Test Report XC4002/R3 
Calculated declared thermal performance of Phenolic Foam Composite   
 
© CSIRO 2024 Final for issue 
Commercial-in-Confidence 
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Client 
Delta Panels P/L 
 
Reports XC4002/R1 and XC4002/R2 have characterized the declared thermal resistance of Phenolic 
Foam Composite at the low and high ends of the thickness range with results that are summarized 
in Table 1. 
Table 1.  Declared thermal performance of Phenolic Foam Composite Panels 
 at 23°C mean temperature  
CSIRO Report 
Number 
Product Nominal 
Thickness (mm) 
Declared Thermal 
Resistance 
(m
2.K/W) 
Declared Thermal 
Conductivity 
(W/m.K) 
XC4002/R1 
50 
1.32 
0.039 
XC4002/R2 
200 
5.15 
0.039 
 
AS/NZS 4859.1 allows for interpolation and limited extrapolation at other thickness values to arrive 
at declared thermal values for these thicknesses.  Calculation is based on the highest declared 
value of thermal conductivity, the rounded value of which in this case is 0.039 W/m.K.  The client 
has provided a list of alternative thickness values for which the following declared thermal 
resistance values have been calculated. 
Table 2.  Calculated declared thermal performance of Phenolic foam composite 
at 23°C mean temperature at intermediate thicknesses  
Product Nominal 
Thickness (mm) 
Calculated Declared 
Thermal Resistance 
(m
2.K/W) 
 
Product Nominal 
Thickness (mm) 
Calculated Declared 
Thermal Resistance 
(m
2.K/W) 
60 
1.55 
 
100 
2.55 
70 
1.80 
 
110 
2.85 
75 
1.90 
 
125 
3.20 
80 
2.07 
 
150 
2.85 
90 
2.30 
 
175 
4.50 
 
The above calculations assume that all examples of the product meet or exceed the nominal 
thickness value and that the average density is also met or exceeded. 

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