A professional pre-purchase building inspection can reveal important information about the condition of a property, but there is an equally important issue every Melbourne home buyer should understand:

A building inspector can only inspect areas that are reasonably and safely accessible at the time of the inspection.

Building inspections are primarily visual inspections. Inspectors do not normally remove walls, ceilings, flooring, fixed cabinetry or other building components simply to determine what may be concealed behind them.

There can also be significant restrictions within subfloors, roof spaces, roofs and occupied properties.

Understanding these limitations is important because an inaccessible area should never automatically be interpreted as an area where no defects exist.

What Is Reasonable Access During a Building Inspection?

The fact that an opening exists does not necessarily mean that every area beyond that opening can be safely or reasonably inspected.

An inspector needs to consider the actual conditions encountered at the property.

For example, a subfloor access opening may initially provide adequate entry, but once beneath the building the clearance may progressively reduce.

Heating ducts, plumbing, stored materials, damp ground, building debris and other obstacles may make further movement difficult or unsafe.

Similarly, an inspector may be able to enter a roof space but still be unable to inspect every section.

Roof pitch, ductwork, insulation, structural framing and limited crawl space can significantly restrict visibility and movement.

The important distinction is:

Being physically capable of entering an area does not necessarily mean that the entire area provides safe and reasonable access for inspection.

Subfloor Access Restrictions

Subfloors are particularly important in many older Melbourne homes.

They can also be among the most difficult areas to inspect thoroughly.

Restrictions may include:

• Low clearance between the ground and floor framing
• Heating and cooling ductwork
• Plumbing pipes
• Electrical services
• Insulation
• Stored materials
• Building debris
• Damp or muddy ground
• Standing water
• Restricted access openings
• Internal foundation walls
• Changes in ground level
• Timber or other obstructions
• Vermin contamination
• Unsafe conditions

An inspector may therefore be able to inspect one section of a subfloor while being unable to access another.

This distinction should be clearly identified in the inspection report.

Why Subfloor Restrictions Are Important

Some significant building and timber pest defects can occur beneath a property.

These may include:

• Deteriorated stumps
• Inadequately supported bearers
• Defective floor joists
• Timber decay
• Termite damage
• Borer damage
• Plumbing leakage
• Excessive moisture
• Poor ventilation
• Structural alterations
• Water entry
• Defective footing support

If ductwork prevents an inspector from reaching a particular section, defects within or beyond that restricted area may not be visible.

The same applies where clearance becomes too low for safe movement.

This does not mean a defect exists.

It means the condition of that particular inaccessible area cannot be fully determined by visual inspection.

That is an important difference.

What Should an Inspector Do When Subfloor Access Is Restricted?

A professional inspector should clearly record significant restrictions encountered during the inspection.

Where practical, this may include photographs showing:

• Low clearance
• Ductwork
• Insulation
• Stored materials
• Wet conditions
• Debris
• Pipes and services
• Restricted openings
• Other physical obstructions

The report should also identify that the restriction prevented or limited inspection of the affected area.

Simply stating “subfloor inspected” may not adequately explain what occurred if substantial areas could not be accessed.

A more informative report might state that the subfloor was inspected where safe and reasonable access was available, but sections were restricted by low clearance and ductwork.

Roof Space Access Restrictions

Roof spaces present a different set of challenges.

Even when a roof access hatch is available, the inspector may encounter:

• Low roof pitch
• Limited crawl space
• Air-conditioning ductwork
• Insulation
• Plumbing
• Electrical services
• Roof framing
• Stored belongings
• Alterations
• Difficult access points
• Fragile ceiling areas
• Unsafe conditions

Insulation is particularly important.

Modern roof spaces can contain substantial insulation that conceals ceiling joists, electrical components and sections of framing.

An inspector should not simply walk across insulation where the location of structural members cannot be safely determined.

A ceiling below may consist primarily of plasterboard and is not designed to support a person’s weight.

What Can Be Found Inside a Roof Space?

Where accessible, roof-space inspection can reveal defects that may not be visible from the rooms below.

These can include:

• Damaged rafters
• Defective roof framing
• Inadequate structural support
• Timber deterioration
• Termite or borer damage
• Water staining
• Roof leakage
• Defective connections
• Altered structural members
• Sagging
• Poorly executed previous repairs
• Moisture damage

This is why roof-space access restrictions should be clearly documented.

Roof Exterior Access

Inspecting the external roof can provide valuable information about the condition of tiles, metal roofing, flashings, valleys, gutters and other components.

However, accessing a roof is subject to safety considerations.

Factors that may prevent physical roof access include:

• Excessive roof height
• Double-storey construction
• Steep roof pitch
• Wet roofing
• Rain
• High winds
• Fragile roofing materials
• Damaged roof surfaces
• Unsafe ladder positioning
• Restricted access around the building
• Other conditions creating an unacceptable risk

No inspector should place themselves or other people at unnecessary risk simply to physically walk on a roof.

Using Drones for Roof Inspections

Technology has significantly improved the ability to inspect roofs that cannot safely be accessed.

