 Serviceability 4.86 3.43 2.58 2.02 1.64 1.37 1.16 1.00
Strength 5.11 3.63 2.75 2.17 1.77 1.48 1.26 1.08
100 Serviceability 3.51 2.78 2.27 1.91 1.65 1.44 1.27 1.14
Strength 4.58 3.47 2.74 2.24 1.87 1.59 1.38 1.21
CGI 50 Serviceability 3.72 2.62 1.99 1.60 1.32 1.13 0.97
Strength 6.78 4.47 3.24 2.49 1.99 1.64 1.38
75 Serviceability 3.81 2.86 2.27 1.86 1.57 1.35 1.18 1.04
Strength 5.84 4.15 3.14 2.48 2.02 1.69 1.44 1.24
100 Serviceability 3.74 2.89 2.33 1.93 1.63 1.41 1.23 1.09
Strength 4.20 3.30 2.69 2.25 1.92 1.67 1.47 1.31

The values in all the above tables are for use with steel supports with a minimum thickness of 1.0mm BMT, G550, or timber supports with fixing details as specified below.

Walking on Cooldek

When walking on Cooldek roofing, it is recommended you walk over the support beam to avoid damage. Wear flat, rubber soled shoes and walk flat footed in the sheet pans for Classic, and with your weight spread over as many crests as possible for CGI. For carport and verandah applications, away from supports, crawl boards should be used to avoid damage during installation and maintenance.


The performance of Cooldek over time depends on its correct application and maintenance. Maintenance should be performed as often as is required to remove 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 Cooldek 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 Stratco “Selection, Use and Maintenance” brochure, for more detailed information about the correct use and maintenance of this product.