rokcore

rokcore thermal performance

Rokcore panels exhibit excellent thermal performance when used as a single system. In fact an 80mm panel will meet the thermal and fire performance requirements for most exterior walls in the new Building Code of Australia.

Thermal Performance of Rokcore Panels at 23^oC for Australia

R value (m²K/W)	Panel Thickness
Core Type	50mm	80mm	100mm	120mm	150mm	175mm	200mm	240mm
50C	R1.14	R1.81	R2.26	R2.69	R3.34	R3.86	R4.39	R5.21
50F	R1.05	R1.67	R2.08	R2.49	R3.11	R3.62	R4.12	R4.93
75C	R1.05	R1.68	R2.09	R2.49	R3.10	R3.60	R4.10	R4.88
75F	R1.05	R1.68	R2.09	R2.49	R3.10	R3.60	R4.10	R4.88

Thermal Transmittance of Rokcore Panels at 23^oC for Australia

U value (W/m²K)	Panel Thickness
Core Type	50mm	80mm	100mm	120mm	150mm	175mm	200mm	240mm
50C	0.8772	0.5510	0.4433	0.3716	0.2998	0.2588	0.2278	0.1921
50F	0.9560	0.5993	0.4803	0.4011	0.3218	0.2765	0.2425	0.2029
75C	0.9500	0.5970	0.4793	0.4009	0.3224	0.2776	0.2440	0.2048
75F	0.9500	0.5970	0.4793	0.4009	0.3224	0.2776	0.2440	0.2048

Please refer to the technical section for a full copy of BRANZ report.

Exhibit A: Typical Rokcore 50C 80mm wall system

		R
1	Outdoor air film (note 2)	0.04
2	80mm 50C Rokcore *	1.81
3	Indoor air film (note 3)	0.12
	Total R value	1.97

Reference : Draft Amendment 1 to AS/NZS 4859.1 : 2002 – Materials for the thermal insulation of buildings Part 1 : General Criteria and technical provisions

Notes :

1. Wall cavities assumed non ventilated as per reference clause K4.2 (b)

2. Thermal resistance air films on outdoor surfaces assumed to be R0.04 - assumes a wind speed of 3m/s as per reference clause K5 (a)

3. Thermal resistance for a vertical orientation wall, direction of heat flow horizontal with a high remittance surface assumed to be R0.12 as per reference Table K1.

* R value from BRANZ report TP1411 /1 and opinion report

Thermal performance of Rokcore Panel system Total R System (Exhibit A)

Core Type	Panel Thickness
	50mm	80mm	100mm	120mm	150mm	175mm	200mm	240mm
	Total R System m² K/W @23⁰C
50C	R1.30	R1.97	R2.42	R2.85	R3.50	R4.02	R4.55	R5.37
50F	R1.21	R1.83	R2.24	R2.65	R3.27	R3.78	R4.28	R5.09
75C	R1.21	R1.84	R2.25	R2.65	R3.26	R3.76	R4.26	R5.04
75F	R1.21	R1.84	R2.25	R2.65	R3.26	R3.76	R4.26	R5.04

Rokcore 80mm thick Panel Systems (all four core types) achieves a total R system of greater than 1.8. This exceeds the wall construction thermal requirement of the BCA for class 5–9 buildings for all climate zones excluding zone 8.

Exhibit B: A typical Rokcore 50C 80mm panel wall system complete with plasterboard

		R
1	Outdoor air film (note 2)	0.04
2	80mm 50C Rokcore *	1.81
3	35mm cavity air space	0.16
4	10mm plasterboard	0.06
5	Indoor air film (note 3)	0.12
	Total R value	2.19

Thermal performance of Rokcore Panel system Total R System (Exhibit B)

Core Type	Panel Thickness
	50mm	80mm	100mm	120mm	150mm	175mm	200mm	240mm
	Total R System m² K/W @23⁰C
50C	R1.52	R2.19	R2.64	R3.07	R3.72	R4.24	R4.77	R5.59
50F	R1.43	R2.05	R2.46	R2.87	R3.49	R4.00	R4.50	R5.31
75C	R1.43	R2.06	R2.47	R2.87	R3.48	R3.98	R4.48	R5.26
75F	R1.43	R2.06	R2.47	R2.87	R3.48	R3.98	R4.48	R5.26

Please refer to the technical section for a full copy of BRANZ report.

Thermal Performance of Rokcore Panels at 15^oC for New Zealand

R value (m²K/W)	Panel Thickness
Core Type	50mm	80mm	100mm	120mm	150mm	175mm	200mm	240mm
50C	R1.18	R1.87	R2.33	R2.78	R3.44	R3.99	R4.53	R5.37
50F	R1.08	R1.72	R2.15	R2.57	R3.21	R3.73	R4.26	R5.09
75C	R1.09	R1.73	R2.15	R2.57	R3.20	R3.72	R4.23	R5.04
75F	R1.09	R1.73	R2.15	R2.57	R3.20	R3.72	R4.23	R5.04

Thermal Transmittance of Rokcore Panels at 15^oC for New Zealand

U value (W/m²K)	Panel Thickness
Core Type	50mm	80mm	100mm	120mm	150mm	175mm	200mm	240mm
50C	0.8469	0.5339	0.4296	0.3600	0.2905	0.2507	0.2209	0.1862
50F	0.9264	0.5807	0.4654	0.3886	0.3118	0.2679	0.2350	0.1966
75C	0.9205	0.5785	0.4645	0.3885	0.3124	0.2690	0.2364	0.1984
75F	0.9205	0.5785	0.4645	0.3885	0.3124	0.2690	0.2364	0.1984

Please refer to the technical section for a full copy of BRANZ report.