Typical module specifications


Transportable module—suspended 100mm concrete slab and 22mm H3.1 strandfloor on timber sub flooring framing with 60mm expol underfloor insulation.

Site built option

Concrete slab on ground—fully insulated maxraft polystyrene pod system with integral slab edge insulation.


Decking – 140 x 19 Garapa hardwood stainless steel screw fixed or Outdure 140 x 25 recycled composite desk with a concealed clip system.


NZ pine 140mm H1.2 SG8 grade framing – FSC certified sustainably harvested.


Thermal walls—firth 20 series charcoal stackbond masonry block, solid filled, honed finish.

Beams and posts

NZ pine engineered Gluelam FSC certified—light weight, strong & efficient use of our sustainable wood resource. Stain finish. FSC certified.

Wall cladding

  • Vertical Shiplap BS Cedar on 40mm Pine cavity battens.
  • NZ Macrocarpa, NZ cedar or elements NZ Pine—Bevel Back Weatherboard on a 20mm drained cavity—board and batten on a 20mm drained cavity.
  • NZ Beech, Siberian Larch, Bevel Back Weatherboard

Feature walls

  • NZ pine plywood texture finish plywood sheet or firth NZ concrete masonry 100mm veneer.

Roof cladding

  • Rib profile flat pan metal roofing Endura Colorsteel finish in light colours to minimise summer overheating.
  • Asphalt shingles on 15mm plywood underlay.
  • Long run corrugated iron or profile metal roofing.

Soffit and spouting

  • Ecoply grooved soffit with endura colorsteel spouting. 


  • 2100 high to 2500 high aluminium double glazed, Foam sealed in place. NZ pine painted liners.
  • Low e glazing, NZ Maple beech liners.
  • Note: Toughened safety glass on all glazing below 1m in height, secure locks and catches on all ground floor windows and doors.

Paints, adhesives, oils and stains

  • Non-toxic low voc rated adhesives used.
  • Non-toxic Resene low voc paint systems. Resene cool colors for dark colors on external wall claddings, non-toxic oils and stains—Drydens wood oil or Natural House CO clear oils and stains.


Wall insulation
  • 140mm Mamoth R2.8. NZ made using 85% recycled plastic. Earth wool as standard/entry, Terralana Wool (HBL).
Roof insulation

225mm Mamoth R3.6, Terralana Wool (HBL).

Floor insulation
  • Under concrete slab—Maxraft 150mm thick polystyrene pod system R3.5
  • Under ACC concrete floor—Expol 60mm black EPS R1.8
Slabedge insulation

To concrete slab only—Maxraft 60mm polystyrene insulation.

Building wraps
  • Egger OS brace rap sheets as underlay and bracing.
  • Magnum board, Forever Breath System by *Health-Based Living.

Wall linings

  • 10mm Magnum board sheets to bedrooms and cupboards.
  • IBS Paneline MDF grooved sheets—Painted. No toxic glues.
  • Gib board.
  • NZ macrocarpa or cedar vertical Tongue and Groove. NZ Beech.

Air infiltration

  • * Forever Breath Magnum—board (BHL) lining to all walls and ceilings under the hard linings to prevent air leakage and increase thermal comfort.

Ceiling linings

10mm birch ply sheets to raking ceilings, 13mm Magnum board sheet to flat ceilings. Gib board.

Finishing timbers

  • NZ pine – paint finish.
  • NZ Macrocarpa – Oil finish.

Paints and stains

  • Low voc paint systems and non-toxic oils – Resene Enviropaints range, cool colours for dark colours on external wall claddings, non-toxic oils and stains – Drydens wood oil or Natural House CO clear oils and stains.


  • Overheight 2100 high x 860 wide minimum for improved passive heat transfer and to exceed accessible requirements – easy use lever handles fitted to all doors – glazed sliding wall panels to selected rooms for light transfer.

Floor coverings

  • Wood plank effect vinyl strip laminate.
  • NZ wool carpet—Environmental choice approved.
  • Exposed concrete floor areas—ground and sealed finish.
  • Cork tile, Wood plank effect ceramic tile, Wood plank veneer.

Kitchen joinery

  • Melteca laminate as selected, 20mm engineered stone tops.
  • Organic waste—10-litre dual bin system for food waste in kitchen cabinetry.
  • Self-closing doors.
  • Large pantry and pull out pantry.
  • Twin sinks.
  • Super quiet extractor fan.


  • Overheight windows with high—low sash arrangement for natural cross ventilation.
  • Clothes drier and range hood vented to exterior.
  • Automatic extract fans in bathrooms vented to exterior.
  • Automatic sensor-controlled activators to selected sashes.

Space heating

  • High-efficiency Bosca Limit wood burning fire in the living room.
  • Central Heating NZ Hot water radiators and boiler.
  • Solar thermal storage in the concrete floor slab.
  • Hydronic radiant floor slab system—300 litre SS HWC stores water heated by air to water heat pump. Heat pump also heats all domestic hot water


  • Lighting—LED long life low energy use fittings.
  • Future proof smart house wiring.
  • Appliances—Bosch brush stainless, minimum 4 star rated low energy use.
  • Solar photovoltaic PV 2.0KW panel system—Grid connected. Option of 3.0—5.0KW systems if required.
  • Outdoor lighting fitted with integrated daylight and motion sensor controls.

Water conservation

  • All NZ made Methven tapware, low flow shower roses and controlled flush WC cisterns. Overflows fitted to all basins.
  • Dishwasher rated for minimum water usage.
Rainwater harvesting option
  • Rural site, rainwater storage—2 x 25000 litre buried concrete tank with stainless steel submersible pump to supply toilets, bath, shower and laundry.
  • Urban site, rainwater storage—1 x 10000 litre buried concrete tank with stainless steel submersible pump to supply toilets, bath, shower and laundry.

Water heating

250 litre solar-ready electric HWC.
Raxi boiler, by Central Heating NZ

  • Ecospring 300 litre external heat pump HWC.

Sanitary sewerage

  • Urban site—discharged to council sewer mains.
  • Rural site—discharged to aerated Eco wastewater treatment system.

Grey water recycling

  • Greywater collected in Ecoplus recycling unit and distributed to gardens for irrigation.

Fire protection

  • Hard wired smoke detectors within 3m of all sleeping spaces.
  • Viking domestic sprinkler system in all rooms.

Organic waste

  • External composting system—worm farm container.
  • Clothes Line—rotary line plus covered clothes drying area at the rear of the house.


  • 70% of land area vegetated with native plants—70% of site area permeable and designed to deal with stormwater runoff.


  • Permeable pavers or natural pebble paving in recycled PVC mat system.


  • Min 3m2 vegetable garden and four fruit trees planted.

NOTE: The available options are not limited to those listed above and can be customised to suit each owner’s exact requirements, site conditions and latest sustainable products and systems available.

Looking for a premium-quality, energy-efficient, architecturally designed transportable home?

Contact us to find out more about “Living the Greenhaven Way” 0800 777 175 or sales@greenhavenhomes.co.nz