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Project Cost Estimator

Roof Frames, Insulation and Covering Construct

In NZ, the most common finish on roofs are corrugated zincalume steel roofing, trough zincalume steel, concrete tiles and decrabond steel tiles roofing. While the most common roof pitch is between 20 to 25 degrees. The costs estimates below are for a total construction of roofs from the timber frames right through to the roof covering. The cost estimates include the following:

Timber frames of up to 10m in overall span with trusses, purlins, ceiling joists, bracing and standard fascia
Fibreglass insulation to ceiling (no ceiling linings)
125mm zincalume eaves gutter, building paper, netting, battens (where required) and
Sheet roofing of 0.55mm thickness which is premium quality. Note: standard quality is 0.4mm thickness
Labour

Corrugated steel sheet roofing

This is the most common profile of roofing used in New Zealand. Zincalume steel (or zinc steel) is resistant to rusting and corrosion. The price of zinc steel is similar to Colour steel which is steel coated with paint.

Auck$ Wgtn$ Chch$ Dun$

Flat roof 162-182/m2 168-188/m2 168-188/m2 66-186/m2

20 deg pitch 194-204/m2 159-179/m2 159-179/m2 157-177/m2

25 deg pitch 181-201/m2 166-186/m2 166-186/m2 163-183/m2

30 deg pitch 190-210/m2 174-194/m2 174-194/m2 172-192/m2

Trough section profile zincalume steel sheet roofing

This profile is generally used in commercial buildings as even though the profile is plain, it can span a further distance for large roofs. This comes in Zincalume steel (or zinc steel) is resistant to rusting and corrosion or coloursteel. The price of zinc steel is similar to Colour steel which is steel coated with paint.

Auck$ Wgtn$ Chch$ Dun$

Flat roof 185-215/m2 180-200/m2 185-205/m2 180-200/m2

20 deg pitch 199-229/m2 184-214/m2 188-218/m2 184-214/m2

25 deg pitch 218-238/m2 201-221/m2 207-227/m2 201-221/m2

30 deg pitch 228-248/m2 211-231/m2 217-237/m2 211-231/m2

Tiles roofing - Concrete with a standard pattern

Auck$ Wgtn$ Chch$ Dun$

20 degr pitch 179-199/m2 181-201/m2 164-184/m2 179-199/m2

25 deg pitch 187-207/m2 189-209/m2 172-192/m2 187-207/m2

30 deg pitch 196-216/m2 198-218/m2 180- 200/m2 196-216/m2

Metal Tile roofing - plain coloursteel or stone chip coatings with acrylic finish.

These are press metal tiles whereby the tiles can be plain coloursteel or coated with a stone chip which provides it with a textured finish.

Auck/Wgtn/Chch/Dun

Up to 30 deg $65/m2

31-45 deg $68/m2

46 deg and over $70/m2

Insulation only

The cost to insulate the cavity between the roof and ceiling with fibreglass insulation such as pink batts is estimated to be $14-$16 per square metre.

Source: Rawlinsons New Zealand Construction Cost Handbook 2012

Note: Prices do not include GST

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Roof Covering on Existing Structure

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Metal Long Run Roofing - INSTALL

Metal Long Run Roofing - REMOVE & REPLACE

Metal Long Run Roofing - REPAIR

Copper Shingles Roof - INSTALL or REPLACE

Copper Shingles Roof - REPAIR

Roof Sealant or Painting - APPLY

Tile Roof - Concrete or Clay - INSTALL or REPLACE

Tile Roof - Metal - INSTALL or REPLACE

Tile Roof - PAINT

Tile Roof - REPAIR

Torch On Roofing Membrane (Bitumen) - INSTALL or REPLACE

Wood Shake or Composite Roof - REPAIR

Wood Shake or Composite Roofing - INSTALL or REPLACE

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Project Cost Estimator

Corrugated steel sheet roofing

Trough section profile zincalume steel sheet roofing

Tiles roofing - Concrete with a standard pattern

Metal Tile roofing - plain coloursteel or stone chip coatings with acrylic finish.

Insulation only

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