Where conditions permit, a drone can provide valuable visual information about high-level and double-storey roofing.

A drone may assist with identifying:

• Broken roof tiles
• Deteriorated pointing
• Corrosion
• Defective flashings
• Blocked gutters
• Roof deterioration
• Damaged roof sheets
• Valley defects
• General roof condition

However, drone inspections also have limitations.

Heavy rain, high winds, restricted airspace, surrounding obstacles and other conditions may prevent safe drone operation.

A drone is therefore an extremely useful inspection tool, but it does not remove every possible limitation.

Wet Weather Can Affect an Inspection

Weather conditions at the time of an inspection can significantly influence what can reasonably and safely be inspected.

Rain can make:

• Roofs slippery
• External stairs slippery
• Paving unsafe
• Subfloors muddy
• Sloping sites hazardous
• Retaining wall areas difficult to access
• Vegetated areas difficult to inspect

Heavy rain may also restrict the inspector’s ability to differentiate between particular moisture conditions.

Some building defects can become more apparent during rain, while others may only become evident after prolonged dry or wet conditions.

A building inspection represents the condition of the property as observed at the time of inspection.

Conditions can subsequently change.

Furniture and Personal Belongings

Most pre-purchase inspections of established homes are undertaken while the property is occupied or furnished.

An inspector may encounter:

• Beds against walls
• Wardrobes containing clothing
• Storage boxes
• Cabinets
• Sofas
• Refrigerators
• Washing machines
• Rugs
• Carpet
• Shelving
• Stored goods
• Garage contents

These items can conceal sections of walls, floors and other building components.

A visual inspection does not normally involve emptying wardrobes, dismantling furniture, lifting fitted floor coverings or relocating substantial quantities of personal belongings.

Consequently, defects concealed behind these items may not be visible at the time of inspection.

Fixed Cabinetry and Concealed Areas

Kitchens, bathrooms, laundries and wardrobes contain numerous areas that cannot be directly inspected.

For example, building elements may be concealed behind:

• Kitchen cabinets
• Vanity units
• Wardrobes
• Wall tiles
• Shower linings
• Splashbacks
• Built-in furniture
• Wall linings
• Floor finishes

An inspector cannot see through these materials.

Moisture meters and thermal imaging equipment may assist in identifying unusual conditions, but these tools do not provide X-ray vision.

They should be used as additional inspection tools rather than being represented as a guarantee that concealed defects will always be detected.

Floor Coverings Can Conceal Defects

Carpets, rugs, floating floors, engineered timber flooring, vinyl and tiles can conceal the underlying floor structure.

An inspector may observe symptoms such as:

• Floor movement
• Unevenness
• Creaking
• Sponginess
• Moisture
• Localised deterioration

However, the exact condition beneath a fixed floor covering may not be visible without removing that covering.

Pre-purchase inspections are generally non-destructive, so this type of removal is not normally undertaken.

External Restrictions

External areas can also be significantly restricted.

Common examples include:

• Dense vegetation
• Garden beds
• Stored materials
• Sheds
• Decking
• Fences
• Retaining walls
• Limited side access
• Air-conditioning equipment
• Water tanks
• Raised ground levels
• Landscaping
• Climbing plants

Vegetation growing against a building is particularly relevant because it may conceal masonry cracking, deterioration, termite entry points and moisture-related defects.

Timber Retaining Walls

Timber retaining walls require careful consideration during a timber pest inspection.

Timber may be:

• In direct contact with soil
• Partially buried
• Concealed by vegetation
• Concealed by landscaping
• Inaccessible from one side
• Subject to prolonged moisture exposure

Only the exposed and reasonably accessible portions can be visually inspected.

Significant deterioration or timber pest damage may potentially exist within concealed sections.

Where conditions prevent adequate inspection and there are reasonable concerns, further investigation may be recommended.

Termites and Concealed Timber Pest Activity

Termites are concealed insects.

They may travel through soil, concealed building cavities, cracks and other hidden pathways.

A property may contain termite activity or timber pest damage that is not visible during a non-invasive inspection.

Potentially concealed locations include:

• Wall cavities
• Behind plasterboard
• Beneath flooring
• Behind cabinetry
• Inside concealed structural timbers
• Behind stored goods
• Within inaccessible subfloors
• Behind insulation
• Within concealed retaining wall components

A timber pest inspection can identify visible evidence and conditions conducive to termite activity within accessible areas.

It should not be interpreted as a guarantee that concealed termite activity or damage does not exist.

Moisture Testing and Thermal Imaging

Professional inspection equipment can significantly assist an experienced inspector.

Depending upon the inspection and conditions, equipment may include:

• Moisture meters
• Thermal imaging cameras
• Tapping equipment
• Drones
• Levels
• Other specialised inspection tools

For example, an elevated moisture reading around a shower wall may indicate that further investigation is warranted.

Thermal imaging may identify an unusual temperature pattern.

However, neither result automatically establishes the exact cause.

The inspector needs to interpret the information in conjunction with the visible condition of the property, construction method and surrounding evidence.

