Types of Inspections

During the processing of the building consent, we will determine what inspections will be necessary to enable us to be satisfied on reasonable grounds that compliance will be achieved. Each inspection will be listed, along with any documentation requirements for that particular inspection, on the issued Form 5 building consent.

Booking inspections

Please call 03 769 8600 to book each inspection. Grey District Council requires the applicant to provide at least two working days' notice prior to each required inspection.

Inspection types

Please note the following inspections are specific to Grey District Council:

Pre pour - foundation slab

Note: Grey District Council generally carry out the following three inspections, the exception being single pour floors and ribrafts, where they will be combined: 1) Foundation, 2) Waste pipes and 3) Slab.

• Book pre-pour inspections prior to booking concrete
• Confirm boundary peg locations and lot number
• Check building is sited as per consent plan
• Check FFL off datum
• Strip vegetation from building platform
• Excavate foundations - ensure foundations are plumb and level at base with all loose material removed
• Check firm bearing achieved
• Check consent documentation for special geotechnical or engineer requirements, including engineers inspections (site notes/PS4 may be required)
• Ensure foundation width and depth measurements are as specified
• Check reinforcing is installed as detailed including type, size, and spacing; ensure reinforcing is correctly lapped, and supported with adequate cover
• Fit waste sleeves, ensuring adequate grade is achieved
• Sub-floor ventilation locations
• DPM laid - lapped and taped at joins
• Slab thickenings in place as per consent, check truss plan
• Free joint in place if required
• Rebates in place
• Under slab insulation in place (if required)
• Waste pipes in position, correct number and location
• HWC copper relief pipe in place

Pre pour - piles

• Check location for standard, anchor and brace piles
• Check adequate pile depth, width or diameter is achieved
• If piles are driven, provide driving log and engineers certificate

Subfloor framing

• Correct pile size, treatment and height
• Bearer size, treatment and spacing
• Adequate bearing on piles
• Joist size, treatment, and spacing
• Solid blocking in place for brace panel hold downs
• Fixings - stainless steel (within 60mm of the ground or within sea spray zone) or galvanised
• Insulation in place, adequate access and ventilation
• DPM to ground if specified

Blockwork

• Correct type of block
• Correct number of courses
• Horizontal and vertical reinforcing tied and centred in block
• Clean outs in place, reinforcing tied
• Bond beam reinforcing as detailed, i.e. stirrups
• Control joints in place
• Temporary bracing or propping required
• Engineers inspection completed (if required)
• Engineers site notes and PS4 may be required

Pre-wrap

• All previous site instructions completed
• 'As Built' truss design approved by Council Check business processes
• Control cuts to slab completed
• Framing; correct grade, treatment and spacing
• DPC to plates
• Plate hold downs completed
• Frame connections complete
• Truss and rafter connections complete
• Purlin size, spacing and fixings as detailed
• Z nails to outriggers
• Roof bracing completed - including gable end/roof strap/roof plane and dragon ties
• Stud to top plate fixings completed
• Lintel hold downs and fixings completed
• Lintel sizes checked
• Post/beam connections completed
• Valley board in place - ends supported
• Brace hold downs completed. Locations checked
• Bracing ply completed with all fixings in place
• Bottom chord restraints in place
• Fire wall hold downs and solid blocking completed
• Engineers inspection completed, if required
• Engineers site notes and PS4 may be required

Pre-membrane

• Support framing in place, correct treatment and spacing
• Minimum fall achieved as shown in consent documents
• Ply substrate complete, H3.2 sheets staggered, angle fillet in place
• Stainless screw fixings in place at correct spacing
• Scuppers, outlets and overflow relief in place
• Drip edge in place

Post wrap

BUILDING WRAP

• All previous site instructions completed
• Correct building wrap selected - ie direct fix, cavity, metal framing or cladding; wrap must be approved for specific applications
• Wrap installation - wrap securely fastened with adequate lap
• Wrap returned into openings, adequate bottom plate cover achieved, wrap above rebates
• Slab edge protection completed - ie DPM/Mulseal
• Sill tapes in place - must be installed as per manufacturers installation details
• Thermal break in place (steel frame)
• Penetrations sealed through wrap/pipes/wires etc
• Wrap supported with blue banding to prevent insulation sagging
• Fire walls - correct linings installed to outer face

CAVITY BATTENS AND FLASHINGS

• Cavity battens in place - correct size, treatment and spacing set out as per cladding specifications
• Where H3.1 cavity battens and galvanised flashing/s are in contact ensure separation is provided, such as strips of heavy duty roof underlay
• Cavity closers in place
• Saddle Flashings
• Flashings
• All appropriate flashings/back flashings in place
• Head flashings in place - turn ups to ends, sealed to wrap
• Sill trays in place for direct fix claddings
• Back flashings in place at change of cladding junctions
• WANZ support bars - full length, level, fixing complete at required spacing
• AAC Cladding cavity system to be installed as per consent plans or amendment approved.

Half-high masonry

• Cavity - min 40mm achieved and no more than 75mm
• Cavity clean and clear of mortar
• Brickwork - max 20mm overhang at foundation (If overhang is greater than 20mm, a solution is required)
• Brick ties in place, spacing and fixings
• Weep holes in place, including columns at correct spacing
• Slip joints in place
• Minimum brick panel size achieved (230mm)
• Flashings in place - DPC jamb and sill flashing with 15mm minimum kick out
• Lintel bars, shelf angles in position with flashing tape or additional layer of wrap over
• WANZ support bars in place - full length, level, fixings completed. Galvanised or stainless steel
• All panels as close as possible to half high

Pre-plaster exterior

• All previous site instructions completed
• All panels in place, fixings complete
• Control joints in place as per manufacturers requirements
• Proprietary flashing systems completed to openings and cladding junctions
• Base of cladding flashings in place
• Clearances to cladding at apron flashings etc
• Penetrations sealed
• Reinforcing to cut panels primed
• Rebate coated with bituminous emulsion if required (check installation specifications)

Pre-line

• All previous instructions completed
• Exterior claddings completed including all roof flashings and penetrations (weather tight)
• Temporary weatherproofing may be required to garage doors, chimney caps etc.

