Can I Safely Walk on a Concrete Tile Roof Without Cracking Tiles?

Yes, you can walk on a concrete tile roof without cracking tiles — but only if you step in the right spots, wear the right footwear, and take proper safety precautions. Concrete tiles are reasonably robust, but they are designed to bear load only at specific points. Step in the wrong place and you risk cracking tiles, damaging the waterproof underlay beneath, or worse, falling.

Why Concrete Tiles Crack Under Foot

Concrete tiles are strong in compression when supported at their ends (the head and tail), but they are surprisingly brittle when loaded mid-span. Each tile overlaps the one below it, and the safe load-bearing zone is near the lower third of the tile — the thickest part, closest to the batten. Stepping on the upper portion or the centre of a tile puts bending stress across unsupported span, which is where cracking happens.

Older tiles can also become more brittle over time, especially if they have absorbed moisture or have surface carbonation. If your roof is more than 20–30 years old, treat every tile with extra care.

Where to Step: The Golden Rule

Always step on the overlap zone — the lower third of each tile, directly above the batten line underneath. This is where the tile is supported and where it can handle your weight.

• Step near the butt (bottom edge) of the tile, not the middle or top.
• Step on the overlap between two tiles where possible — this spreads your weight across two tiles simultaneously.
• Avoid the centre span of any single tile at all costs.
• On profiled (curved) tiles, step on the crown of the profile rather than the valley, as the crown sits closest to the batten.

A useful mental image: imagine the roof as a series of horizontal bands. Each band is a safe zone. Move steadily from band to band rather than taking long strides.

Footwear and Equipment

The right gear makes a significant difference:

• Soft-soled shoes (rubber-soled sneakers or dedicated roofing boots) grip the tile surface and distribute your weight better than hard-soled boots.
• Avoid bare feet — you lose protection and grip on wet or algae-covered tiles.
• Never walk on a wet or frost-covered roof. Concrete tiles become extremely slippery when wet.
• Use a roof ladder or chicken ladder (a ladder with a ridge hook) to spread your weight and give you something to hold onto. These are available at Bunnings and Mitre 10.

Height Safety: This Is Critical

In New Zealand, falls from roofs are one of the leading causes of serious injury and death for both tradespeople and homeowners. WorkSafe NZ has clear guidance that any work at height requires appropriate fall protection.

Before you go anywhere near your roof:

• Assess the pitch — roofs steeper than about 25° are significantly more dangerous to walk on.
• Use a safety harness and anchor point if the roof is steep or if you are working near the edge.
• Never work alone. Have someone on the ground who knows where you are.
• Do not access the roof in windy conditions.

If you are not confident with heights or do not have the right safety equipment, do not attempt it. This is not a situation where improvisation is acceptable.

Checking for Damage Before and After

Before walking on the roof, inspect from the ground or from a ladder at the eaves:

• Look for already-cracked, slipped, or missing tiles.
• Check for moss or lichen growth, which can make tiles slippery and may indicate moisture issues.
• After any roof access, inspect from the ground again and check your ceiling space for any new daylight or moisture ingress.

For guidance on roof maintenance and weathertightness, BRANZ publishes reliable technical information relevant to NZ conditions.

NZ Building Code Considerations

If you are accessing the roof to carry out repairs or modifications, be aware that some roofing work may require a building consent. Simple like-for-like tile replacement generally falls under Schedule 1 exemptions, but always confirm with your local council before starting work. The MBIE Building Performance website has a useful guide to what requires consent.

Roofing work must also comply with relevant NZ Building Code clauses such as E2 (External Moisture) where relevant. NZS 3604 applies to timber-framed buildings generally; confirm with your council or a professional which standards apply to your specific roofing work.

When to Call a Professional

There are situations where you should always hire a qualified roofer rather than attempting the job yourself:

• Steep roofs (generally over 25–30°) where safe access requires specialist equipment.
• Widespread cracking, slipping, or missing tiles — this is a re-roofing or major repair job.
• Any work near roof penetrations such as skylights, chimneys, or flashing, where incorrect work can cause serious water damage.
• If you are unsure at all — a professional roofer can inspect and carry out repairs safely and efficiently.

A qualified local roofer will have the right safety gear, experience walking on tile roofs daily, and knowledge of NZ weathertightness requirements. You can find licensed roofing tradespeople in your area on tradedirectory.co.nz.

Sources & Further Reading

• WorkSafe NZ – Working at Height
• BRANZ – Roof Maintenance and Weathertightness
• MBIE Building Performance – Building Consent Exemptions
• Bunnings – Roof Ladders and Safety Equipment
• Mitre 10 – Roofing Accessories