On-Site Insight Edition 4 - 2010
2
a) Flat roof, skillion roof and cathedral ceiling — Ceiling lining under rafter Added insulation = 4.6 – 0.48 = R4.12 Added insulation = 4.6 – 0.38 = R4.22 Added insulation = 4.6 – 0.23 = R4.27 without sarking and with sarking R4.19 Added insulation = 4.6 – 0.39 = R4.21 and R4.39 for ventilated roof space d) Pitched roof with flat ceiling — Metal roof b) Flat roof, skillion roof and cathedral ceiling — Exposed rafters c) Pitched roof with flat ceiling — Tiled roof UNVENTILATED 0.48 UNVENTILATED 0.38 UNVENTILATED 0.41 UNVENTILATED 0.39 VENTILATED 0.23 VENTILATED 0.21 INSULATION REQUIREMENTS FOR ROOFS For Class 1 Residential Dwellings To Comply With The BCA 2010 DTS In Climate Zone 7, which covers the ACT, the direction of heat-flow is upwards. We have included some typical roof structures with an upper surface solar absorptance value of greater than 0.4, but not more than 0.6. We have included the required added insulation for the typical roof types which can be made up of sarking material and insulation. The required minimum insulation, based on the above criteria, is R4.6 less the allowance for the building elements. The Total R-Value of the roof and ceiling construction below is based on there being a roof space. If the roof space is filled, the roof space R-Value needs to be subtracted from the Total R-Value of the roof and ceiling materials. The Total R-Value of the unventilated roof and ceiling construction for tiled roofs are based on there being sarking-type material which would prevent ventilation of the roof space through the gaps in the roof tiles. EDITION 4-2010 Master Builders Association of the ACT 1 Iron Knob St, Fyshwick ACT 2609 PO Box 1211, Fyshwick ACT 2609 Tel: (02) 6247 2099 Fax: (02) 6249 8374 Email: [email protected] Web: www.mba.org.au MASTER BUILDERS EXECUTIVE COUNCIL President – Ross Barrett Treasurer – Simon Butt Commercial Builders Council Chair – Sam DeLorenzo Civil Contractors Council Chair – Peter Middleton Residential Builders Council Chair – Andrew Kerec Professional Consultants Council Chair – Hans Sommer Suppliers and Subcontractors Council Chair – Peter Fairburn MASTER BUILDERS MANAGEMENT TEAM Executive Director – John Miller Deputy Executive Director – Jerry Howard Director Industrial Relations – Mike Baldwin Senior Management Accountant – Louise MacCallum Senior Manager - Marketing & Membership Services – David Leitch MASTER BUILDERS GROUP TRAINING General Manager – Wendy Tengstrom
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Master Builders Association of the ACT newsletter
Transcript of On-Site Insight Edition 4 - 2010
1
(a) Flat roof, skillion roof and cathedral ceiling — Ceiling lining under rafter
Down 0.48
Unventilated
Up 0.36
(b) Flat roof, skillion roof and cathedral ceiling — Exposed rafters
Down 0.44
Unventilated
Up 0.38
Pitched roof with flat ceiling — Tiled roof Down 0.74 Ventilated
Up 0.23
Down 0.56
(c)
Unventilated
Up 0.41
(d) Pitched roof with flat ceiling — Metal roof Down 0.72
Ventilated
Up 0.21
Down 0.54
Unventilated
Up 0.39
1. The Total R-Value of the roof and ceiling construction in Figure 3.12.1.1 is based on there being a roof space. If the roof space is filled, the roof space R-Value needs to be subtracted from the Total R-Value of the roof and ceiling materials.
(a) Flat roof, skillion roof and cathedral ceiling — Ceiling lining under rafter
Down 0.48
Unventilated
Up 0.36
(b) Flat roof, skillion roof and cathedral ceiling — Exposed rafters
Down 0.44
Unventilated
Up 0.38
Pitched roof with flat ceiling — Tiled roof Down 0.74 Ventilated
Up 0.23
Down 0.56
(c)
Unventilated
Up 0.41
(d) Pitched roof with flat ceiling — Metal roof Down 0.72
Ventilated
Up 0.21
Down 0.54
Unventilated
Up 0.39
1. The Total R-Value of the roof and ceiling construction in Figure 3.12.1.1 is based on there being a roof space. If the roof space is filled, the roof space R-Value needs to be subtracted from the Total R-Value of the roof and ceiling materials.