INSULATION

Wall and ceiling insulation complete, snug fit, clearances to roof underlay; correct R value

AIR SEALS

• Complete to all openings including meter box and garage door jambs
• Window identification labels and safety glass labels in place
• Backing rod in place behind air seal to prevent over filling cavity
• Packers sealed over
• Silicone sealant in place to narrow gaps

PIPEWORK

• Pipework completed, clipped and lagged outside insulation
• Pressure tested. Pressure test statement required at final inspection
• Correct pipework size/runs/distance to HWC
• Solar pipework installed
• Gas pipework installed
• Wastes and vents in place

FRAMING

• Hold downs to bottom plates including all brace elements complete
• Flush boxes are 90mm minimum from brace panel edges
• Moisture content
• Ceiling battens - spacing and fixings
• Stiffeners in place to stud/pate penetrations over 35mm diameter
• Solid blocking for ceiling diaphragms - penetrations to be in middle third each way
• Metal angles in place to tiled showers fixed at 300mm centres
• Solid blocking to fire walls
• Fire wall penetrations suitably fire rated
• Dwangs in place above shower trays

Post line

• All previous site instructions completed
• Fire walls - appropriate linings and fixings completed as per system requirements
• Penetrations located as specified by manufacturer

Drainage

• Drain layers details and registration number available
• Storm water, sewer pipework laid in position and exposed with correct inspection point locations
• Adequate grade achieved
• Pipework supported, laid in chip or clean sand
• Sumps and soak holes need to be viewed under construction
• Water test on to sewer
• Primer used on glued joints
• Septic tank system and located as per consent, including the construction of the effluent bed
• As-laid plan accurately drawn

Heating appliance

Note: If an inbuilt heating unit is to be installed, we require a completed pre-installation inspection.

• Ensure fire being installed is as per consent
• Installation to be carried out in strict accordance with the manufacturer's instructions including:
• Hearth type and size
• Seismic restraints
• Unit clearances to combustibles
• Flue shielding
• Flue type, flue connections, spacers
• Ceiling penetrations as per flue system specifications
• Number of flues and clearances to combustibles
• Ceiling plate - ventilated?
• Flue/roof penetration - additional support, soaker flashings
• Flue height and support
• Wetback installation - HWC open vented
• Header/top up tank required to rural installations
• Smoke alarms in place
• Room/heating unit ventilation in place (if required)
• Installers sheet received

Final

A final inspection is carried out when all other listed inspections have been completed and passed, and all detail on approved consent documentation has been completed.

Sometimes, other than the final inspection, there will be inspections (including effluent field, heating unit and solar hot water system) which also need to be completed. Please ensure that these inspections are also booked in so additional time has been allocated. This assists us in distributing all of the inspection bookings.

This is the last opportunity the Council has to inspect the completed building and it is therefore important that all aspects of the building are complete. In order for the Council to carry out this inspection, the building must be completed to a standard where it has a good chance of passing. It is not designed to provide a list for the contract to compete!

Some of the following items are commonly identified as failed items at final inspection. These items should be checked by the contractor prior to inspection.

EXTERNAL

• Finished ground level, clearance to cladding
• Paved area levels/falls and storm water control completed
• Finished height of gully traps
• Storm water disposal complete - ie strip drains, sumps, down pipes
• Soffit/window/doors sealed
• Drain ventilation installed and flashed etc
• Mechanical vents complete
• Cladding/soffits painted
• Ventilation/weep holes in place to brick or stonework veneers
• Drainage venting to sewer completed
• Snow straps in place to spouting
• Vermin proofing completed, ie below garage door reveals and at cladding junctions
• Hot water cylinder relief drains terminating in a safe location
• 190mm maximum step down from door openings

INTERNAL

• Hot water must be on to check temperature
• HWC seismic restraints in place top/middle/bottom
• Smoke alarms to be in place
• Window manufacturers identification stickers in place for Safety glass
• Check that showers are not leaking by directing water to the corners
• Gas hob protection in place if required
• Ventilation to all rooms where hot water tap in place (scullery)
• Fixtures to be sealed to wall
• All plumbing work/fit off to be completed

ROOF SPACE

• Insulation to be tidy and cut neatly around all ducting
• Downlights are CA or IC rated - insulation cut around or concealed
• Downlight transformers above the insulation
• Mechanical vents - ducting to be connected
• Screw fixings missing purlins and at hips
• Vertical insulation supported

Sometimes it is necessary for specialist to conduct inspections or construction monitoring in addition to the inspections carried out by Council. If a specialist inspection is necessary you will be advised before the consent is granted and an agreement made on what this will cover. Typically these types of inspections involve having a geotechnical engineer confirm ground stability or having an aspect of specific structural design checked by a registered engineer.

Each building site is unique and will have its own individual requirements so it's important you read the documents and pay particular attention to any conditions listed on your building consent, construction documentation and advice notes. All consent documentation must be kept on site at all times. To help identify your particular site, please ensure adequate signage is in place, especially in remote or rural locations.

Information on inspection results is available here.

Glossary