Project Description

VURBConstruction cost was reduced by keeping existing walls from new works (insulation). This was done by decreasing averaged U value from 4.0 to 2.0 and by adding 25% more insulation to the walls and 6% more insulation to the ceilings.

Existing dwelling (class 1a) is located in the city of Armadale. With new extension to the existing building, it consists of 2 levels with net conditioned area of 272m2.

Through VURB method we managed to keep the existing walls from new works (adding insulation).

Here are some more details on the degree of insulation and glazing thermal performance for the Armadale project:

Item NCC 2019 Reference Building Proposed Building
Floor No insulation added to the basement concrete slab on ground
R1.0 insulation added to slab edges.
No insulation added to the intermediate concrete floor,
No insulation added to the basement concrete slab on ground
R1.0 insulation added to slab edges.
R2.5 added to all new/existing suspended timber floor above the enclosed subfloor
R1.4 added to all new suspended Bondek concrete slabs above the enclosed subfloor
R1.4 added to the intermediate Bondek concrete floor,
Internal and common walls No insulation added to existing timber stud walls and the new walls adjacent to conditioned zones,
No insulation added to all new timber stud walls adjacent to unconditioned zones,
R2.24 added to the common walls between Class 10a and class 1 buildings
No insulation added to existing timber stud walls and the new walls adjacent to conditioned zones,
R1.0 added to all new timber stud walls adjacent to unconditioned zones,
R2.0 added to all internal dincel walls adjacent to unconditioned zones,
R2.0 added to Class 10a (garage) to class 1 building common walls,
External walls R2.24 added to the Class 1a masonry veneer with 110 mm thick masonry,
Solar absorbance: 0.6
No insulation added to the Class 10a masonry veneer with 110 mm thick masonry,
Solar absorbance: 0.6
No insulation added to the existing rendered double brick veneer walls,
Solar absorbance: 0.6
R2.8 added to the new/relined rendered brick veneer walls,
Solar absorbance: 0.6
R2.0 added to the dincel walls excluding garage, workshop, bath and laundry,
Solar absorbance: 0.6
No insulation added to the garage, workshop, bath and laundry external dincel walls,
Solar absorbance: 0.6
Roof/Ceiling R4.71 added to the pitched roof (23 degrees) with 2.4m high plasterboard ceiling
Solar absorbance: 0.6
No insulation added to the Class 10a roof
Solar absorbance: 0.6
R5.0 added to the new terra cotta-tiled cathedral roof
Solar absorbance: 0.9
R5.0 added to the flat ceiling of all skillion metal cladding roofs,
Solar absorbance: 0.43
R5.0 added to the flat ceiling of all new/existing terra cotta-tiled pitched roofs,
Solar absorbance: 0.9
R5.0 added to the flat ceiling of all existing corrugated metal sheet pitched roofs,
Solar absorbance: 0.73
No insulation added to the garage roof,
Solar absorbance: 0.6
External shading All external eaves and heritage trees have been incorporated into the analysis based on available drawings. New shading device to the dining west-facing glazing (W12) is proposed.
Glazing All Ground floor glazing:
U-Value: 5.91, SHGC: 0.75All upper floor glazing:
U-Value: 3.05, SHGC: 0.64
All north/south-facing windows:
U-Value: 2.01, SHGC: 0.64Dining west-facing window (W12):
U-Value: 2.01, SHGC: 0.64All east/west-facing windows:
U-Value: 2.0, SHGC: 0.31

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