(a) Flat roof, skillion roof and cathedral ceiling — Ceiling lining under rafter
Down 0.48
Unventilated
Up 0.36
(b) Flat roof, skillion roof and cathedral ceiling — Exposed rafters
Down 0.44
Unventilated
Up 0.38
Pitched roof with flat ceiling — Tiled roof Down 0.74 Ventilated
Up 0.23
Down 0.56
(c)
Unventilated
Up 0.41
(d) Pitched roof with flat ceiling — Metal roof Down 0.72
Ventilated
Up 0.21
Down 0.54
Unventilated
Up 0.39
1. The Total R-Value of the roof and ceiling construction in Figure 3.12.1.1 is based on there being a roof space. If the roof space is filled, the roof space R-Value needs to be subtracted from the Total R-Value of the roof and ceiling materials.
(a) Flat roof, skillion roof and cathedral ceiling — Ceiling lining under rafter
Down 0.48
Unventilated
Up 0.36
(b) Flat roof, skillion roof and cathedral ceiling — Exposed rafters
Down 0.44
Unventilated
Up 0.38
Pitched roof with flat ceiling — Tiled roof Down 0.74 Ventilated
Up 0.23
Down 0.56
(c)
Unventilated
Up 0.41
(d) Pitched roof with flat ceiling — Metal roof Down 0.72
Ventilated
Up 0.21
Down 0.54
Unventilated
Up 0.39
1. The Total R-Value of the roof and ceiling construction in Figure 3.12.1.1 is based on there being a roof space. If the roof space is filled, the roof space R-Value needs to be subtracted from the Total R-Value of the roof and ceiling materials.
a) Flat roof, skillion roof and cathedral ceiling — Ceiling lining under rafter
Added insulation = 4.6 – 0.48 = R4.12
Added insulation = 4.6 – 0.38 = R4.22
Added insulation = 4.6 – 0.23 = R4.27 without sarking and with sarking R4.19
Added insulation = 4.6 – 0.39 = R4.21 and R4.39 for ventilated roof space
d) Pitched roof with flat ceiling — Metal roofb) Flat roof, skillion roof and cathedral ceiling — Exposed rafters
c) Pitched roof with flat ceiling — Tiled roof
UNVENTILATED
0.48
UNVENTILATED
0.38
UNVENTILATED
0.41
UNVENTILATED
0.39
VENTILATED
0.23
VENTILATED
0.21
INSULATION REQUIREMENTS
FOR ROOFSFor Class 1 Residential Dwellings To
Comply With The BCA 2010 DTSIn Climate Zone 7, which covers the ACT, the direction of heat-flow is upwards. We have included some typical roof structures with an upper surface solar absorptance value of greater than 0.4, but not more than 0.6.
We have included the required added insulation for the typical roof types which can be made up of sarking material and insulation. The required
minimum insulation, based on the above criteria, is R4.6 less the allowance for the building elements.
The Total R-Value of the roof and ceiling construction below is based on there being a roof space. If the roof space is filled, the roof space R-Value needs to be subtracted from the Total R-Value of the roof and ceiling materials.
The Total R-Value of the unventilated roof and ceiling construction for tiled roofs are based on there being sarking-type material
which would prevent ventilation of the roof space through the gaps in the roof tiles.
