Pre-Sale Roof Inspection: What Buyers & Inspectors Check

6 min read

If you’re preparing to sell your Perth home, the roof is one of the first things that will cost you - or save you - at the negotiating table.

Buyers commission building inspections as a matter of course, and the roof section of that report carries enormous weight. A clean bill of health gives buyers confidence. A list of defects gives them leverage to knock thousands off the price or walk away entirely.

Here’s what inspectors actually look for and how to prepare.

What Building Inspectors Check on the Roof

A pre-purchase building inspection follows Australian Standard AS 4349.1. The roof inspection covers both the external surface and the internal cavity (if accessible). Here’s what they’re checking:

External Roof Surface

• Ridge capping condition - Are the ridge caps sitting flat and level? Is the pointing (the mortar holding them down) intact, cracked, or missing?
• Tile/sheet condition - Cracked, broken, chipped, or missing tiles. Rust, corrosion, or lifting on metal roofs.
• Coating condition - Is the paint or coating intact, or is it chalking, peeling, flaking, or faded?
• Valleys and flashings - Are the metal valleys and flashings corroded, lifted, or improperly sealed?
• Gutters and downpipes - Rust, sagging, blockages, overflows, incorrect fall
• Roof penetrations - Condition of seals around vents, pipes, aerials, solar panel mounts
• Evidence of past repairs - Silicone patches, mismatched tiles, amateur pointing repairs
• Moss, lichen, and organic growth - Indicates moisture retention and potential surface degradation

Internal Roof Cavity

• Timber condition - Signs of rot, termite damage, or moisture staining on rafters, battens, and trusses
• Structural integrity - Sagging, spreading, cracked, or undersized timbers
• Ventilation - Adequate airflow, blocked vents, condensation evidence
• Insulation - Type, condition, coverage, and any water damage
• Daylight visible - Light coming through from outside indicates gaps in the roof cladding
• Active leaks or stains - Water stains on timbers or insulation indicate current or past leaks
• Electrical and plumbing - Any services running through the cavity that may affect roof work

What Gets Flagged as “Major Defect”

Not everything an inspector finds is a dealbreaker. Reports categorise issues by severity:

Major defects (the ones that scare buyers):

• Structural timber damage from termites or rot
• Active leaks with water damage to framing
• Significant sagging or structural movement
• Asbestos roofing material (especially if damaged or deteriorating)
• Missing or severely corroded valley irons

Significant maintenance items (negotiation leverage):

• Widespread cracked pointing requiring full repoint
• Multiple broken or cracked tiles
• Coating failure requiring full repaint/restoration
• Corroded gutters needing replacement
• Failed flashings

Minor maintenance (noted but rarely negotiated):

• A few cracked tiles
• Minor pointing wear
• Surface moss or lichen
• Cosmetic coating fade

How Much Do Roof Defects Cost You at Sale?

Here’s where it gets expensive. Buyers don’t just deduct the cost of repairs - they deduct the cost of repairs plus a margin for inconvenience, uncertainty, and risk.

If a roof restoration would cost $8,000, a buyer might ask for $10,000-$12,000 off the sale price to “deal with it themselves.” They’re pricing in the hassle, the time, and the risk that the problem is worse than the report suggests.

On top of that, some buyers simply walk away from properties with major roof issues. They don’t want the stress. That means fewer offers, longer time on market, and potentially a lower sale price even if the buyer who does make an offer doesn’t ask for a specific discount.

In a competitive Perth market, a property with a clean inspection report sells faster and for more money.

Preparing Your Roof Before Listing

3-6 Months Before Listing

Get your own inspection first. Hire a building inspector or ask a roofing contractor to do a thorough assessment. This gives you time to fix issues on your terms rather than scrambling to respond to a buyer’s inspection report.

Fix structural issues immediately. Anything involving timber damage, active leaks, or structural integrity needs to be addressed by a qualified professional. These are the items that kill deals.

Consider a full roof restoration if the roof surface is in poor condition. A freshly restored roof is one of the most visible improvements you can make - buyers see it from the street before they even walk through the front door. The cost of a restoration ($6,000-$15,000) is typically recovered in the sale price, and then some.

1-3 Months Before Listing

Address all pointing and capping. Cracked or missing pointing is one of the most commonly flagged items. A full repoint is relatively affordable and eliminates a chunk of the inspection report.

Replace broken tiles. Even a few cracked tiles get noted and give buyers ammunition. Tile replacements are inexpensive and make a visible difference.

Clean the gutters. Blocked or overflowing gutters suggest neglect - and inspectors check them.

Clear moss and lichen. Organic growth is cosmetically unappealing and gets flagged. A professional roof clean removes it and dramatically improves the roof’s appearance.

1 Month Before Listing

Clean up the roof cavity. Clear debris, check that insulation is evenly distributed, and make sure the inspector has safe access. A neat, accessible cavity gives a better impression than one that’s stuffed with junk.

Collect documentation. If you’ve had roof work done, have the invoices, warranty paperwork, and any product data sheets ready. Buyers and their inspectors look favourably on documented maintenance history.

What Buyers Notice from the Street

Before the formal inspection even happens, buyers form impressions during the first drive-by or open home:

• Faded, patchy, or discoloured roof - suggests age and neglect
• Visible broken tiles or displaced capping - suggests deferred maintenance
• Clean gutters with no overflow stains - suggests a well-maintained home
• Fresh, even coating - suggests recent restoration and care
• Moss-covered or green-tinged roof - suggests moisture issues

First impressions matter. A restored roof doesn’t just pass the inspection - it creates a positive impression before the buyer even walks through the door.

Is a Pre-Sale Restoration Worth It?

For most Perth homes with roofs older than 15 years, yes. The maths usually works out:

• Cost of restoration: $6,000-$15,000 depending on size and scope
• Avoided price negotiation: $10,000-$20,000 (buyers discount more than the repair cost)
• Faster sale: Weeks or months less time on market
• Warranty transfer: A Dulux-backed restoration warranty transfers to the new owner, which is a genuine selling point

The exception is if the roof is genuinely in good condition - recently restored, well-maintained, no defects. In that case, a clean and a minor touch-up might be all that’s needed.

The Bottom Line

Your roof is the most visible element of your home’s exterior and one of the most scrutinised items in a building inspection. Investing in it before listing isn’t just cosmetic - it directly affects your sale price, negotiation position, and time on market.

The smart move is to inspect early, fix strategically, and present buyers with a roof that doesn’t give them a reason to negotiate. If you’re listing soon, get a quote for the work while there’s still time to have it done before the photos go up.