Table 3.1 shows a number of different external wall configurations and identifies which satisfy the BCA requirement for Climate Zones 1 to 8. Table 3.2 lists the component R-Values used as a basis for Table 3.1. For more information on Hebel and energy efficiency refer to Section 3 and Appendix C and D of the Hebel Technical Manual.
Table 3.1: BCA Energy Efficiency Compliance
| Wall Configuration | Satisfies BCA Requirements | |||||||
| Climate Zone: | 1* | 2* | 3* | 4 | 5 | 6 | 7 | 8 |
| Class 1 & Class 10a Minimum R-Value: | 1.4 | 1.4 | 1.4 | 2.2 | 1.9 | 2.2 | 2.4 | 3.3 |
| 1. 250mm Block Only | Y | Y | Y | N | Y | N | N | N |
| 2. 250mm Block + 25mm Cavity | Y | Y | Y | Y | Y | Y | N | N |
| 3. 250mm Block + 25mm Cavity + Sarking | Y | Y | Y | Y | Y | Y | Y | N |
| 4. 250mm Block + 25mm Cavity + 75mm PowerPanel |
Y | Y | Y | Y | Y | Y | Y | N |
| 5. 250mm Block + 40mm Cavity + R1.0 Insulation |
Y | Y | Y | Y | Y | Y | Y | N |
| 6. 250mm Block + 25mm Cavity + Double Sided RFL + 25mm Cavity |
Y | Y | Y | Y | Y | Y | Y | Y |
| 7. 250mm Block + 90mm Cavity + R2.0 Insulation |
Y | Y | Y | Y | Y | Y | Y | Y |
Table 3.2: Wall Element R-Value
| System Number | Construction | Overall Thickness | R-Value | Rw | Rw+ Ctr |
|---|---|---|---|---|---|
| 401 | 8mm Render in Texture Coat and Paint 250mm Hebel PowerBlock 10mm Gyprock |
268 mm | 2.1 | 48 | 43 |
| 402 | 8mm Render in Texture Coat and Paint 250mm Hebel PowerBlock 28mm furring channels @600mm centres 10mm Gyprock |
296mm | 2.3 | 51 | 43 |
| 403 | 8mm Render in Texture Coat and Paint 250mm Hebel PowerBlock 28mm furring channels @600mm centres Non reflective (normal sarking) 10mm Gyprock |
296mm | 2.3 | 51 | 43 |
| 404 | 8mm Render in Texture Coat and Paint 250mm Hebel PowerBlock 28mm furring channels @600mm centres Reflective foil 10mm Gyprock |
296mm | 2.6 | 51 | 43 |
| 405 | 8mm Render in Texture Coat and Paint 250mm Hebel PowerBlock 28mm furring channels @600mm centres with 50mm 11kg – Bradford Glasswool Non reflective (sarking) 10mm Gyprock |
296mm | 3.1 | 53 | 44 |
| 406 | 8mm Render in Texture Coat and Paint 250mm Hebel PowerBlock 8mm Render in Texture Coat and Paint |
216mm | 2.1 | 48 | 43 |