Ed
ition
4-2010
Master Builders Association of the ACT1 Iron Knob St, Fyshwick ACT 2609PO Box 1211, Fyshwick ACT 2609
Tel: (02) 6247 2099Fax: (02) 6249 8374
Email: [email protected]: www.mba.org.au
MAsTEr BuildErs ExECuTivE CounCilPresident – Ross BarrettTreasurer – Simon ButtCommercial Builders Council Chair – Sam DeLorenzoCivil Contractors Council Chair – Peter MiddletonResidential Builders Council Chair – Andrew KerecProfessional Consultants Council Chair – Hans SommerSuppliers and Subcontractors Council Chair – Peter Fairburn
MAsTEr BuildErs MAnAgEMEnT TEAMExecutive Director – John MillerDeputy Executive Director – Jerry HowardDirector Industrial Relations – Mike BaldwinSenior Management Accountant – Louise MacCallumSenior Manager - Marketing & Membership Services – David Leitch
MAsTEr BuildErs group TrAining General Manager – Wendy Tengstrom
2
TOTAL R-VALUE FOR TYPICAL WALL CONSTRUCTION
External wall construction description
2. The Total R-Value of the unventilated roof and ceiling construction in Figure 3.12.1.1(c) for tiled roofs are based on there being sarking-type material which would prevent ventilation of the roof space through the gaps in the roof tiles.
Figure 3.12.1.3 TOTAL R-VALUE FOR TYPICAL WALL CONSTRUCTION External wall construction description
Total
R-
Value
(a) Weatherboard
0.48
(b) Fibre cement sheet
0.42
(c) Clay masonry veneer
0.56
(e) Cavity clay masonry
0.69
(f) Externally insulated clay masonry
0.53
(g) Autoclaved aerated concrete masonry
2.42
Added required insulation for some typical wall types Clay brick veneer R2.24 Weather board R2.32
Fibre cement sheet R2.38 Cavity clay masonry R2.11
(f) Externally insulated clay masonry
0.53
(g) Autoclaved aerated concrete masonry
2.42
Added required insulation for some typical wall types Clay brick veneer R2.24 Weather board R2.32
Fibre cement sheet R2.38 Cavity clay masonry R2.11
2. The Total R-Value of the unventilated roof and ceiling construction in Figure 3.12.1.1(c) for tiled roofs are based on there being sarking-type material which would prevent ventilation of the roof space through the gaps in the roof tiles.
Figure 3.12.1.3 TOTAL R-VALUE FOR TYPICAL WALL CONSTRUCTION External wall construction description
Total
R-
Value
(a) Weatherboard
0.48
(b) Fibre cement sheet
0.42
(c) Clay masonry veneer
0.56
(e) Cavity clay masonry
0.69
2. The Total R-Value of the unventilated roof and ceiling construction in Figure 3.12.1.1(c) for tiled roofs are based on there being sarking-type material which would prevent ventilation of the roof space through the gaps in the roof tiles.
Figure 3.12.1.3 TOTAL R-VALUE FOR TYPICAL WALL CONSTRUCTION External wall construction description
Total
R-
Value
(a) Weatherboard
0.48
(b) Fibre cement sheet
0.42
(c) Clay masonry veneer
0.56
(e) Cavity clay masonry
0.69
2. The Total R-Value of the unventilated roof and ceiling construction in Figure 3.12.1.1(c) for tiled roofs are based on there being sarking-type material which would prevent ventilation of the roof space through the gaps in the roof tiles.
Figure 3.12.1.3 TOTAL R-VALUE FOR TYPICAL WALL CONSTRUCTION External wall construction description
Total
R-
Value
(a) Weatherboard
0.48
(b) Fibre cement sheet
0.42
(c) Clay masonry veneer
0.56
(e) Cavity clay masonry
0.69
a) Weatherboard
e) Externally insulated clay masonry
f) Autoclaved aerated concrete masonry
b) Fibre cement sheet
c) Clay masonry veneer
d) Cavity clay masonry
Total R-Value
0.48
Total R-Value
0.69
Total R-Value
0.53
Total R-Value
2.42
Total R-Value
0.42
Total R-Value
0.56
Clay brick veneer R2.24
Weather board R2.32
Fibre cement sheet R2.38
Cavity clay masonry R2.11
AAC Masonry R0.38
Added required insulation for some typical wall types listed above
Note: Added insulation can be made up with sizlation, bulk insulation or any approved product with the specified R value
INSULATION REQUIREMENTS
FOR WALLSFor Class 1 Residential Dwellings To
Comply With The BCA 2010 DTS