Visual Inspection Versus Invasive Inspection

This distinction is extremely important.

A normal pre-purchase building inspection is generally a visual and non-invasive inspection.

An invasive inspection is different.

It may involve activities such as:

• Removing wall linings
• Removing sections of flooring
• Removing skirting boards
• Removing access panels
• Removing fixed building components
• Opening cavities
• Removing other materials to expose concealed construction

These activities generally require appropriate authority from the property owner.

A prospective purchaser and their inspector should not simply start dismantling parts of somebody else’s property.

Where evidence or conditions create reasonable concern about a concealed area, the inspector may recommend obtaining permission for further or invasive investigation before the purchaser becomes legally committed to the property.

Restricted Access Does Not Mean No Defect Exists

This is perhaps the most important message for home buyers.

If an inspector cannot access an area, the inspector cannot confirm the condition of everything within that area.

For example:

“No visible termite damage was identified within the accessible portions of the subfloor”

does not have the same meaning as:

“There is no termite damage anywhere beneath the house.”

The second statement goes beyond what a visual inspection could reasonably establish where parts of the subfloor were inaccessible.

Good inspection reporting needs to make this distinction clear.

Inspectors Should Document Restrictions

Professional reporting should clearly identify significant limitations encountered during an inspection.

This can include:

SUBFLOOR – ACCESS RESTRICTED:
Low clearance and heating/cooling ductwork prevented full access to sections of the subfloor. Inspection was limited to areas where safe and reasonable access was available.

ROOF SPACE – ACCESS RESTRICTED:
Ductwork, insulation and low clearance restricted inspection of sections of the roof space.

ROOF EXTERIOR – ACCESS RESTRICTED:
Physical roof access was not undertaken due to height, weather, roof configuration or safety considerations. Alternative inspection methods should be identified where used.

Clear wording benefits both the purchaser and the inspector because it identifies exactly what could and could not reasonably be assessed.

Photographs Are Important

Where practical, inspectors should photograph significant access restrictions.

Photographs can demonstrate:

• How low the subfloor clearance was
• Where ductwork prevented further movement
• The extent of stored belongings
• Insulation restricting visibility
• Wet or muddy conditions
• Vegetation preventing external access
• Unsafe roof conditions
• Other physical restrictions

Photographs also provide the purchaser with a much better understanding of why an area could not be fully inspected.

Inspectors Need to Make Their Own Safety Assessment

Another important point is that access conditions can involve professional judgement.

The question should not simply be:

“Could somebody physically get in there?”

The more appropriate questions include:

Could the inspector safely access the area?

Could the inspector reasonably move through the area and conduct a meaningful visual inspection?

Were there physical obstructions?

Could entering the area damage the property?

Were conditions unsafe at the time?

An inspector should not be expected to expose themselves to unreasonable risk simply because another person may later believe they could physically enter the area.

The actual conditions existing at the time of the original inspection are important.

What Should Home Buyers Do When an Important Area Cannot Be Inspected?

Do not simply ignore the restriction.

If a significant area such as a subfloor or roof space cannot be adequately inspected, discuss it with the inspector.

Depending upon the circumstances, appropriate action could include:

• Obtaining improved access
• Removing obstructions with the owner’s permission
• Arranging a further inspection
• Obtaining an invasive inspection where justified and authorised
• Having a relevant specialist investigate a particular issue
• Considering the uncertainty when deciding whether to proceed with the purchase

This is particularly important where other visible evidence raises concerns about an inaccessible area.

A Building Inspection Is Not a Guarantee

Even the most thorough inspector cannot see through walls, floors, ceilings or other concealed building components.

Nor can an inspector predict every future defect.

The purpose of a professional pre-purchase inspection is to identify and report upon the condition of the building within the scope of the inspection and within areas that can reasonably and safely be inspected at that time.

Home buyers should therefore read the entire inspection report, including the access restrictions, limitations and recommendations—not simply the list of defects.

Experience and Inspection Equipment Matter

A good inspection involves much more than walking through a house with a clipboard.

An experienced inspector needs to understand:

• Building construction
• Structural behaviour
• Moisture
• Drainage
• Roofing
• Subfloor construction
• Timber deterioration
• Cracking
• Building movement
• Timber pest risk
• Access and safety
• The limitations of visual inspection

Modern inspection equipment including moisture meters, thermal imaging cameras and drones can provide additional information, but equipment is only as useful as the person interpreting the results.

Protecting Yourself Before Purchasing a Melbourne Property

Before purchasing a property, understand both what the inspector found and what the inspector could not inspect.

A report identifying restricted access should not necessarily discourage a purchaser from buying the property.

It should alert the purchaser that uncertainty remains within those areas.

Where that uncertainty involves an important part of the building, further investigation before purchase may be appropriate.

A professional building inspection should therefore clearly communicate three things:

What was inspected.

What defects were identified.

What could not be adequately inspected and why.

Understanding all three gives Melbourne home buyers a much clearer picture of the property they are considering purchasing