Types of building inspections

Types of inspections

There are many different types of inspections that are required during construction. Some of the more common ones are explained below.

Foundation

Foundation inspection

Foundations are inspected prior to concrete being poured. The inspector will verify the siting and the design of the foundation trench including reinforcing and width. Bearing conditions will be confirmed as acceptable. Waste pipe sleeves should also be installed at this stage. 

Slab

Floor slab inspection

Floor slabs are inspected prior to pouring of concrete. The inspector will confirm that the construction of the slab is in accordance with the approved plans, including polythene, tailings, load bearing points, waste pipes, and thickness etc.

Pre-roof structure

Pre-roof structure inspection

The pre-roof structure inspection is carried out prior to the roof being installed. It is a full structural check of the building including, bracing, fixings, bolting, etc.

Wrap

Wrap inspection

The wrap inspection is carried out prior to the installation of the windows. The inspector will check wrap type and installation, flexible flashing tape, banding etc. 

Mid-height cladding

Mid-height cladding inspection

At this inspection we will check the installation of the cladding part way through the progress. Items like cavity, vermin control, timber treatment, fixing of the cladding, window support etc. will be checked. 

Mid-height brickwork

Mid-height brickwork inspection

This is where we look at the brickwork part-installed. You should have your brickwork installed to half high around your building. We will check items like cavity size, brick ties, ventilation/weep holes, window support and flashings etc.

Preline

Preline inspection

This is an inspection carried out prior to lining of the building. We will check framing and bracing lengths, insulation, plumbing, air seals etc.

Prestop

Prestop inspection

A prestop inspection is carried out prior to start of interior plastering. At this stage we will be looking at lining materials used, shower linings, fixing of brace elements etc.  

Shower and bath tanking

Shower tanking inspection

A shower tanking inspection is carried out after the waterproofing or tanking product is installed prior to installing the tiles. We will be looking at the slope to the floor and that the product is installed to the manufacturer's specifications. 

Drains

Drainage inspection

The drainage inspection is done prior to backfilling of the drains. We will be verifying items like drain grade, size, bedding, and lateral connections or outfalls. The certifying drainlayer should have a water test on by the time the inspector arrives on-site.  

Effluent field

Effluent field

The effluent field needs to be inspected prior to backfilling with topsoil or during the time of installation for dripper line designs (as shown in the photo). The inspector will verify the design of the effluent field matches that on the approved plans. They will also check that the siting of the field at this stage.

Heating unit

woodburner

You should have your woodburner inspected prior to lighting it up. The woodburner needs to be fully installed prior to inspection. The inspector will verify that the make and model is as per the approved consent. They will also verify the installation complies with the installation instructions and/or the NZ Standard. You will need to have the installer’s producer statement and form 6 ready for the inspector to pick up. Smoke detectors will also be checked at this time. 

Final inspection 

A final inspection should be booked in when the building is completed as per the approved plans. Everything that is shown on the approved plans must be complete by final inspection. The list below states the sorts of things that need to be completed prior to a final inspection (this is not an exhaustive list, but a guide.)

  • All wet areas finished, floor and wall linings, fixtures and fittings etc.
  • Gutters and downpipes are to be on 
  • Main vents and back vents
  • Decks (if on plans) and access into doors 
  • Drive in garage access
  • Effluent field fencing (rural sites)
  • Ducting to ventilation
  • Smoke detectors
  • Log burners
  • Cladding completed (including painting)
  • Plumbing and drainage
  • Hot water cylinder and lagging
  • Sumps
  • Insulation
  • Electrical
  • Water supply