NCC 2022 Volume One - Building Code of Australia Class 2 to 9 buildings
Search the National Construction Code editions
Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c

Filter

Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c

38

Specification 38 Spandrel panel thermal performance

Specification 38 Spandrel panel thermal performance

This Specification describes methods of determining the thermal performance of spandrel panels.

To detail how to calculate the thermal performance of spandrel panels.

Spandrel panels are deemed to have the thermal properties nominated in Table S38C2, where—

  1. Configuration 1 consists of—
    1. a thermally unbroken (bridged) frame; and
    2. a centre of spandrel panel consisting of—
      1. a single-glazed opaque or clear face; and
      2. a 100 mm air gap; and
      3. a 3 mm aluminium, 0.8 mm galvanised steel or zinc back pan; and
  2. Configuration 2 consists of—
    1. a thermally unbroken (bridged) frame; and
    2. a centre of spandrel panel consisting of—
      1. a double-glazed opaque face; and
      2. a 50 mm air gap; and
      3. a 3 mm aluminium, 0.8 mm galvanised steel or zinc back pan; and
  3. Configuration 3 consists of—
    1. a thermally broken (unbridged) frame; and
    2. a centre of spandrel panel consisting of—
      1. a double-glazed clear face; and
      2. a 50 mm air gap; and
      3. a 3 mm aluminium, 0.8 mm galvanised steel or zinc back pan; and
  4. Configuration 4 consists of—
    1. a thermally broken (unbridged) frame; and
    2. a centre of spandrel panel consisting of—
      1. a double-glazed low-e clear face; and
      2. a 50 mm air gap; and
      3. a 3 mm aluminium, 0.8 mm galvanised steel or zinc back pan.
Table S38C2 Achieved Total R-Value of spandrel panels
Type No insulation R0.5 insulation R1.0 insulation R1.5 insulation R2.0 insulation
Configuration 1 0.3 0.39 0.42 0.44 0.45
Configuration 2 0.35 0.41 0.43 0.44 0.45
Configuration 3 0.84 0.96 1.03 1.07 1.09
Configuration 4 0.91 1.00 1.05 1.09 1.11

To detail the R-Value considered to be achieved by common forms of spandrel panels.

S38C2 provides the R-Value of 4 different spandrel panel configurations, representing common forms of spandrel panel. Each configuration can be tailored with additional insulation as specified in Table S38C2.

(1) The Total system U-Value of a spandrel panel is determined in accordance with the following formula:

Usp=UcsAcs+ΣUesAes+ΣUfsAfsAcs+ΣAes+ΣΑfsMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyvamaaBa aaleaacaWGZbGaamiCaaqabaGccqGH9aqpdaWcaaqaaiaadwfadaWg aaWcbaGaam4yaiaadohaaeqaaOGaamyqamaaBaaaleaacaWGJbGaam 4CaaqabaGccqGHRaWkiiaacqWFJoWucaWGvbWaaSbaaSqaaiaadwga caWGZbaabeaakiaadgeadaWgaaWcbaGaamyzaiaadohaaeqaaOGaey 4kaSIae83OdmLaamyvamaaBaaaleaacaWGMbGaam4CaaqabaGccaWG bbWaaSbaaSqaaiaadAgacaWGZbaabeaaaOqaaiaadgeadaWgaaWcba Gaam4yaiaadohaaeqaaOGaey4kaSIae83OdmLaamyqamaaBaaaleaa caWGLbGaam4CaaqabaGccqGHRaWkcqWFJoWucqWFroqqdaWgaaWcba GaamOzaiaadohaaeqaaaaaaaa@5E22@

(2) In the formula at (1)—

  1. AcsMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqamaaBa aaleaacaWGJbGaam4Caaqabaaaaa@38C6@  
    = the area of the centre region of the spandrel panel; and
  2. AesMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqamaaBa aaleaacaWGLbGaam4Caaqabaaaaa@38C8@  
    = the area of the edge region of the spandrel panel, where the edge has a defined width of 127 mm; and
  3. AfsMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqamaaBa aaleaacaWGMbGaam4Caaqabaaaaa@38C9@  
    = the area of the frame region of the spandrel panel; and
  4. UcsMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyvamaaBa aaleaacaWGJbGaam4Caaqabaaaaa@38DA@  
    = the U-value of the centre region of the spandrel panel; and
  5. UesMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyvamaaBa aaleaacaWGLbGaam4Caaqabaaaaa@38DC@  
    = the U-value of the edge region of the spandrel panel, where the edge has a defined width of 127 mm; and
  6. UfsMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyvamaaBa aaleaacaWGMbGaam4Caaqabaaaaa@38DD@  
    = the U-value of the frame region of the spandrel panel; and
  7. UspMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyvamaaBa aaleaacaWGZbGaamiCaaqabaaaaa@38E7@  
    = the Total System U-Value of the spandrel panel.

To detail how to calculate the Total System R-Value of spandrel panels.

This method has been provided to enable the calculation of the Total System U-Value of less common forms of spandrel panels not covered in S38C2.